diff --git a/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcElementRestart.java b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcElementRestart.java
new file mode 100644
index 0000000..3815989
--- /dev/null
+++ b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcElementRestart.java
@@ -0,0 +1,73 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.models.acm.concepts;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.UUID;
+import java.util.function.UnaryOperator;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
+import lombok.ToString;
+import org.onap.policy.models.base.PfConceptKey;
+import org.onap.policy.models.base.PfUtils;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
+
+@NoArgsConstructor
+@Data
+@ToString
+public class AcElementRestart {
+
+    @NonNull
+    private UUID id = UUID.randomUUID();
+
+    @NonNull
+    private ToscaConceptIdentifier definition = new ToscaConceptIdentifier(PfConceptKey.getNullKey());
+
+    // State of the AutomationCompositionElement
+    private DeployState deployState;
+
+    // State of the AutomationCompositionElement
+    private LockState lockState;
+
+    private ToscaServiceTemplate toscaServiceTemplateFragment;
+
+    // A map indexed by the property name. Each map entry is the serialized value of the property,
+    // which can be deserialized into an instance of the type of the property.
+    private Map<String, Object> properties = new LinkedHashMap<>();
+
+    /**
+     * Copy constructor, does a deep copy but as all fields here are immutable, it's just a regular copy.
+     *
+     * @param otherElement the other element to copy from
+     */
+    public AcElementRestart(final AcElementRestart otherElement) {
+        this.id = otherElement.id;
+        this.definition = new ToscaConceptIdentifier(otherElement.definition);
+        this.deployState = otherElement.deployState;
+        this.lockState = otherElement.lockState;
+        this.toscaServiceTemplateFragment = otherElement.toscaServiceTemplateFragment;
+        this.properties = PfUtils.mapMap(otherElement.properties, UnaryOperator.identity());
+    }
+
+}
diff --git a/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcTypeState.java b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcTypeState.java
index 8e36f7a..76851b4 100644
--- a/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcTypeState.java
+++ b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/AcTypeState.java
@@ -25,6 +25,5 @@
     COMMISSIONED,
     PRIMING,
     PRIMED,
-    DEPRIMING,
-    RESTARTING
+    DEPRIMING
 }
diff --git a/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/ParticipantRestartAc.java b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/ParticipantRestartAc.java
index b8ee020..e5f4ad4 100644
--- a/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/ParticipantRestartAc.java
+++ b/models/src/main/java/org/onap/policy/clamp/models/acm/concepts/ParticipantRestartAc.java
@@ -37,11 +37,7 @@
 
     private UUID automationCompositionId;
 
-    // current state of auto composition
-    private DeployState deployState;
-    private LockState lockState;
-
-    private List<AcElementDeploy> acElementList = new ArrayList<>();
+    private List<AcElementRestart> acElementList = new ArrayList<>();
 
     /**
      * Copy constructor.
@@ -50,8 +46,6 @@
      */
     public ParticipantRestartAc(ParticipantRestartAc copyConstructor) {
         this.automationCompositionId = copyConstructor.automationCompositionId;
-        this.deployState = copyConstructor.deployState;
-        this.lockState = copyConstructor.lockState;
-        this.acElementList = PfUtils.mapList(copyConstructor.acElementList, AcElementDeploy::new);
+        this.acElementList = PfUtils.mapList(copyConstructor.acElementList, AcElementRestart::new);
     }
 }
diff --git a/models/src/main/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestart.java b/models/src/main/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestart.java
index 6b801ce..c86a3e4 100644
--- a/models/src/main/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestart.java
+++ b/models/src/main/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestart.java
@@ -25,6 +25,7 @@
 import lombok.Getter;
 import lombok.Setter;
 import lombok.ToString;
+import org.onap.policy.clamp.models.acm.concepts.AcTypeState;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantDefinition;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantRestartAc;
 import org.onap.policy.models.base.PfUtils;
@@ -34,11 +35,14 @@
 @ToString(callSuper = true)
 public class ParticipantRestart extends ParticipantMessage {
 
-    // priming
+    // composition state
+    AcTypeState state;
+
+    // element definition
     private List<ParticipantDefinition> participantDefinitionUpdates = new ArrayList<>();
 
-    // autocomposition list
-    private List<ParticipantRestartAc> autocompositionList = new ArrayList<>();
+    // automationcomposition instances list
+    private List<ParticipantRestartAc> automationcompositionList = new ArrayList<>();
 
     /**
      * Constructor.
@@ -56,6 +60,6 @@
         super(source);
         this.participantDefinitionUpdates =
                 PfUtils.mapList(source.participantDefinitionUpdates, ParticipantDefinition::new);
-        this.autocompositionList = PfUtils.mapList(source.autocompositionList, ParticipantRestartAc::new);
+        this.automationcompositionList = PfUtils.mapList(source.automationcompositionList, ParticipantRestartAc::new);
     }
 }
diff --git a/models/src/main/java/org/onap/policy/clamp/models/acm/utils/AcmUtils.java b/models/src/main/java/org/onap/policy/clamp/models/acm/utils/AcmUtils.java
index ee8e010..ae49ec6 100644
--- a/models/src/main/java/org/onap/policy/clamp/models/acm/utils/AcmUtils.java
+++ b/models/src/main/java/org/onap/policy/clamp/models/acm/utils/AcmUtils.java
@@ -36,6 +36,7 @@
 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.MapUtils;
 import org.onap.policy.clamp.models.acm.concepts.AcElementDeploy;
+import org.onap.policy.clamp.models.acm.concepts.AcElementRestart;
 import org.onap.policy.clamp.models.acm.concepts.AcTypeState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
@@ -426,4 +427,19 @@
         return acElementDeploy;
     }
 
+    /**
+     * Create a new AcElementRestart from an AutomationCompositionElement.
+     *
+     * @param element the AutomationCompositionElement
+     * @return the AcElementRestart
+     */
+    public static AcElementRestart createAcElementRestart(AutomationCompositionElement element) {
+        var acElementRestart = new AcElementRestart();
+        acElementRestart.setId(element.getId());
+        acElementRestart.setDefinition(new ToscaConceptIdentifier(element.getDefinition()));
+        acElementRestart.setDeployState(element.getDeployState());
+        acElementRestart.setLockState(element.getLockState());
+        acElementRestart.setProperties(PfUtils.mapMap(element.getProperties(), UnaryOperator.identity()));
+        return acElementRestart;
+    }
 }
diff --git a/models/src/test/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestartTest.java b/models/src/test/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestartTest.java
index 1ae607e..ba84ac7 100644
--- a/models/src/test/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestartTest.java
+++ b/models/src/test/java/org/onap/policy/clamp/models/acm/messages/dmaap/participant/ParticipantRestartTest.java
@@ -29,9 +29,7 @@
 import java.util.List;
 import java.util.UUID;
 import org.junit.jupiter.api.Test;
-import org.onap.policy.clamp.models.acm.concepts.AcElementDeploy;
-import org.onap.policy.clamp.models.acm.concepts.DeployState;
-import org.onap.policy.clamp.models.acm.concepts.LockState;
+import org.onap.policy.clamp.models.acm.concepts.AcElementRestart;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantDefinition;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantRestartAc;
 import org.onap.policy.clamp.models.acm.utils.CommonTestData;
@@ -60,7 +58,7 @@
         participantDefinitionUpdate.setAutomationCompositionElementDefinitionList(List.of(acDefinition));
         orig.setParticipantDefinitionUpdates(List.of(participantDefinitionUpdate));
 
-        var acElement = new AcElementDeploy();
+        var acElement = new AcElementRestart();
         acElement.setId(UUID.randomUUID());
         var id = new ToscaConceptIdentifier("id", "1.2.3");
         acElement.setDefinition(id);
@@ -68,10 +66,8 @@
         var acRestart = new ParticipantRestartAc();
         acRestart.setAcElementList(List.of(acElement));
         acRestart.setAutomationCompositionId(UUID.randomUUID());
-        acRestart.setDeployState(DeployState.DEPLOYED);
-        acRestart.setLockState(LockState.LOCKED);
 
-        orig.setAutocompositionList(List.of(acRestart));
+        orig.setAutomationcompositionList(List.of(acRestart));
 
         assertEquals(removeVariableFields(orig.toString()),
                 removeVariableFields(new ParticipantRestart(orig).toString()));
diff --git a/models/src/test/java/org/onap/policy/clamp/models/acm/utils/AcmUtilsTest.java b/models/src/test/java/org/onap/policy/clamp/models/acm/utils/AcmUtilsTest.java
index 7e8f605..a9bd25f 100644
--- a/models/src/test/java/org/onap/policy/clamp/models/acm/utils/AcmUtilsTest.java
+++ b/models/src/test/java/org/onap/policy/clamp/models/acm/utils/AcmUtilsTest.java
@@ -66,6 +66,8 @@
         assertThat(AcmUtils.isInTransitionalState(DeployState.UNDEPLOYING, LockState.NONE)).isTrue();
         assertThat(AcmUtils.isInTransitionalState(DeployState.DEPLOYED, LockState.LOCKING)).isTrue();
         assertThat(AcmUtils.isInTransitionalState(DeployState.DEPLOYED, LockState.UNLOCKING)).isTrue();
+        assertThat(AcmUtils.isInTransitionalState(DeployState.DELETING, LockState.NONE)).isTrue();
+        assertThat(AcmUtils.isInTransitionalState(DeployState.UPDATING, LockState.LOCKED)).isTrue();
     }
 
     @Test
@@ -192,6 +194,16 @@
         assertEquals(element.getDefinition(), result.getDefinition());
     }
 
+    @Test
+    void testCreateAcElementRestart() {
+        var element = getDummyAutomationComposition().getElements().values().iterator().next();
+        var result = AcmUtils.createAcElementRestart(element);
+        assertEquals(element.getId(), result.getId());
+        assertEquals(element.getDefinition(), result.getDefinition());
+        assertEquals(element.getDeployState(), result.getDeployState());
+        assertEquals(element.getLockState(), result.getLockState());
+    }
+
     private AutomationComposition getDummyAutomationComposition() {
         var automationComposition = new AutomationComposition();
         automationComposition.setCompositionId(UUID.randomUUID());
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProvider.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProvider.java
index c79e317..961f12a 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProvider.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProvider.java
@@ -130,7 +130,7 @@
         var acDefinition = acDefinitionProvider.getAcDefinition(compositionId);
         if (!AcTypeState.COMMISSIONED.equals(acDefinition.getState())) {
             throw new PfModelRuntimeException(Status.BAD_REQUEST,
-                    "ACM not in COMMISSIONED state, Update of ACM Definition not allowed");
+                    "ACM not in COMMISSIONED state, Delete of ACM Definition not allowed");
         }
         var serviceTemplate = acDefinitionProvider.deleteAcDefintion(compositionId);
         return createCommissioningResponse(compositionId, serviceTemplate);
@@ -184,6 +184,10 @@
             throw new PfModelRuntimeException(Status.BAD_REQUEST, "There are instances, Priming/Depriming not allowed");
         }
         var acmDefinition = acDefinitionProvider.getAcDefinition(compositionId);
+        if (acmDefinition.getRestarting() != null) {
+            throw new PfModelRuntimeException(Status.BAD_REQUEST,
+                    "There is a restarting process, Priming/Depriming not allowed");
+        }
         var stateOrdered = acTypeStateResolver.resolve(acTypeStateUpdate.getPrimeOrder(), acmDefinition.getState(),
                 acmDefinition.getStateChangeResult());
         switch (stateOrdered) {
@@ -220,7 +224,7 @@
                 participantIds.add(participantId);
             }
         }
-        if (! participantIds.isEmpty()) {
+        if (!participantIds.isEmpty()) {
             acmParticipantProvider.verifyParticipantState(participantIds);
         }
         acmDefinition.setState(AcTypeState.DEPRIMING);
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProvider.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProvider.java
index ab3b00d..710a975 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProvider.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProvider.java
@@ -155,6 +155,9 @@
                         .putAll(automationComposition.getElements().get(elementId).getProperties());
             }
         }
+        if (automationComposition.getRestarting() != null) {
+            throw new PfModelRuntimeException(Status.BAD_REQUEST, "There is a restarting process, Update not allowed");
+        }
         var validationResult = validateAutomationComposition(acToBeUpdated);
         if (!validationResult.isValid()) {
             throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, validationResult.getResult());
@@ -187,10 +190,16 @@
             return result;
         }
         if (!AcTypeState.PRIMED.equals(acDefinitionOpt.get().getState())) {
-            result.addResult(new ObjectValidationResult("ServiceTemplate", acDefinitionOpt.get().getState(),
+            result.addResult(new ObjectValidationResult("ServiceTemplate.state", acDefinitionOpt.get().getState(),
                     ValidationStatus.INVALID, "Commissioned automation composition definition not primed"));
             return result;
         }
+        if (acDefinitionOpt.get().getRestarting() != null) {
+            result.addResult(
+                    new ObjectValidationResult("ServiceTemplate.restarting", acDefinitionOpt.get().getRestarting(),
+                            ValidationStatus.INVALID, "There is a restarting process in composition"));
+            return result;
+        }
         var participantIds = acDefinitionOpt.get().getElementStateMap().values().stream()
                 .map(NodeTemplateState::getParticipantId).collect(Collectors.toSet());
 
@@ -245,8 +254,10 @@
             throw new PfModelRuntimeException(Response.Status.BAD_REQUEST,
                     "Automation composition state is still " + automationComposition.getDeployState());
         }
-        var acDefinition = acDefinitionProvider
-                .getAcDefinition(automationComposition.getCompositionId());
+        if (automationComposition.getRestarting() != null) {
+            throw new PfModelRuntimeException(Status.BAD_REQUEST, "There is a restarting process, Delete not allowed");
+        }
+        var acDefinition = acDefinitionProvider.getAcDefinition(automationComposition.getCompositionId());
         if (acDefinition != null) {
             var participantIds = acDefinition.getElementStateMap().values().stream()
                     .map(NodeTemplateState::getParticipantId).collect(Collectors.toSet());
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAcHandler.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAcHandler.java
index 536e3e2..5a2079b 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAcHandler.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAcHandler.java
@@ -22,6 +22,7 @@
 
 import io.micrometer.core.annotation.Timed;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.UUID;
 import lombok.AllArgsConstructor;
@@ -31,6 +32,7 @@
 import org.onap.policy.clamp.models.acm.concepts.AcElementDeployAck;
 import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionDefinition;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.DeployState;
 import org.onap.policy.clamp.models.acm.concepts.LockState;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantUtils;
@@ -78,8 +80,8 @@
         automationComposition.setStateChangeResult(StateChangeResult.NO_ERROR);
         automationCompositionProvider.updateAutomationComposition(automationComposition);
         var startPhase = ParticipantUtils.getFirstStartPhase(automationComposition, acDefinition.getServiceTemplate());
-        automationCompositionDeployPublisher.send(automationComposition, acDefinition.getServiceTemplate(),
-                startPhase, true);
+        automationCompositionDeployPublisher.send(automationComposition, acDefinition.getServiceTemplate(), startPhase,
+                true);
     }
 
     /**
@@ -261,9 +263,19 @@
                 element.setUseState(acElementAck.getValue().getUseState());
                 element.setDeployState(acElementAck.getValue().getDeployState());
                 element.setLockState(acElementAck.getValue().getLockState());
+                element.setRestarting(null);
                 updated = true;
             }
         }
+
+        if (automationComposition.getRestarting() != null) {
+            var restarting = automationComposition.getElements().values().stream()
+                    .map(AutomationCompositionElement::getRestarting).filter(Objects::nonNull).findAny();
+            if (restarting.isEmpty()) {
+                automationComposition.setRestarting(null);
+            }
+        }
+
         return updated;
     }
 }
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAspect.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAspect.java
index 7303fc8..079f218 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAspect.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionAspect.java
@@ -68,13 +68,13 @@
     public void doCheck() {
         if (executor.getQueue().size() < 2) {
             LOGGER.debug("Add scanning Message");
-            executor.execute(() -> supervisionScanner.run());
+            executor.execute(supervisionScanner::run);
         }
     }
 
-    @Before("@annotation(MessageIntercept) && args(participantStatusMessage,..)")
-    public void handleParticipantStatus(ParticipantStatus participantStatusMessage) {
-        executor.execute(() -> partecipantScanner.handleParticipantStatus(participantStatusMessage.getParticipantId()));
+    @Before("@annotation(MessageIntercept) && args(participantStatusMsg,..)")
+    public void handleParticipantStatus(ParticipantStatus participantStatusMsg) {
+        executor.execute(() -> partecipantScanner.handleParticipantStatus(participantStatusMsg.getParticipantId()));
     }
 
     @Override
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionHandler.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionHandler.java
index a18ea19..4f58801 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionHandler.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionHandler.java
@@ -58,7 +58,7 @@
         }
         var acDefinition = acDefinitionOpt.get();
         if (!AcTypeState.PRIMING.equals(acDefinition.getState())
-                && !AcTypeState.DEPRIMING.equals(acDefinition.getState())) {
+                && !AcTypeState.DEPRIMING.equals(acDefinition.getState()) && acDefinition.getRestarting() == null) {
             LOGGER.error("AC Definition {} already primed/deprimed with participant {}",
                     participantPrimeAckMessage.getCompositionId(), participantPrimeAckMessage.getParticipantId());
             return;
@@ -68,8 +68,8 @@
 
     private void handleParticipantPrimeAck(ParticipantPrimeAck participantPrimeAckMessage,
             AutomationCompositionDefinition acDefinition) {
-        var finalState =
-                AcTypeState.PRIMING.equals(acDefinition.getState()) ? AcTypeState.PRIMED : AcTypeState.COMMISSIONED;
+        var finalState = AcTypeState.PRIMING.equals(acDefinition.getState())
+                || AcTypeState.PRIMED.equals(acDefinition.getState()) ? AcTypeState.PRIMED : AcTypeState.COMMISSIONED;
         var msgInErrors = StateChangeResult.FAILED.equals(participantPrimeAckMessage.getStateChangeResult());
         boolean inProgress = !StateChangeResult.FAILED.equals(acDefinition.getStateChangeResult());
         if (inProgress && msgInErrors) {
@@ -77,14 +77,19 @@
         }
 
         boolean completed = true;
+        boolean restarting = false;
         for (var element : acDefinition.getElementStateMap().values()) {
             if (participantPrimeAckMessage.getParticipantId().equals(element.getParticipantId())) {
                 element.setMessage(participantPrimeAckMessage.getMessage());
                 element.setState(participantPrimeAckMessage.getCompositionState());
+                element.setRestarting(null);
             }
             if (!finalState.equals(element.getState())) {
                 completed = false;
             }
+            if (element.getRestarting() != null) {
+                restarting = true;
+            }
         }
 
         if (inProgress && !msgInErrors && completed) {
@@ -92,7 +97,9 @@
             if (StateChangeResult.TIMEOUT.equals(acDefinition.getStateChangeResult())) {
                 acDefinition.setStateChangeResult(StateChangeResult.NO_ERROR);
             }
-
+        }
+        if (!restarting) {
+            acDefinition.setRestarting(null);
         }
         acDefinitionProvider.updateAcDefinition(acDefinition);
     }
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionPartecipantScanner.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionPartecipantScanner.java
index 092fc35..c07c584 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionPartecipantScanner.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionPartecipantScanner.java
@@ -46,9 +46,8 @@
      * @param participantProvider the Participant Provider
      * @param acRuntimeParameterGroup the parameters for the automation composition runtime
      */
-    public SupervisionPartecipantScanner(
-                              final ParticipantProvider participantProvider,
-                              final AcRuntimeParameterGroup acRuntimeParameterGroup) {
+    public SupervisionPartecipantScanner(final ParticipantProvider participantProvider,
+            final AcRuntimeParameterGroup acRuntimeParameterGroup) {
         this.participantProvider = participantProvider;
 
         participantStatusTimeout.setMaxWaitMs(acRuntimeParameterGroup.getParticipantParameters().getMaxStatusWaitMs());
@@ -70,11 +69,17 @@
     private void scanParticipantStatus(Participant participant) {
         var id = participant.getParticipantId();
         if (participantStatusTimeout.isTimeout(id)) {
-            LOGGER.debug("report Participant fault");
-            return;
+            if (ParticipantState.ON_LINE.equals(participant.getParticipantState())) {
+                // restart scenario
+                LOGGER.debug("Participant is back ON_LINE {}", id);
+                participantStatusTimeout.clear(id);
+            } else {
+                LOGGER.debug("report Participant is still OFF_LINE {}", id);
+                return;
+            }
         }
         if (participantStatusTimeout.getDuration(id) > participantStatusTimeout.getMaxWaitMs()) {
-            LOGGER.debug("report Participant fault");
+            LOGGER.debug("report Participant OFF_LINE {}", id);
             participantStatusTimeout.setTimeout(id);
             participant.setParticipantState(ParticipantState.OFF_LINE);
             participantProvider.updateParticipant(participant);
@@ -85,6 +90,7 @@
      * handle participant Status message.
      */
     public void handleParticipantStatus(UUID id) {
+        LOGGER.debug("Participant is ON_LINE {}", id);
         participantStatusTimeout.clear(id);
     }
 }
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandler.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandler.java
index 6d43803..e0d11ed 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandler.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandler.java
@@ -21,6 +21,7 @@
 package org.onap.policy.clamp.acm.runtime.supervision;
 
 import io.micrometer.core.annotation.Timed;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -29,13 +30,18 @@
 import org.apache.commons.collections4.MapUtils;
 import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantDeregisterAckPublisher;
 import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantRegisterAckPublisher;
+import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantRestartPublisher;
+import org.onap.policy.clamp.models.acm.concepts.AcTypeState;
+import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionDefinition;
 import org.onap.policy.clamp.models.acm.concepts.Participant;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantSupportedElementType;
+import org.onap.policy.clamp.models.acm.concepts.StateChangeResult;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantDeregister;
-import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessage;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantRegister;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantStatus;
+import org.onap.policy.clamp.models.acm.persistence.provider.AcDefinitionProvider;
 import org.onap.policy.clamp.models.acm.persistence.provider.AutomationCompositionProvider;
 import org.onap.policy.clamp.models.acm.persistence.provider.ParticipantProvider;
 import org.slf4j.Logger;
@@ -54,6 +60,8 @@
     private final ParticipantRegisterAckPublisher participantRegisterAckPublisher;
     private final ParticipantDeregisterAckPublisher participantDeregisterAckPublisher;
     private final AutomationCompositionProvider automationCompositionProvider;
+    private final AcDefinitionProvider acDefinitionProvider;
+    private final ParticipantRestartPublisher participantRestartPublisher;
 
     /**
      * Handle a ParticipantRegister message from a participant.
@@ -64,11 +72,24 @@
     @Timed(value = "listener.participant_register", description = "PARTICIPANT_REGISTER messages received")
     public void handleParticipantMessage(ParticipantRegister participantRegisterMsg) {
         LOGGER.debug("Participant Register received {}", participantRegisterMsg);
-        saveParticipantStatus(participantRegisterMsg,
-            listToMap(participantRegisterMsg.getParticipantSupportedElementType()));
+        var participantOpt = participantProvider.findParticipant(participantRegisterMsg.getParticipantId());
+
+        if (participantOpt.isPresent()) {
+            var participant = participantOpt.get();
+            if (ParticipantState.OFF_LINE.equals(participant.getParticipantState())) {
+                participant.setParticipantState(ParticipantState.ON_LINE);
+                participantProvider.saveParticipant(participant);
+            }
+            handleRestart(participant.getParticipantId());
+        } else {
+            var participant = createParticipant(participantRegisterMsg.getParticipantId(),
+                    listToMap(participantRegisterMsg.getParticipantSupportedElementType()));
+            participantProvider.saveParticipant(participant);
+
+        }
 
         participantRegisterAckPublisher.send(participantRegisterMsg.getMessageId(),
-            participantRegisterMsg.getParticipantId());
+                participantRegisterMsg.getParticipantId());
     }
 
     /**
@@ -100,32 +121,83 @@
     @Timed(value = "listener.participant_status", description = "PARTICIPANT_STATUS messages received")
     public void handleParticipantMessage(ParticipantStatus participantStatusMsg) {
         LOGGER.debug("Participant Status received {}", participantStatusMsg);
-        saveParticipantStatus(participantStatusMsg,
-            listToMap(participantStatusMsg.getParticipantSupportedElementType()));
+
+        var participantOpt = participantProvider.findParticipant(participantStatusMsg.getParticipantId());
+        if (participantOpt.isEmpty()) {
+            var participant = createParticipant(participantStatusMsg.getParticipantId(),
+                    listToMap(participantStatusMsg.getParticipantSupportedElementType()));
+            participantProvider.saveParticipant(participant);
+        }
         if (!participantStatusMsg.getAutomationCompositionInfoList().isEmpty()) {
             automationCompositionProvider.upgradeStates(participantStatusMsg.getAutomationCompositionInfoList());
         }
     }
 
-    private void saveParticipantStatus(ParticipantMessage participantMessage,
-            Map<UUID, ParticipantSupportedElementType> participantSupportedElementType) {
-        var participantOpt = participantProvider.findParticipant(participantMessage.getParticipantId());
-
-        if (participantOpt.isEmpty()) {
-            var participant = new Participant();
-            participant.setParticipantId(participantMessage.getParticipantId());
-            participant.setParticipantSupportedElementTypes(participantSupportedElementType);
-            participant.setParticipantState(ParticipantState.ON_LINE);
-
-            participantProvider.saveParticipant(participant);
-        } else {
-            var participant = participantOpt.get();
-            participant.setParticipantState(ParticipantState.ON_LINE);
-
-            participantProvider.updateParticipant(participant);
+    private void handleRestart(UUID participantId) {
+        var compositionIds = participantProvider.getCompositionIds(participantId);
+        for (var compositionId : compositionIds) {
+            var acDefinition = acDefinitionProvider.getAcDefinition(compositionId);
+            LOGGER.debug("Scan Composition {} for restart", acDefinition.getCompositionId());
+            handleRestart(participantId, acDefinition);
         }
     }
 
+    private void handleRestart(UUID participantId, AutomationCompositionDefinition acDefinition) {
+        if (AcTypeState.COMMISSIONED.equals(acDefinition.getState())) {
+            LOGGER.debug("Composition {} COMMISSIONED", acDefinition.getCompositionId());
+            return;
+        }
+        LOGGER.debug("Composition to be send in Restart message {}", acDefinition.getCompositionId());
+        for (var elementState : acDefinition.getElementStateMap().values()) {
+            if (participantId.equals(elementState.getParticipantId())) {
+                elementState.setRestarting(true);
+            }
+        }
+        var automationCompositionList =
+                automationCompositionProvider.getAcInstancesByCompositionId(acDefinition.getCompositionId());
+        List<AutomationComposition> automationCompositions = new ArrayList<>();
+        for (var automationComposition : automationCompositionList) {
+            if (isAcToBeRestarted(participantId, automationComposition)) {
+                automationCompositions.add(automationComposition);
+            }
+        }
+        // expected final state
+        if (StateChangeResult.TIMEOUT.equals(acDefinition.getStateChangeResult())) {
+            acDefinition.setStateChangeResult(StateChangeResult.NO_ERROR);
+        }
+        acDefinition.setRestarting(true);
+        acDefinitionProvider.updateAcDefinition(acDefinition);
+        participantRestartPublisher.send(participantId, acDefinition, automationCompositions);
+    }
+
+    private boolean isAcToBeRestarted(UUID participantId, AutomationComposition automationComposition) {
+        boolean toAdd = false;
+        for (var element : automationComposition.getElements().values()) {
+            if (participantId.equals(element.getParticipantId())) {
+                element.setRestarting(true);
+                toAdd = true;
+            }
+        }
+        if (toAdd) {
+            automationComposition.setRestarting(true);
+            // expected final state
+            if (StateChangeResult.TIMEOUT.equals(automationComposition.getStateChangeResult())) {
+                automationComposition.setStateChangeResult(StateChangeResult.NO_ERROR);
+            }
+            automationCompositionProvider.updateAutomationComposition(automationComposition);
+        }
+        return toAdd;
+    }
+
+    private Participant createParticipant(UUID participantId,
+            Map<UUID, ParticipantSupportedElementType> participantSupportedElementType) {
+        var participant = new Participant();
+        participant.setParticipantId(participantId);
+        participant.setParticipantSupportedElementTypes(participantSupportedElementType);
+        participant.setParticipantState(ParticipantState.ON_LINE);
+        return participant;
+    }
+
     private Map<UUID, ParticipantSupportedElementType> listToMap(List<ParticipantSupportedElementType> elementList) {
         Map<UUID, ParticipantSupportedElementType> map = new HashMap<>();
         MapUtils.populateMap(map, elementList, ParticipantSupportedElementType::getId);
diff --git a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/comm/ParticipantRestartPublisher.java b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/comm/ParticipantRestartPublisher.java
index cb00c8e..b086b19 100644
--- a/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/comm/ParticipantRestartPublisher.java
+++ b/runtime-acm/src/main/java/org/onap/policy/clamp/acm/runtime/supervision/comm/ParticipantRestartPublisher.java
@@ -34,7 +34,6 @@
 import org.onap.policy.clamp.models.acm.concepts.ParticipantDefinition;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantRestartAc;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantRestart;
-import org.onap.policy.clamp.models.acm.messages.rest.instantiation.DeployOrder;
 import org.onap.policy.clamp.models.acm.utils.AcmUtils;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaNodeTemplate;
@@ -51,6 +50,9 @@
     /**
      * Send Restart to Participant.
      *
+     * @param participantId the ParticipantId
+     * @param acmDefinition the AutomationComposition Definition
+     * @param automationCompositions the list of automationCompositions
      */
     @Timed(value = "publisher.participant_restart", description = "Participant Restart published")
     public void send(UUID participantId, AutomationCompositionDefinition acmDefinition,
@@ -61,21 +63,21 @@
         message.setCompositionId(acmDefinition.getCompositionId());
         message.setMessageId(UUID.randomUUID());
         message.setTimestamp(Instant.now());
+        message.setState(acmDefinition.getState());
         message.setParticipantDefinitionUpdates(prepareParticipantRestarting(participantId, acmDefinition));
+        var toscaServiceTemplateFragment = AcmUtils.getToscaServiceTemplateFragment(acmDefinition.getServiceTemplate());
 
         for (var automationComposition : automationCompositions) {
             var restartAc = new ParticipantRestartAc();
             restartAc.setAutomationCompositionId(automationComposition.getInstanceId());
-            restartAc.setDeployState(automationComposition.getDeployState());
-            restartAc.setLockState(automationComposition.getLockState());
             for (var element : automationComposition.getElements().values()) {
                 if (participantId.equals(element.getParticipantId())) {
-                    var acElementDeploy = AcmUtils.createAcElementDeploy(element, DeployOrder.RESTARTING);
-                    acElementDeploy.setToscaServiceTemplateFragment(acmDefinition.getServiceTemplate());
-                    restartAc.getAcElementList().add(acElementDeploy);
+                    var acElementRestart = AcmUtils.createAcElementRestart(element);
+                    acElementRestart.setToscaServiceTemplateFragment(toscaServiceTemplateFragment);
+                    restartAc.getAcElementList().add(acElementRestart);
                 }
             }
-            message.getAutocompositionList().add(restartAc);
+            message.getAutomationcompositionList().add(restartAc);
         }
 
         LOGGER.debug("Participant Restart sent {}", message);
diff --git a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProviderTest.java b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProviderTest.java
index 08d20ba..d7c79bc 100644
--- a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProviderTest.java
+++ b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/commissioning/CommissioningProviderTest.java
@@ -188,4 +188,57 @@
         provider.compositionDefinitionPriming(compositionId, acTypeStateUpdate);
         verify(participantPrimePublisher, timeout(1000).times(1)).sendDepriming(compositionId);
     }
+
+    @Test
+    void testBadRequest() {
+        var acProvider = mock(AutomationCompositionProvider.class);
+        var provider = new CommissioningProvider(mock(AcDefinitionProvider.class), acProvider,
+                mock(AcmParticipantProvider.class), new AcTypeStateResolver(), mock(ParticipantPrimePublisher.class));
+
+        var compositionId = UUID.randomUUID();
+        when(acProvider.getAcInstancesByCompositionId(compositionId)).thenReturn(List.of(new AutomationComposition()));
+
+        var toscaServiceTemplate = new ToscaServiceTemplate();
+        assertThatThrownBy(() -> provider.updateCompositionDefinition(compositionId, toscaServiceTemplate))
+                .hasMessageMatching("There are ACM instances, Update of ACM Definition not allowed");
+
+        var acTypeStateUpdate = new AcTypeStateUpdate();
+        assertThatThrownBy(() -> provider.compositionDefinitionPriming(compositionId, acTypeStateUpdate))
+                .hasMessageMatching("There are instances, Priming/Depriming not allowed");
+    }
+
+    @Test
+    void testPrimedBadRequest() {
+        var acDefinitionProvider = mock(AcDefinitionProvider.class);
+        var toscaServiceTemplate = InstantiationUtils.getToscaServiceTemplate(TOSCA_SERVICE_TEMPLATE_YAML);
+        var acmDefinition = CommonTestData.createAcDefinition(toscaServiceTemplate, AcTypeState.PRIMED);
+        var compositionId = acmDefinition.getCompositionId();
+        when(acDefinitionProvider.getAcDefinition(compositionId)).thenReturn(acmDefinition);
+
+        var provider = new CommissioningProvider(acDefinitionProvider, mock(AutomationCompositionProvider.class),
+                mock(AcmParticipantProvider.class), new AcTypeStateResolver(), mock(ParticipantPrimePublisher.class));
+
+        assertThatThrownBy(() -> provider.updateCompositionDefinition(compositionId, toscaServiceTemplate))
+                .hasMessageMatching("ACM not in COMMISSIONED state, Update of ACM Definition not allowed");
+
+        assertThatThrownBy(() -> provider.deleteAutomationCompositionDefinition(compositionId))
+                .hasMessageMatching("ACM not in COMMISSIONED state, Delete of ACM Definition not allowed");
+    }
+
+    @Test
+    void testPrimingBadRequest() {
+        var acDefinitionProvider = mock(AcDefinitionProvider.class);
+        var toscaServiceTemplate = InstantiationUtils.getToscaServiceTemplate(TOSCA_SERVICE_TEMPLATE_YAML);
+        var acmDefinition = CommonTestData.createAcDefinition(toscaServiceTemplate, AcTypeState.PRIMED);
+        acmDefinition.setRestarting(true);
+        var compositionId = acmDefinition.getCompositionId();
+        when(acDefinitionProvider.getAcDefinition(compositionId)).thenReturn(acmDefinition);
+
+        var provider = new CommissioningProvider(acDefinitionProvider, mock(AutomationCompositionProvider.class),
+                mock(AcmParticipantProvider.class), new AcTypeStateResolver(), mock(ParticipantPrimePublisher.class));
+
+        var acTypeStateUpdate = new AcTypeStateUpdate();
+        assertThatThrownBy(() -> provider.compositionDefinitionPriming(compositionId, acTypeStateUpdate))
+                .hasMessageMatching("There is a restarting process, Priming/Depriming not allowed");
+    }
 }
diff --git a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProviderTest.java b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProviderTest.java
index 13da979..3ac2efc 100644
--- a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProviderTest.java
+++ b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/instantiation/AutomationCompositionInstantiationProviderTest.java
@@ -145,6 +145,115 @@
     }
 
     @Test
+    void testInstantiationUpdate() throws AutomationCompositionException {
+        var acDefinitionProvider = mock(AcDefinitionProvider.class);
+        var acDefinition = CommonTestData.createAcDefinition(serviceTemplate, AcTypeState.PRIMED);
+        var compositionId = acDefinition.getCompositionId();
+        when(acDefinitionProvider.findAcDefinition(compositionId)).thenReturn(Optional.of(acDefinition));
+
+        var automationCompositionUpdate =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_UPDATE_JSON, "Crud");
+        automationCompositionUpdate.setCompositionId(compositionId);
+        automationCompositionUpdate.setDeployState(DeployState.DEPLOYED);
+        automationCompositionUpdate.setLockState(LockState.LOCKED);
+        var acProvider = mock(AutomationCompositionProvider.class);
+        when(acProvider.getAutomationComposition(automationCompositionUpdate.getInstanceId()))
+                .thenReturn(automationCompositionUpdate);
+        when(acProvider.updateAutomationComposition(automationCompositionUpdate))
+                .thenReturn(automationCompositionUpdate);
+
+        var supervisionAcHandler = mock(SupervisionAcHandler.class);
+        var acmParticipantProvider = mock(AcmParticipantProvider.class);
+        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider,
+                null, supervisionAcHandler, acmParticipantProvider);
+        var instantiationResponse = instantiationProvider.updateAutomationComposition(
+                automationCompositionUpdate.getCompositionId(), automationCompositionUpdate);
+
+        verify(supervisionAcHandler).update(any());
+        verify(acProvider).updateAutomationComposition(automationCompositionUpdate);
+        InstantiationUtils.assertInstantiationResponse(instantiationResponse, automationCompositionUpdate);
+    }
+
+    @Test
+    void testUpdateBadRequest() throws AutomationCompositionException {
+        var automationCompositionUpdate =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_UPDATE_JSON, "Crud");
+        automationCompositionUpdate.setDeployState(DeployState.DEPLOYING);
+        automationCompositionUpdate.setLockState(LockState.NONE);
+        var acProvider = mock(AutomationCompositionProvider.class);
+        when(acProvider.getAutomationComposition(automationCompositionUpdate.getInstanceId()))
+                .thenReturn(automationCompositionUpdate);
+
+        var instantiationProvider =
+                new AutomationCompositionInstantiationProvider(acProvider, mock(AcDefinitionProvider.class), null,
+                        mock(SupervisionAcHandler.class), mock(AcmParticipantProvider.class));
+
+        var compositionId = automationCompositionUpdate.getCompositionId();
+        assertThatThrownBy(
+                () -> instantiationProvider.updateAutomationComposition(compositionId, automationCompositionUpdate))
+                        .hasMessageMatching(
+                                "Not allowed to update in the state " + automationCompositionUpdate.getDeployState());
+    }
+
+    @Test
+    void testUpdateRestartedBadRequest() throws AutomationCompositionException {
+        var automationCompositionUpdate =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_UPDATE_JSON, "Crud");
+        automationCompositionUpdate.setDeployState(DeployState.DEPLOYED);
+        automationCompositionUpdate.setLockState(LockState.LOCKED);
+        automationCompositionUpdate.setRestarting(true);
+        var acProvider = mock(AutomationCompositionProvider.class);
+        when(acProvider.getAutomationComposition(automationCompositionUpdate.getInstanceId()))
+                .thenReturn(automationCompositionUpdate);
+
+        var instantiationProvider =
+                new AutomationCompositionInstantiationProvider(acProvider, mock(AcDefinitionProvider.class), null,
+                        mock(SupervisionAcHandler.class), mock(AcmParticipantProvider.class));
+
+        var compositionId = automationCompositionUpdate.getCompositionId();
+        assertThatThrownBy(
+                () -> instantiationProvider.updateAutomationComposition(compositionId, automationCompositionUpdate))
+                        .hasMessageMatching("There is a restarting process, Update not allowed");
+
+        automationCompositionUpdate.setDeployState(DeployState.UNDEPLOYED);
+        automationCompositionUpdate.setLockState(LockState.NONE);
+
+        var instanceId = automationCompositionUpdate.getInstanceId();
+        assertThatThrownBy(() -> instantiationProvider.deleteAutomationComposition(compositionId, instanceId))
+                .hasMessageMatching("There is a restarting process, Delete not allowed");
+    }
+
+    @Test
+    void testUpdateCompositionRestartedBadRequest() throws AutomationCompositionException {
+        var acDefinitionProvider = mock(AcDefinitionProvider.class);
+        var acDefinition = CommonTestData.createAcDefinition(serviceTemplate, AcTypeState.PRIMED);
+        acDefinition.setRestarting(true);
+        var compositionId = acDefinition.getCompositionId();
+        when(acDefinitionProvider.findAcDefinition(compositionId)).thenReturn(Optional.of(acDefinition));
+
+        var automationCompositionUpdate =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_UPDATE_JSON, "Crud");
+        automationCompositionUpdate.setCompositionId(compositionId);
+        automationCompositionUpdate.setDeployState(DeployState.DEPLOYED);
+        automationCompositionUpdate.setLockState(LockState.LOCKED);
+        var acProvider = mock(AutomationCompositionProvider.class);
+        when(acProvider.getAutomationComposition(automationCompositionUpdate.getInstanceId()))
+                .thenReturn(automationCompositionUpdate);
+        when(acProvider.updateAutomationComposition(automationCompositionUpdate))
+                .thenReturn(automationCompositionUpdate);
+
+        var supervisionAcHandler = mock(SupervisionAcHandler.class);
+        var acmParticipantProvider = mock(AcmParticipantProvider.class);
+        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider,
+                null, supervisionAcHandler, acmParticipantProvider);
+        assertThatThrownBy(
+                () -> instantiationProvider.updateAutomationComposition(compositionId, automationCompositionUpdate))
+                        .hasMessageMatching("\"AutomationComposition\" INVALID, item has status INVALID\n"
+                                + "  item \"ServiceTemplate.restarting\" value \"true\" INVALID,"
+                                + " There is a restarting process in composition\n");
+    }
+
+    @Test
     void testInstantiationDelete() {
         var automationComposition =
                 InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_CREATE_JSON, "Delete");
@@ -154,8 +263,8 @@
         var supervisionAcHandler = mock(SupervisionAcHandler.class);
         var acmParticipantProvider = mock(AcmParticipantProvider.class);
 
-        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider,
-                acDefinitionProvider, null, supervisionAcHandler, acmParticipantProvider);
+        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider,
+                null, supervisionAcHandler, acmParticipantProvider);
 
         when(acProvider.getAutomationComposition(automationComposition.getInstanceId()))
                 .thenReturn(automationComposition);
@@ -178,15 +287,15 @@
         verify(supervisionAcHandler).delete(any(), any());
     }
 
-    private void assertThatDeleteThrownBy(AutomationComposition automationComposition,
-            DeployState deployState, LockState lockState) {
+    private void assertThatDeleteThrownBy(AutomationComposition automationComposition, DeployState deployState,
+            LockState lockState) {
         automationComposition.setDeployState(deployState);
         automationComposition.setLockState(lockState);
         var acProvider = mock(AutomationCompositionProvider.class);
         var acDefinitionProvider = mock(AcDefinitionProvider.class);
 
-        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider,
-                acDefinitionProvider, null, null, null);
+        var instantiationProvider =
+                new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider, null, null, null);
 
         when(acProvider.getAutomationComposition(automationComposition.getInstanceId()))
                 .thenReturn(automationComposition);
@@ -214,8 +323,8 @@
                 .thenReturn(automationCompositionCreate);
         var acmParticipantProvider = mock(AcmParticipantProvider.class);
 
-        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider,
-                acDefinitionProvider, null, null, acmParticipantProvider);
+        var instantiationProvider = new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider,
+                null, null, acmParticipantProvider);
 
         var instantiationResponse = instantiationProvider.createAutomationComposition(
                 automationCompositionCreate.getCompositionId(), automationCompositionCreate);
@@ -241,8 +350,8 @@
         automationComposition.setCompositionId(compositionId);
 
         var acProvider = mock(AutomationCompositionProvider.class);
-        var provider = new AutomationCompositionInstantiationProvider(acProvider,
-                acDefinitionProvider, null, null, acmParticipantProvider);
+        var provider = new AutomationCompositionInstantiationProvider(acProvider, acDefinitionProvider, null, null,
+                acmParticipantProvider);
 
         assertThatThrownBy(() -> provider.createAutomationComposition(compositionId, automationComposition))
                 .hasMessageMatching(AC_ELEMENT_NAME_NOT_FOUND);
@@ -262,8 +371,8 @@
         var acProvider = mock(AutomationCompositionProvider.class);
         when(acProvider.getAutomationComposition(automationComposition.getInstanceId()))
                 .thenReturn(automationComposition);
-        var provider = new AutomationCompositionInstantiationProvider(acProvider,
-                mock(AcDefinitionProvider.class), null, null, null);
+        var provider = new AutomationCompositionInstantiationProvider(acProvider, mock(AcDefinitionProvider.class),
+                null, null, null);
 
         var compositionId = automationComposition.getCompositionId();
         assertThatThrownBy(() -> provider.createAutomationComposition(compositionId, automationComposition))
@@ -281,8 +390,8 @@
         var acProvider = mock(AutomationCompositionProvider.class);
         when(acProvider.getAutomationComposition(automationComposition.getInstanceId()))
                 .thenReturn(automationComposition);
-        var provider = new AutomationCompositionInstantiationProvider(acProvider,
-                mock(AcDefinitionProvider.class), null, null, null);
+        var provider = new AutomationCompositionInstantiationProvider(acProvider, mock(AcDefinitionProvider.class),
+                null, null, null);
 
         var compositionId = automationComposition.getCompositionId();
         var wrongCompositionId = UUID.randomUUID();
@@ -315,7 +424,7 @@
         automationComposition.setCompositionId(compositionId);
         assertThatThrownBy(() -> provider.createAutomationComposition(compositionId, automationComposition))
                 .hasMessageMatching("\"AutomationComposition\" INVALID, item has status INVALID\n"
-                        + "  item \"ServiceTemplate\" value \"COMMISSIONED\" INVALID,"
+                        + "  item \"ServiceTemplate.state\" value \"COMMISSIONED\" INVALID,"
                         + " Commissioned automation composition definition not primed\n");
     }
 
@@ -332,8 +441,7 @@
         automationComposition.setCompositionId(compositionId);
         automationComposition.setInstanceId(instanceId);
         var acProvider = mock(AutomationCompositionProvider.class);
-        when(acProvider.getAutomationComposition(instanceId))
-                .thenReturn(automationComposition);
+        when(acProvider.getAutomationComposition(instanceId)).thenReturn(automationComposition);
 
         var supervisionAcHandler = mock(SupervisionAcHandler.class);
         var acmParticipantProvider = mock(AcmParticipantProvider.class);
@@ -367,7 +475,6 @@
         acInstanceStateUpdate.setDeployOrder(DeployOrder.NONE);
         acInstanceStateUpdate.setLockOrder(LockOrder.LOCK);
         provider.compositionInstanceState(compositionId, instanceId, acInstanceStateUpdate);
-        verify(supervisionAcHandler).lock(any(AutomationComposition.class),
-                any(AutomationCompositionDefinition.class));
+        verify(supervisionAcHandler).lock(any(AutomationComposition.class), any(AutomationCompositionDefinition.class));
     }
 }
diff --git a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandlerTest.java b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandlerTest.java
index e441bef..ed8a856 100644
--- a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandlerTest.java
+++ b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/SupervisionParticipantHandlerTest.java
@@ -26,22 +26,34 @@
 import static org.mockito.Mockito.when;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
+import java.util.Set;
 import java.util.UUID;
 import org.junit.jupiter.api.Test;
+import org.onap.policy.clamp.acm.runtime.instantiation.InstantiationUtils;
 import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantDeregisterAckPublisher;
 import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantRegisterAckPublisher;
+import org.onap.policy.clamp.acm.runtime.supervision.comm.ParticipantRestartPublisher;
 import org.onap.policy.clamp.acm.runtime.util.CommonTestData;
+import org.onap.policy.clamp.models.acm.concepts.AcTypeState;
+import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionDefinition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionInfo;
+import org.onap.policy.clamp.models.acm.concepts.NodeTemplateState;
+import org.onap.policy.clamp.models.acm.concepts.Participant;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantSupportedElementType;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantDeregister;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantRegister;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantStatus;
+import org.onap.policy.clamp.models.acm.persistence.provider.AcDefinitionProvider;
 import org.onap.policy.clamp.models.acm.persistence.provider.AutomationCompositionProvider;
 import org.onap.policy.clamp.models.acm.persistence.provider.ParticipantProvider;
 
 class SupervisionParticipantHandlerTest {
+
+    private static final String AC_INSTANTIATION_CREATE_JSON = "src/test/resources/rest/acm/AutomationComposition.json";
+
     @Test
     void testHandleParticipantDeregister() {
         var participant = CommonTestData.createParticipant(CommonTestData.getParticipantId());
@@ -54,9 +66,10 @@
         participantDeregisterMessage.setMessageId(UUID.randomUUID());
         participantDeregisterMessage.setParticipantId(CommonTestData.getParticipantId());
         var participantDeregisterAckPublisher = mock(ParticipantDeregisterAckPublisher.class);
-        var handler = new SupervisionParticipantHandler(participantProvider,
-            mock(ParticipantRegisterAckPublisher.class), participantDeregisterAckPublisher,
-            mock(AutomationCompositionProvider.class));
+        var handler =
+                new SupervisionParticipantHandler(participantProvider, mock(ParticipantRegisterAckPublisher.class),
+                        participantDeregisterAckPublisher, mock(AutomationCompositionProvider.class),
+                        mock(AcDefinitionProvider.class), mock(ParticipantRestartPublisher.class));
 
         handler.handleParticipantMessage(participantDeregisterMessage);
 
@@ -77,8 +90,8 @@
         var participantProvider = mock(ParticipantProvider.class);
         var participantRegisterAckPublisher = mock(ParticipantRegisterAckPublisher.class);
         var handler = new SupervisionParticipantHandler(participantProvider, participantRegisterAckPublisher,
-                mock(ParticipantDeregisterAckPublisher.class),
-                mock(AutomationCompositionProvider.class));
+                mock(ParticipantDeregisterAckPublisher.class), mock(AutomationCompositionProvider.class),
+                mock(AcDefinitionProvider.class), mock(ParticipantRestartPublisher.class));
         handler.handleParticipantMessage(participantRegisterMessage);
 
         verify(participantProvider).saveParticipant(any());
@@ -87,6 +100,58 @@
     }
 
     @Test
+    void testHandleParticipantRestart() {
+        var participantRegisterMessage = new ParticipantRegister();
+        participantRegisterMessage.setMessageId(UUID.randomUUID());
+        var participantId = CommonTestData.getParticipantId();
+        participantRegisterMessage.setParticipantId(participantId);
+        var supportedElementType = new ParticipantSupportedElementType();
+        supportedElementType.setTypeName("Type");
+        supportedElementType.setTypeVersion("1.0.0");
+        participantRegisterMessage.setParticipantSupportedElementType(List.of(supportedElementType));
+
+        var participant = new Participant();
+        participant.setParticipantId(participantId);
+        var participantProvider = mock(ParticipantProvider.class);
+        when(participantProvider.findParticipant(participantId)).thenReturn(Optional.of(participant));
+        var compositionId = UUID.randomUUID();
+        var composition2Id = UUID.randomUUID();
+        when(participantProvider.getCompositionIds(participantId)).thenReturn(Set.of(compositionId, composition2Id));
+
+        var acDefinitionProvider = mock(AcDefinitionProvider.class);
+        var acDefinition = new AutomationCompositionDefinition();
+        acDefinition.setState(AcTypeState.COMMISSIONED);
+        acDefinition.setCompositionId(composition2Id);
+        when(acDefinitionProvider.getAcDefinition(composition2Id)).thenReturn(acDefinition);
+
+        acDefinition = new AutomationCompositionDefinition();
+        acDefinition.setCompositionId(compositionId);
+        acDefinition.setState(AcTypeState.PRIMED);
+        var nodeTemplateState = new NodeTemplateState();
+        nodeTemplateState.setParticipantId(participantId);
+        acDefinition.setElementStateMap(Map.of("code", nodeTemplateState));
+        when(acDefinitionProvider.getAcDefinition(compositionId)).thenReturn(acDefinition);
+
+        var automationComposition =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_CREATE_JSON, "Crud");
+        automationComposition.getElements().values().iterator().next().setParticipantId(participantId);
+        var automationCompositionProvider = mock(AutomationCompositionProvider.class);
+        when(automationCompositionProvider.getAcInstancesByCompositionId(compositionId))
+                .thenReturn(List.of(automationComposition));
+
+        var participantRegisterAckPublisher = mock(ParticipantRegisterAckPublisher.class);
+        var participantRestartPublisher = mock(ParticipantRestartPublisher.class);
+        var handler = new SupervisionParticipantHandler(participantProvider, participantRegisterAckPublisher,
+                mock(ParticipantDeregisterAckPublisher.class), automationCompositionProvider, acDefinitionProvider,
+                participantRestartPublisher);
+        handler.handleParticipantMessage(participantRegisterMessage);
+
+        verify(participantRegisterAckPublisher).send(participantRegisterMessage.getMessageId(), participantId);
+        verify(acDefinitionProvider).updateAcDefinition(any(AutomationCompositionDefinition.class));
+        verify(participantRestartPublisher).send(any(), any(AutomationCompositionDefinition.class), any());
+    }
+
+    @Test
     void testHandleParticipantStatus() {
         var participantStatusMessage = new ParticipantStatus();
         participantStatusMessage.setParticipantId(CommonTestData.getParticipantId());
@@ -98,14 +163,16 @@
         participantStatusMessage.setAutomationCompositionInfoList(List.of(new AutomationCompositionInfo()));
 
         var participantProvider = mock(ParticipantProvider.class);
-        var handler = new SupervisionParticipantHandler(participantProvider,
-            mock(ParticipantRegisterAckPublisher.class), mock(ParticipantDeregisterAckPublisher.class),
-            mock(AutomationCompositionProvider.class));
+        var automationCompositionProvider = mock(AutomationCompositionProvider.class);
+        var handler =
+                new SupervisionParticipantHandler(participantProvider, mock(ParticipantRegisterAckPublisher.class),
+                        mock(ParticipantDeregisterAckPublisher.class), automationCompositionProvider,
+                        mock(AcDefinitionProvider.class), mock(ParticipantRestartPublisher.class));
         var participant = CommonTestData.createParticipant(CommonTestData.getParticipantId());
         when(participantProvider.findParticipant(CommonTestData.getParticipantId()))
                 .thenReturn(Optional.of(participant));
         handler.handleParticipantMessage(participantStatusMessage);
 
-        verify(participantProvider).updateParticipant(any());
+        verify(automationCompositionProvider).upgradeStates(any());
     }
 }
diff --git a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/comm/SupervisionMessagesTest.java b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/comm/SupervisionMessagesTest.java
index 8de5cca..06684d8 100644
--- a/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/comm/SupervisionMessagesTest.java
+++ b/runtime-acm/src/test/java/org/onap/policy/clamp/acm/runtime/supervision/comm/SupervisionMessagesTest.java
@@ -222,6 +222,31 @@
     }
 
     @Test
+    void testParticipantRestartPublisher() {
+        var publisher = new ParticipantRestartPublisher();
+        var topicSink = mock(TopicSink.class);
+        publisher.active(List.of(topicSink));
+
+        var serviceTemplate = InstantiationUtils.getToscaServiceTemplate(TOSCA_SERVICE_TEMPLATE_YAML);
+        // serviceTemplate.setName("Name");
+        // serviceTemplate.setVersion("1.0.0");
+        var acmDefinition = new AutomationCompositionDefinition();
+        acmDefinition.setCompositionId(UUID.randomUUID());
+        acmDefinition.setServiceTemplate(serviceTemplate);
+        var acElements = AcmUtils.extractAcElementsFromServiceTemplate(serviceTemplate);
+        acmDefinition.setElementStateMap(AcmUtils.createElementStateMap(acElements, AcTypeState.PRIMED));
+
+        var automationComposition =
+                InstantiationUtils.getAutomationCompositionFromResource(AC_INSTANTIATION_UPDATE_JSON, "Crud");
+
+        var participantId = automationComposition.getElements().values().iterator().next().getParticipantId();
+        acmDefinition.getElementStateMap().values().iterator().next().setParticipantId(participantId);
+
+        publisher.send(participantId, acmDefinition, List.of(automationComposition));
+        verify(topicSink).send(anyString());
+    }
+
+    @Test
     void testParticipantRegisterListener() {
         final var participantRegister = new ParticipantRegister();
         var supervisionHandler = mock(SupervisionParticipantHandler.class);