To configure a MR Log4J appender the following parameters are available:
(R) Topic [String] - The topic which you wish to publish your log messages to (R) Partition [String]- The partition within the Topic that you wish you publish your log messages to (R) Hosts [String]- A comma separated string containing the MR API server nodes you wish to connect to (O) MaxBatchSize [Integer] - The maximum size of the batch of log messages. When the batch grows larger than this, the messages are flushed to the topic/partition. (O) MaxAgeMs [Integer] - The maximum age in milliseconds of the batch. When the batch age is older than this, the messages are flushed to the topic/partition. (O) Compress [Boolean] - Indicates whether you would like your messages compressed or not.
An example can be found in ./src/main/resources/log4j.xml