HornetQ streaming big StreamMessages causes 'OutOfMemoryError: Java heap space'

Environment

• JBoss Service Oriented Architecture Platform (SOA-P)

Issue

• The Java heap dump shows the largest retention under a thread that with the same names as the thread associated with the OutOfMemoryError in the JBoss server.log.
• Retention in org.jboss.netty.buffer.BigEndianHeapChannelBuffer byte array.
• Java heap dump created by the JVM with -XX:+HeapDumpOnOutOfMemoryError option is significantly smaller than the max heap size (-Xmx).
• Heap dump analysis shows the retention is a byte array.

Resolution

Increase the heap size. The byte array is too small and tries to allocate a larger buffer and cannot. This results in a heap dump created that is much smaller than the maximum heap size Xmx.

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