[AMQ-7353] Rare NPE during marshal, killing async dispatch task and potentially leaving un-marshal cache invalid

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.15.0
• Fix Version/s: 5.16.0
• Component/s: Broker, Transport
• Assignee: Gary Tully
• Reporter: Gary Tully
• Created: 26/Nov/19 16:41
• Updated: 23/Oct/20 09:45
• Resolved: 26/Nov/19 17:04

Description

On occasion the following NPE occurs:

Error in thread 'ActiveMQ BrokerService[..] Task-243' Class org.apache.activemq.thread.TaskRunnerFactory$1$1
Method uncaughtException
Throwable java.lang.NullPointerException
	at java.lang.System.arraycopy(Native Method)
	at org.apache.activemq.transport.nio.NIOOutputStream.write(NIOOutputStream.java:113)
	at java.io.DataOutputStream.write(DataOutputStream.java:107)
	at org.apache.activemq.openwire.v10.BaseDataStreamMarshaller.tightMarshalByteSequence2(BaseDataStreamMarshaller.java:431)
	at org.apache.activemq.openwire.v10.MessageMarshaller.tightMarshal2(MessageMarshaller.java:183)
	at org.apache.activemq.openwire.v10.ActiveMQMessageMarshaller.tightMarshal2(ActiveMQMessageMarshaller.java:89)
	at org.apache.activemq.openwire.v10.ActiveMQBytesMessageMarshaller.tightMarshal2(ActiveMQBytesMessageMarshaller.java:89)
	at org.apache.activemq.openwire.OpenWireFormat.tightMarshalNestedObject2(OpenWireFormat.java:417)
	at org.apache.activemq.openwire.v10.BaseDataStreamMarshaller.tightMarshalNestedObject2(BaseDataStreamMarshaller.java:135)
	at org.apache.activemq.openwire.v10.MessageDispatchMarshaller.tightMarshal2(MessageDispatchMarshaller.java:105)
	at org.apache.activemq.openwire.OpenWireFormat.marshal(OpenWireFormat.java:227)
	at org.apache.activemq.transport.tcp.TcpTransport.oneway(TcpTransport.java:175)
	at org.apache.activemq.transport.AbstractInactivityMonitor.doOnewaySend(AbstractInactivityMonitor.java:335)
	at org.apache.activemq.transport.AbstractInactivityMonitor.oneway(AbstractInactivityMonitor.java:317)
	at org.apache.activemq.transport.TransportFilter.oneway(TransportFilter.java:85)
	at org.apache.activemq.transport.WireFormatNegotiator.oneway(WireFormatNegotiator.java:116)
	at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:68)
	at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1456)
	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:966)
	at org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:1016)
	at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:133)
	at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:48)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
	

Issue Links

• causes: AMQ-7245 ActiveMQ is throwing ClassCastExceptions inside the client library