Hi, I'm getting occasional ActiveMQIllegalStateException in Artemis server log. Artemis has been deployed in a single instance setup and I'm connecting using the core API. I've a single queue with one producer and 10 consumers. The messages can be rather large but the volume has been quite low. Here's a log extract:
13:51:37,340 ERROR [org.apache.activemq.artemis.core.server] AMQ224016: Caught exception: ActiveMQIllegalStateException[errorType=ILLEGAL_STATE message=AMQ119027: Could not find reference on consumer ID=0, messageId = 1,535 queue = foo.bar.requests] at org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.acknowledge(ServerConsumerImpl.java:850) [artemis-server-2.2.0.jar:2.2.0] at org.apache.activemq.artemis.core.server.impl.ServerSessionImpl.acknowledge(ServerSessionImpl.java:773) [artemis-server-2.2.0.jar:2.2.0] at org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.onSessionAcknowledge(ServerSessionPacketHandler.java:629) [artemis-server-2.2.0.jar:2.2.0] at org.apache.activemq.artemis.core.protocol.core.ServerSessionPacketHandler.onMessagePacket(ServerSessionPacketHandler.java:267) [artemis-server-2.2.0.jar:2.2.0] at org.apache.activemq.artemis.utils.actors.Actor.doTask(Actor.java:33) [artemis-commons-2.2.0.jar:2.2.0] ... Any ideas on what could be causing this? Artemis has been deployed on Ubuntu 16.04 server and running with Oracle Java 8. The code is demonstrated in a sample here: https://gist.github.com/marko-asplund/983300e4bec59f53a13bc0d319a506f6 marko