[jira] [Created] (ARTEMIS-3728) Failed to deliver: java.lang.NullPointerException

["Stephen Baker (Jira)" <ji...@apache.org>]

Stephen Baker created ARTEMIS-3728:
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             Summary: Failed to deliver: java.lang.NullPointerException
                 Key: ARTEMIS-3728
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-3728
             Project: ActiveMQ Artemis
          Issue Type: Bug
    Affects Versions: 2.20.0
         Environment: centos 7

Corretto JDK 11

Artemis 2.20.0 (with epoll module)

 
            Reporter: Stephen Baker
         Attachments: artemis-1.profile-artms1, broker-1.xml-artms1

Seeing the following error in the logs on one of our artemis servers repeatedly since last night:
2022-03-17 00:02:20,434 ERROR [org.apache.activemq.artemis.core.server] AMQ224041: Failed to deliver: java.lang.NullPointerException
	at org.apache.activemq.artemis.utils.collections.LinkedListImpl.addTail(LinkedListImpl.java:141) [artemis-commons-2.20.0.jar:]
	at org.apache.activemq.artemis.utils.collections.PriorityLinkedListImpl.addTail(PriorityLinkedListImpl.java:84) [artemis-commons-2.20.0.jar:]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.internalAddTail(QueueImpl.java:2877) [artemis-server-2.20.0.jar:2.20.0]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.doInternalPoll(QueueImpl.java:2938) [artemis-server-2.20.0.jar:2.20.0]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl.deliver(QueueImpl.java:2963) [artemis-server-2.20.0.jar:2.20.0]
	at org.apache.activemq.artemis.core.server.impl.QueueImpl$DeliverRunner.run(QueueImpl.java:4205) [artemis-server-2.20.0.jar:2.20.0]
	at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:42) [artemis-commons-2.20.0.jar:]
	at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:31) [artemis-commons-2.20.0.jar:]
	at org.apache.activemq.artemis.utils.actors.ProcessorBase.executePendingTasks(ProcessorBase.java:65) [artemis-commons-2.20.0.jar:]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [java.base:]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [java.base:]
	at org.apache.activemq.artemis.utils.ActiveMQThreadFactory$1.run(ActiveMQThreadFactory.java:118) [artemis-commons-2.20.0.jar:]
I don't know how it started or how to reproduce but I can say that we switched to dual mirroring last night per the current documentation at: [https://activemq.apache.org/components/artemis/documentation/latest/amqp-broker-connections.html]

In the process we renamed our mirrors (before they had the same name on each side), and deleted the old mirror queues through the management console after all of the servers were up. We did this on 4 other pairs (all separate clusters) without running into this issue.

These errors are coming only from the live server on the disaster recovery site, which has no consumers except the mirror connection.

Prior to these errors we did have:

2022-03-16 23:52:29,482 WARN [org.apache.activemq.artemis.protocol.amqp.connect.mirror.AMQPMirrorControllerTarget] Queue $ACTIVEMQ_ARTEMIS_MIRROR_Mirror not found on mirror target, ignoring ack for queue=$ACTIVEMQ_ARTEMIS_MIRROR_Mirror, messageID=63165878649, nodeID=dea32b83-efd5-11eb-b5b1-0050568fe3b2



in our logs, where that mirror name is the old shared mirror name (not part of the current broker.xml).

Error does not appear to have come back on a restart of the server.



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