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Type: Bug
Resolution: Done
Priority: Major
Fix Version/s: AMQ 7.2.2.GA
Affects Version/s: AMQ 7.2.0.GA
Component/s: clustering
Labels:
None

GSS Priority:
Target Release:

AMQ 7.2.2.GA
Upstream Jira:
https://issues.apache.org/jira/browse/ARTEMIS-2093
Git Pull Request:
https://github.com/rh-messaging/activemq-artemis/pull/105

Sprint:
AMQ Broker 1839

SFDC Cases Counter:
SFDC Cases Open:
SFDC Cases Links:

The following NPE occasionally occurs on a remote broker after one of the brokers in the cluster fails over from master to salve:

2018-08-20 17:21:43,192 WARN  [org.apache.activemq.artemis.core.client] AMQ212007: connector.create or connectorFactory.createConnector should never throw an exception, implementation is badly behaved, but we will deal with it anyway.: java.lang.NullPointerException
        at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector.createConnection(NettyConnector.java:800) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.openTransportConnection(ClientSessionFactoryImpl.java:1040) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.createTransportConnection(ClientSessionFactoryImpl.java:1080) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.establishNewConnection(ClientSessionFactoryImpl.java:1290) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.getConnection(ClientSessionFactoryImpl.java:895) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.getConnectionWithRetry(ClientSessionFactoryImpl.java:799) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.reconnectSessions(ClientSessionFactoryImpl.java:748) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.failoverOrReconnect(ClientSessionFactoryImpl.java:618) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:508) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.handleConnectionFailure(ClientSessionFactoryImpl.java:501) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.client.impl.ClientSessionFactoryImpl.connectionException(ClientSessionFactoryImpl.java:372) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector$Listener$2.run(NettyConnector.java:1073) [artemis-core-client-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:42) [artemis-commons-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:31) [artemis-commons-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at org.apache.activemq.artemis.utils.actors.ProcessorBase.executePendingTasks(ProcessorBase.java:66) [artemis-commons-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_181]
        at org.apache.activemq.artemis.utils.ActiveMQThreadFactory$1.run(ActiveMQThreadFactory.java:118) [artemis-commons-2.6.1.amq-720004-redhat-1.jar:2.6.1.amq-720004-redhat-1]

In most cases when the AMQ212007 occurs the full stack above is printed however, there are also instances where no stack trace is printed:

2018-08-20 17:16:00,637 WARN  [org.apache.activemq.artemis.core.client] AMQ212007: connector.create or connectorFactory.createConnector should never throw an exception, implementation is badly behaved, but we will deal with it anyway.: java.lang.NullPointerException

2018-08-20 17:16:07,298 WARN  [org.apache.activemq.artemis.core.client] AMQ212007: connector.create or connectorFactory.createConnector should never throw an exception, implementation is badly behaved, but we will deal with it anyway.: java.lang.NullPointerException

2018-08-20 17:16:11,306 WARN  [org.apache.activemq.artemis.core.client] AMQ212007: connector.create or connectorFactory.createConnector should never throw an exception, implementation is badly behaved, but we will deal with it anyway.: java.lang.NullPointerException

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