Blocker Description
This is a recent change in Artemis master branch.
The org.apache.activemq.artemis.utils package whose source files are in artemis-commons are also present in the artemis-server jar.
$ find . -name ExecutorFactory.java ./artemis-commons/src/main/java/org/apache/activemq/artemis/utils/ExecutorFactory.java $ jar tvf artemis-commons/target/artemis-commons-2.5.0-SNAPSHOT.jar | grep ExecutorFactory 2335 Wed Feb 14 09:30:54 CET 2018 org/apache/activemq/artemis/utils/actors/OrderedExecutorFactory.class 230 Wed Feb 14 09:30:54 CET 2018 org/apache/activemq/artemis/utils/ExecutorFactory.class $ jar tvf artemis-server/target/artemis-server-2.5.0-SNAPSHOT.jar | grep ExecutorFactory 230 Wed Feb 14 09:30:54 CET 2018 org/apache/activemq/artemis/utils/ExecutorFactory.class
This causes issue when we integrate Artemis on our application server that is using a modular class loader as there are 2 definitions of the ExecutorFactory class and we end up with weird errors such as:
12:02:16,754 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 68) MSC000001: Failed to start service jboss.messaging-activemq.default.jms.manager: org.jboss.msc.service.StartException in service jboss.messaging-activemq.default.jms.manager: java.lang.IncompatibleClassChangeError: Class org.apache.activemq.artemis.utils.actors.OrderedExecutorFactory does not implement the requested interface org.apache.activemq.artemis.utils.ExecutorFactory at org.wildfly.extension.messaging.activemq.jms.JMSService.doStart(JMSService.java:209) at org.wildfly.extension.messaging.activemq.jms.JMSService.access$000(JMSService.java:64) at org.wildfly.extension.messaging.activemq.jms.JMSService$1.run(JMSService.java:99) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1979) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1481) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1348) at java.lang.Thread.run(Thread.java:745) at org.jboss.threads.JBossThread.run(JBossThread.java:485) Caused by: java.lang.IncompatibleClassChangeError: Class org.apache.activemq.artemis.utils.actors.OrderedExecutorFactory does not implement the requested interface org.apache.activemq.artemis.utils.ExecutorFactory at org.apache.activemq.artemis.core.persistence.impl.journal.AbstractJournalStorageManager.<init>(AbstractJournalStorageManager.java:222) at org.apache.activemq.artemis.core.persistence.impl.journal.JournalStorageManager.<init>(JournalStorageManager.java:106) at org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.createStorageManager(ActiveMQServerImpl.java:2151) at org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.initialisePart1(ActiveMQServerImpl.java:2287) at org.apache.activemq.artemis.core.server.impl.LiveOnlyActivation.run(LiveOnlyActivation.java:63) at org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.internalStart(ActiveMQServerImpl.java:522) at org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl.start(ActiveMQServerImpl.java:461) at org.apache.activemq.artemis.jms.server.impl.JMSServerManagerImpl.start(JMSServerManagerImpl.java:392) at org.wildfly.extension.messaging.activemq.jms.JMSService.doStart(JMSService.java:205) ... 9 more
This happens because the ActiveMQServerImpl is referencing the ExecutorFactory class from artemis-server jar while the OrderedExecutorFactory class is referencing the ExecutorFactory class from artemis-commons.
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