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https://issues.apache.org/jira/browse/ARTEMIS-5598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Clebert Suconic closed ARTEMIS-5598.
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> Mitigate race condition on ServerConsumer callback
> --------------------------------------------------
>
> Key: ARTEMIS-5598
> URL: https://issues.apache.org/jira/browse/ARTEMIS-5598
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Reporter: Justin Bertram
> Assignee: Justin Bertram
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.43.0
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> There is a race condition in {{ServerConsumerImpl}} involving {{callback}}
> which can result in a {{NullPointerException}}, e.g.:
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl.proceedDeliver(ServerConsumerImpl.java:532)
> at
> org.apache.activemq.artemis.core.server.impl.ServerConsumerImpl$BrowserDeliverer.run(ServerConsumerImpl.java:1488)
> at
> org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:57)
> at
> org.apache.activemq.artemis.utils.actors.OrderedExecutor.doTask(OrderedExecutor.java:32)
> at
> org.apache.activemq.artemis.utils.actors.ProcessorBase.executePendingTasks(ProcessorBase.java:68)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at
> org.apache.activemq.artemis.utils.ActiveMQThreadFactory$1.run(ActiveMQThreadFactory.java:118){noformat}
> The race happens when a message is being delivered at the same time the
> consumer is closed.
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