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https://issues.apache.org/jira/browse/AMBARI-3703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleksandr Diachenko updated AMBARI-3703:
----------------------------------------
Attachment: AMBARI-3703.patch
> ConcurrentModificationException in Ambari Server log
> ----------------------------------------------------
>
> Key: AMBARI-3703
> URL: https://issues.apache.org/jira/browse/AMBARI-3703
> Project: Ambari
> Issue Type: Task
> Components: controller, test
> Affects Versions: 1.4.1
> Reporter: Oleksandr Diachenko
> Assignee: Oleksandr Diachenko
> Fix For: 1.4.2
>
> Attachments: AMBARI-3703.patch
>
>
> This is an unlikely repro. However, we can go through the code to see if we
> can find out possible cause.
> {code}
> 01:56:26,714 WARN [Thread-2] HeartbeatMonitor:98 - Exception received
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.ambari.server.agent.HeartbeatMonitor.generateStatusCommands(HeartbeatMonitor.java:185)
> at
> org.apache.ambari.server.agent.HeartbeatMonitor.doWork(HeartbeatMonitor.java:164)
> at
> org.apache.ambari.server.agent.HeartbeatMonitor.run(HeartbeatMonitor.java:90)
> at java.lang.Thread.run(Thread.java:662)
> {code}
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