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https://issues.apache.org/jira/browse/FLINK-7201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16107033#comment-16107033
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ASF GitHub Bot commented on FLINK-7201:
---------------------------------------
Github user XuPingyong closed the pull request at:
https://github.com/apache/flink/pull/4347
> ConcurrentModificationException in JobLeaderIdService
> -----------------------------------------------------
>
> Key: FLINK-7201
> URL: https://issues.apache.org/jira/browse/FLINK-7201
> Project: Flink
> Issue Type: Bug
> Components: JobManager
> Reporter: Xu Pingyong
> Assignee: Xu Pingyong
> Labels: flip-6
> Fix For: 1.4.0
>
>
> {code:java}
> java.util.ConcurrentModificationException: null
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
> at java.util.HashMap$ValueIterator.next(HashMap.java:950)
> at
> org.apache.flink.runtime.resourcemanager.JobLeaderIdService.clear(JobLeaderIdService.java:114)
> at
> org.apache.flink.runtime.resourcemanager.JobLeaderIdService.stop(JobLeaderIdService.java:92)
> at
> org.apache.flink.runtime.resourcemanager.ResourceManager.shutDown(ResourceManager.java:200)
> at
> org.apache.flink.runtime.resourcemanager.ResourceManagerRunner.shutDownInternally(ResourceManagerRunner.java:102)
> at
> org.apache.flink.runtime.resourcemanager.ResourceManagerRunner.shutDown(ResourceManagerRunner.java:97)
> at
> org.apache.flink.runtime.minicluster.MiniCluster.shutdownInternally(MiniCluster.java:329)
> at
> org.apache.flink.runtime.minicluster.MiniCluster.shutdown(MiniCluster.java:297)
> at
> org.apache.flink.runtime.minicluster.MiniClusterITCase.runJobWithMultipleJobManagers(MiniClusterITCase.java:85)
> {code}
> Because the jobLeaderIdService stops before the rpcService when shutdown the
> resourceManager, jobLeaderIdService has a risk of thread-unsafe.
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