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Posted to yarn-issues@hadoop.apache.org by "chaosju (Jira)" <ji...@apache.org> on 2021/06/04 09:47:00 UTC
[jira] [Commented] (YARN-10806) Dispatcher thread crash caused by
NoSuchElementException
[ https://issues.apache.org/jira/browse/YARN-10806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17357225#comment-17357225 ]
chaosju commented on YARN-10806:
--------------------------------
I dont know why rmApp.getAppAttempts() is empty？
> Dispatcher thread crash caused by NoSuchElementException
> ---------------------------------------------------------
>
> Key: YARN-10806
> URL: https://issues.apache.org/jira/browse/YARN-10806
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.1.2
> Reporter: chaosju
> Priority: Major
>
> line 1091： RMAppAttempt previousFailedAttempt = rmApp.getAppAttempts().values().iterator().next();
> if rmApp.getAppAttempts() is empty , the values().iterator().next() will throw java.util.NoSuchElementException;
> Error Stack：
> 2021-06-03 08:18:18,586 FATAL org.apache.hadoop.yarn.event.AsyncDispatcher: Error in dispatcher thread
> java.util.NoSuchElementException
> at java.base/java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:721)
> at java.base/java.util.LinkedHashMap$LinkedValueIterator.next(LinkedHashMap.java:746)
> at java.base/java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1047)
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:1091)
> at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:1055)
> at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:219)
> at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:133)
> at java.base/java.lang.Thread.run(Thread.java:834)
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