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https://issues.apache.org/jira/browse/HIVE-24294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-24294 started by Naresh P R.
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> TezSessionPool sessions can throw AssertionError
> ------------------------------------------------
>
> Key: HIVE-24294
> URL: https://issues.apache.org/jira/browse/HIVE-24294
> Project: Hive
> Issue Type: Bug
> Reporter: Naresh P R
> Assignee: Naresh P R
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Whenever default TezSessionPool sessions are reopened for some reason, we are
> setting dagResources to null before close & setting it back in openWhenever
> default TezSessionPool sessions are reopened for some reason, we are setting
> dagResources to null before close & setting it back in open
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezSessionPoolManager.java#L498-L503
> If there is an exception in sessionState.close(), we are not restoring the
> dagResource but moving the session back to TezSessionPool.eg., exception
> trace when sessionState.close() failed
> {code:java}
> 2020-10-15T09:20:28,749 INFO [HiveServer2-Background-Pool: Thread-25451]:
> client.TezClient (:()) - Failed to shutdown Tez Session via proxy
> org.apache.tez.dag.api.SessionNotRunning: Application not running,
> applicationId=application_1602093123456_12345, yarnApplicationState=FINISHED,
> finalApplicationStatus=SUCCEEDED,
> trackingUrl=http://localhost:8088/proxy/application_1602093123456_12345/,
> diagnostics=Session timed out, lastDAGCompletionTime=1602997683786 ms,
> sessionTimeoutInterval=600000 ms
> Session stats:submittedDAGs=2, successfulDAGs=2, failedDAGs=0, killedDAGs=0
> at
> org.apache.tez.client.TezClientUtils.getAMProxy(TezClientUtils.java:910)
> at org.apache.tez.client.TezClient.getAMProxy(TezClient.java:1060)
> at org.apache.tez.client.TezClient.stop(TezClient.java:743)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.closeClient(TezSessionState.java:789)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.close(TezSessionState.java:756)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolSession.close(TezSessionPoolSession.java:111)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.reopenInternal(TezSessionPoolManager.java:496)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.reopen(TezSessionPoolManager.java:487)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolSession.reopen(TezSessionPoolSession.java:228)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezTask.getNewTezSessionOnError(TezTask.java:531)
>
> at
> org.apache.hadoop.hive.ql.exec.tez.TezTask.submit(TezTask.java:546)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezTask.execute(TezTask.java:221){code}
> Because of this, all new queries using this corrupted sessions are failing
> with below exception
> {code:java}
> Caused by: java.lang.AssertionError: Ensure called on an unitialized (or
> closed) session 41774265-b7da-4d58-84a8-1bedfd597aecCaused by:
> java.lang.AssertionError: Ensure called on an unitialized (or closed) session
> 41774265-b7da-4d58-84a8-1bedfd597aec at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.ensureLocalResources(TezSessionState.java:685){code}
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