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https://issues.apache.org/jira/browse/HIVE-20138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16541119#comment-16541119
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Sergey Shelukhin commented on HIVE-20138:
-----------------------------------------
Looks like a dup of HIVE-19777
> Sessions: Closing Tez sessions if opened outside of default sessions throws
> NPE
> -------------------------------------------------------------------------------
>
> Key: HIVE-20138
> URL: https://issues.apache.org/jira/browse/HIVE-20138
> Project: Hive
> Issue Type: Bug
> Components: Tez
> Reporter: Gopal V
> Priority: Major
>
> On a busy cluster, if a session is currently in ACCEPTED state (i.e YARN
> hasn't started it yet), running a query will NPE.
> {code}
> java.lang.NullPointerException: null
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.getSession(TezSessionState.java:711)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionState.close(TezSessionState.java:646)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.closeIfNotDefault(TezSessionPoolManager.java:353)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.TezSessionPoolManager.getSession(TezSessionPoolManager.java:467)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.WorkloadManagerFederation.getUnmanagedSession(WorkloadManagerFederation.java:66)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.WorkloadManagerFederation.getSession(WorkloadManagerFederation.java:38)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.ql.exec.tez.TezTask.execute(TezTask.java:184)
> ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> {code}
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