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https://issues.apache.org/jira/browse/HIVE-21033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Szehon Ho updated HIVE-21033:
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Summary: Sudden disconnect for a session with set and SQL operation cuts
off any more HiveServer2 output (was: Sudden disconnect for a session with set
and SQL operation cuts off any more HiveServer2 logs)
> Sudden disconnect for a session with set and SQL operation cuts off any more
> HiveServer2 output
> -----------------------------------------------------------------------------------------------
>
> Key: HIVE-21033
> URL: https://issues.apache.org/jira/browse/HIVE-21033
> Project: Hive
> Issue Type: Bug
> Reporter: Szehon Ho
> Priority: Major
>
> Its a bit tricky to reproduce, but we were able to do it (unfortunately) with
> our custom client that did not handle closing the session on the error case.
> But it may also happen for any client that just disconnects in the middle of
> this operation.
> Basically you have a session with both HiveCommandOperation and SQLOperation.
> For example a session that does the operations (set a=b; select * from
> foobar; ).
> The SQLOperation runs last and set SessionState.out and err to be System.out
> and System.err . Ref:
> [SQLOperation#setupSessionIO|https://github.com/apache/hive/blob/master/service/src/java/org/apache/hive/service/cli/operation/SQLOperation.java#L139]
> Then the client terminates without closing the session. (In our case, a
> SemanticException triggered it). The deleteContext is called, which closes
> the session: Ref
> [ThriftBinaryCLIService#deleteContext|https://github.com/apache/hive/blob/f37c5de6c32b9395d1b34fa3c02ed06d1bfbf6eb/service/src/java/org/apache/hive/service/cli/thrift/ThriftBinaryCLIService.java#L141]
> The Session closes all the operations, starting with HiveCommandOperation.
> This one closes all the streams, which it assumes is System.out and
> System.err as set by SQLOperation earlier. Ref:
> [HiveCommandOperation#tearDownSessionIO|https://github.com/apache/hive/blob/f37c5de6c32b9395d1b34fa3c02ed06d1bfbf6eb/service/src/java/org/apache/hive/service/cli/operation/HiveCommandOperation.java#L101]
>
> After this, no more HiveServer2 output appears as System.out and System.err
> are closed.
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