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https://issues.apache.org/jira/browse/HIVE-22527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17047871#comment-17047871
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Naveen Gangam commented on HIVE-22527:
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Thanks for the new patch [~zhangbutao]. Patch looks good to me. So +1.
> Hive on Tez : Job of merging samll files will be submitted into another queue
> (default queue)
> ---------------------------------------------------------------------------------------------
>
> Key: HIVE-22527
> URL: https://issues.apache.org/jira/browse/HIVE-22527
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.1.0, 3.1.1
> Reporter: zhangbutao
> Assignee: zhangbutao
> Priority: Blocker
> Fix For: 3.1.0
>
> Attachments: HIVE-22527-branch-3.1.0.patch, HIVE-22527.01.patch,
> explain with merge files.png, file merge job.png, hive logs.png
>
>
> Hive on Tez. We enable small file merge configuration with set
> *hive.merge.tezfiles=true*. So , There will be another job launched for
> merging files after sql job. However, the merge file job is submitted into
> another yarn queue, not the queue of current beeline client session. It seems
> that the merging files job start a new tez session with new conf which is
> different the current session conf, leading to the merging file job goes into
> default queue.
>
> Attachment *hive logs.png* shows that current session queue is
> *root.bdoc.production* ( String queueName = session.getQueueName();) incoming
> queue name is *null* ( String confQueueName =
> conf.get(TezConfiguration.TEZ_QUEUE_NAME);). In fact, we log in to the same
> beeline client with *set tez.queue.name=* *root.bdoc.production,* and all
> jobs should be submitted into the same queue including file merge job.
> [https://github.com/apache/hive/blob/bcc7df95824831a8d2f1524e4048dfc23ab98c19/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezSessionPoolManager.java#L445]
> [https://github.com/apache/hive/blob/bcc7df95824831a8d2f1524e4048dfc23ab98c19/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezSessionPoolManager.java#L446]
>
> Attachment *explain with merge files.png* shows that ** the stage-4 is
> individual merge file job which is submitted into another yarn queue（default
> queue）， not the queue root.bdoc.production.
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