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https://issues.apache.org/jira/browse/HIVE-14003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15329052#comment-15329052
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Siddharth Seth commented on HIVE-14003:
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[~hagleitn] - mind taking a look at the patch, and providing some more
information on dummyOps / mergeOps.
An interrupt would ideally stop an opeartion - however it's really a
suggestion, and we cannot rely on libraries to handle them correctly. I suspect
most of Hadoop has issues here. An HDFS jira was created and has already been
fixed.
The abort flag serves to protect against operations which reset the interrupt
status - which is where the avoid blocking op comment comes in. In most cases
we'll be OK, with an abort flag check.
> queries running against llap hang at times - preemption issues
> --------------------------------------------------------------
>
> Key: HIVE-14003
> URL: https://issues.apache.org/jira/browse/HIVE-14003
> Project: Hive
> Issue Type: Bug
> Components: llap
> Affects Versions: 2.1.0
> Reporter: Takahiko Saito
> Assignee: Siddharth Seth
> Attachments: HIVE-14003.01.patch
>
>
> The preemption logic in the Hive processor needs some more work. There are
> definitely windows where the abort flag is completely dropped within the Hive
> processor.
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