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Date: Mon, 13 Jun 2016 16:22:21 +0000 (UTC)
From: "Siddharth Seth (JIRA)" <jira@apache.org>
To: issues@hive.apache.org
Message-ID: <JIRA.12978186.1465830806000.71477.1465834941151@Atlassian.JIRA>
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Subject: [jira] [Comment Edited] (HIVE-14003) queries running against llap
 hang at times - preemption issues
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archived-at: Mon, 13 Jun 2016 16:22:23 -0000


    [ https://issues.apache.org/jira/browse/HIVE-14003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15327672#comment-15327672 ] 

Siddharth Seth edited comment on HIVE-14003 at 6/13/16 4:21 PM:
----------------------------------------------------------------

Patch to fix the issue mentioned below.

I've left some TODOs in the code, which will likely be fixed in subsequent jiras. Need information from someone more familiar with the code. (Some of the comments read TODO: reviewer - those specifically need more info, ideally on RB)

Any operation which can block - e.g. processorContext.waitTillReady within the hive codebase has the potential to lead to problems like this. To be fixed in subsequent jiras. Some have been identified in the patch.

cc [~prasanth_j], [~sershe]


was (Author: sseth):
Patch to fix the issue mentioned below.

I've left some TODOs in the code, which will likely be fixed in subsequent jiras. Need information from someone more familiar with the code. (Some of the comments read TODO: reviewer - those specifically need more info, ideally on RB)

cc [~prasanth_j], [~sershe]


> 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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