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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-14003) queries running against llap hang at times - preemption issues
Date Mon, 13 Jun 2016 16:22:21 GMT

    [ 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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