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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-4214) Scans which write should not block region split or close
Date Fri, 29 Sep 2017 22:15:01 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-4214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16186587#comment-16186587
] 

Hudson commented on PHOENIX-4214:
---------------------------------

FAILURE: Integrated in Jenkins build Phoenix-master #1825 (See [https://builds.apache.org/job/Phoenix-master/1825/])
Revert "PHOENIX-4214 Scans which write should not block region split or (jtaylor: rev f4e51143a35bdd48f025b925c9988f98de92a4c3)
* (edit) phoenix-core/src/main/java/org/apache/phoenix/coprocessor/UngroupedAggregateRegionObserver.java
* (edit) phoenix-core/src/it/java/org/apache/phoenix/execute/UpsertSelectOverlappingBatchesIT.java
PHOENIX-4214 Scans which write should not block region split or close (jtaylor: rev f00380ef79795a675cfa5b50082147a273ac26f9)
* (edit) phoenix-core/src/main/java/org/apache/phoenix/coprocessor/UngroupedAggregateRegionObserver.java
* (edit) phoenix-core/src/it/java/org/apache/phoenix/execute/UpsertSelectOverlappingBatchesIT.java


> Scans which write should not block region split or close
> --------------------------------------------------------
>
>                 Key: PHOENIX-4214
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4214
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.12.0
>            Reporter: Vincent Poon
>            Assignee: Vincent Poon
>             Fix For: 4.12.0
>
>         Attachments: PHOENIX-4214-0.98-v2.patch, PHOENIX-4214-4.x-HBase-0.98_v1.patch,
PHOENIX-4214.master.v1.patch, PHOENIX-4214.master.v2.patch, splitDuringUpsertSelect_wip.patch
>
>
> PHOENIX-3111 introduced a scan reference counter which is checked during region preSplit
and preClose.  However, a steady stream of UPSERT SELECT or DELETE can keep the count above
0 indefinitely, preventing or greatly delaying a region split or close.
> We should try to avoid starvation of the split / close request, and fail/reject queries
where appropriate.



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