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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13855) Race in multi threaded PartitionedMobCompactor causes NPE
Date Wed, 22 Jul 2015 22:49:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14637801#comment-14637801
] 

Hudson commented on HBASE-13855:
--------------------------------

FAILURE: Integrated in HBase-TRUNK #6672 (See [https://builds.apache.org/job/HBase-TRUNK/6672/])
HBASE-13855 Race in multi threaded PartitionedMobCompactor causes NPE. (Jingcheng) (anoopsamjohn:
rev faefb9073f388663df91d0ef2db24b00d6512519)
* hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/PartitionedMobCompactor.java


> Race in multi threaded PartitionedMobCompactor causes NPE
> ---------------------------------------------------------
>
>                 Key: HBASE-13855
>                 URL: https://issues.apache.org/jira/browse/HBASE-13855
>             Project: HBase
>          Issue Type: Sub-task
>          Components: mob
>    Affects Versions: hbase-11339
>            Reporter: Jingcheng Du
>            Assignee: Jingcheng Du
>            Priority: Critical
>             Fix For: hbase-11339
>
>         Attachments: HBASE-13855.diff
>
>
> In PartitionedMobCompactor, mob files are split into partitions, the compactions of partitions
run in parallel.
> The partitions share  the same set of del files. There might be race conditions when
open readers of del store files in each partition which can cause NPE.
> In this patch, we will pre-create the reader for each del store file to avoid this issue.



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