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https://issues.apache.org/jira/browse/HBASE-21395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16675433#comment-16675433
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Hudson commented on HBASE-21395:
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Results for branch branch-2.1
        [build #580 on 
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/580/]: 
(x) *{color:red}-1 overall{color}*
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details (if available):

(/) {color:green}+1 general checks{color}
-- For more information [see general 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/580//General_Nightly_Build_Report/]




(/) {color:green}+1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2) 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/580//JDK8_Nightly_Build_Report_(Hadoop2)/]


(x) {color:red}-1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3) 
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/580//JDK8_Nightly_Build_Report_(Hadoop3)/]


(/) {color:green}+1 source release artifact{color}
-- See build output for details.


(/) {color:green}+1 client integration test{color}


> Abort split/merge procedure if there is a table procedure of the same table 
> going on
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-21395
>                 URL: https://issues.apache.org/jira/browse/HBASE-21395
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.1.0, 2.0.2
>            Reporter: Allan Yang
>            Assignee: Allan Yang
>            Priority: Major
>             Fix For: 2.0.3, 2.1.2
>
>         Attachments: HBASE-21395.branch-2.0.001.patch, 
> HBASE-21395.branch-2.0.002.patch, HBASE-21395.branch-2.0.003.patch, 
> HBASE-21395.branch-2.0.004.patch
>
>
> In my ITBLL, I often see that if split/merge procedure and table 
> procedure(like ModifyTableProcedure) happen at the same time, and since there 
> some race conditions between these two kind of procedures,  causing some 
> serious problems. e.g. the split/merged parent is bought on line by the table 
> procedure or the split merged region making the whole table procedure 
> rollback.
> Talked with [~Apache9] offline today, this kind of problem was solved in 
> branch-2+ since There is a fence that only one RTSP can agianst a single 
> region at the same time.
> To keep out of the mess in branch-2.0 and branch-2.1, I added a simple safe 
> fence in the split/merge procedure: If there is a table procedure going on 
> against the same table, then abort the split/merge procedure. Aborting the 
> split/merge procedure at the beginning of the execution is no big deal, 
> compared with the mess it will cause...



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