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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17460) enable_table_replication can not perform cyclic replication of a table
Date Thu, 09 Feb 2017 23:40:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860405#comment-15860405
] 

Hadoop QA commented on HBASE-17460:
-----------------------------------

| (x) *{color:red}-1 overall{color}* |
\\
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s {color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 7s {color} | {color:red}
HBASE-17460 does not apply to master. Rebase required? Wrong Branch? See https://yetus.apache.org/documentation/0.3.0/precommit-patchnames
for help. {color} |
\\
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12851958/HBASE-17460_v3.patch
|
| JIRA Issue | HBASE-17460 |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/5656/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> enable_table_replication can not perform cyclic replication of a table
> ----------------------------------------------------------------------
>
>                 Key: HBASE-17460
>                 URL: https://issues.apache.org/jira/browse/HBASE-17460
>             Project: HBase
>          Issue Type: Bug
>          Components: Replication
>            Reporter: NITIN VERMA
>            Assignee: NITIN VERMA
>              Labels: replication
>         Attachments: HBASE-17460.patch, HBASE-17460_v2.patch, HBASE-17460_v3.patch
>
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> The enable_table_replication operation is broken for cyclic replication of HBase table
as we compare all the properties of column families (including REPLICATION_SCOPE). 
> Below is exactly what happens:
> 1.  Running "enable_table_replication 'table1'  " opeartion on first cluster will set
the REPLICATION_SCOPE of all column families to peer id '1'. This will also create a table
on second cluster where REPLICATION_SCOPE is still set to peer id '0'.
> 2. Now when we run "enable_table_replication 'table1'" on second cluster, we compare
all the properties of table (including REPLICATION_SCOPE_, which obviously is different now.

> I am proposing a fix for this issue where we should avoid comparing REPLICATION_SCOPE
inside HColumnDescriotor::compareTo() method, especially when replication is not already enabled
on the desired table.
> I have made that change and it is working. I will submit the patch soon.



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