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Posted to issues@hbase.apache.org by "Madhuwanti Vaidya (Created) (JIRA)" <ji...@apache.org> on 2011/11/02 17:59:34 UTC
[jira] [Created] (HBASE-4726) RS should close region if it fails to
mark it as 'OPENED'.
RS should close region if it fails to mark it as 'OPENED'.
----------------------------------------------------------
Key: HBASE-4726
URL: https://issues.apache.org/jira/browse/HBASE-4726
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.89.20100924
Reporter: Madhuwanti Vaidya
Assignee: Madhuwanti Vaidya
Priority: Minor
Currently if a RS fails to mark a region as 'OPENED' it only logs an error. It will leave the region open - this has caused duplicate region assignments in one of our production clusters.
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[jira] [Commented] (HBASE-4726) RS should close region if it fails
to mark it as 'OPENED'.
Posted by "ramkrishna.s.vasudevan (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143831#comment-13143831 ]
ramkrishna.s.vasudevan commented on HBASE-4726:
-----------------------------------------------
This may also be fixed by HBASE-4540.
> RS should close region if it fails to mark it as 'OPENED'.
> ----------------------------------------------------------
>
> Key: HBASE-4726
> URL: https://issues.apache.org/jira/browse/HBASE-4726
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.89.20100924
> Reporter: Madhuwanti Vaidya
> Assignee: Madhuwanti Vaidya
> Priority: Minor
>
> Currently if a RS fails to mark a region as 'OPENED' it only logs an error. It will leave the region open - this has caused duplicate region assignments in one of our production clusters.
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[jira] [Resolved] (HBASE-4726) RS should close region if it fails
to mark it as 'OPENED'.
Posted by "Jesse Yates (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jesse Yates resolved HBASE-4726.
--------------------------------
Resolution: Duplicate
Marking as duplicate and closing, unless there is an objection.
> RS should close region if it fails to mark it as 'OPENED'.
> ----------------------------------------------------------
>
> Key: HBASE-4726
> URL: https://issues.apache.org/jira/browse/HBASE-4726
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.89.20100924
> Reporter: Madhuwanti Vaidya
> Assignee: Madhuwanti Vaidya
> Priority: Minor
>
> Currently if a RS fails to mark a region as 'OPENED' it only logs an error. It will leave the region open - this has caused duplicate region assignments in one of our production clusters.
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[jira] [Commented] (HBASE-4726) RS should close region if it fails
to mark it as 'OPENED'.
Posted by "Madhuwanti Vaidya (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143492#comment-13143492 ]
Madhuwanti Vaidya commented on HBASE-4726:
------------------------------------------
This is the scenario we saw:
1. Region r is opened on RS1 and ZNode is updated with RS2ZK_REGION_OPENED.
2. But for some reason update to META takes a long time. (Not sure why yet)
3. hbck reports r is still unassigned - since update to META has not happened yet.
4. hbck -fix is run.
5. Now master tries to assign r to RS2.
The following two happen simultaneously:
6a. Master now processes the old RS2ZK_REGION_OPENED update from RS1. This updates META and clears ZK.
6a. RS2 onlines the r - but when it tries to set state to RS2ZK_REGION_OPENED, it gets a ZK NoNodeException error.
> RS should close region if it fails to mark it as 'OPENED'.
> ----------------------------------------------------------
>
> Key: HBASE-4726
> URL: https://issues.apache.org/jira/browse/HBASE-4726
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.89.20100924
> Reporter: Madhuwanti Vaidya
> Assignee: Madhuwanti Vaidya
> Priority: Minor
>
> Currently if a RS fails to mark a region as 'OPENED' it only logs an error. It will leave the region open - this has caused duplicate region assignments in one of our production clusters.
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