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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4562) When split doing offlineParentInMeta encounters error, it'll cause data loss
Date Mon, 17 Oct 2011 05:30:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128678#comment-13128678
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Lars Hofhansl commented on HBASE-4562:
--------------------------------------

0.90 patch fails to apply. @bluedavy, could you double check all patches against the latest
of the 0.90, 0.92, trunk, respectively?

                
> When split doing offlineParentInMeta encounters error, it'll cause data loss
> ----------------------------------------------------------------------------
>
>                 Key: HBASE-4562
>                 URL: https://issues.apache.org/jira/browse/HBASE-4562
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.90.4
>            Reporter: bluedavy
>            Assignee: bluedavy
>            Priority: Blocker
>             Fix For: 0.90.5
>
>         Attachments: HBASE-4562-0.90.patch, HBASE-4562-0.92.patch, HBASE-4562-trunk.patch,
test-4562-0.90.txt, test-4562-0.92.txt, test-4562-trunk.txt
>
>
> Follow below steps to replay the problem:
> 1. change the SplitTransaction.java as below,just like mock the timeout error.
>    {code:title=SplitTransaction.java|borderStyle=solid}
>       if (!testing) {
>         MetaEditor.offlineParentInMeta(server.getCatalogTracker(),
>            this.parent.getRegionInfo(), a.getRegionInfo(), b.getRegionInfo());
>         throw new IOException("some unexpected error in split");
>       }
>    {code} 
> 2. update the regionserver code,restart;
> 3. create a table & put some data to the table;
> 4. split the table;
> 5. kill the regionserver hosted the table;
> 6. wait some time after master ServerShutdownHandler.process execute,then scan the table,u'll
find the data wrote before lost.
> We can fix the bug just use the patch.

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