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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3403) Region orphaned after failure during split
Date Wed, 05 Jan 2011 21:58:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12977989#action_12977989

Todd Lipcon commented on HBASE-3403:

+    // Turn off the meta scanner so it don't remove parent on us.
+    cluster.getMaster().catalogJanitorSwitch(false);

Is this a potential issue? ie the catalog janitor shouldn't remove the parent if the daughters
aren't ready yet, should it? Or is this just for the simulation done in the test?

- naming-wise, can we use "setCatalogJanitorEnabled(false)" just like our other accessors?
Also .onOff() -> setEnabled()?

- Does this change introduce a new bug? Consider the following scenario:
1. Region A exists
2. Region A splits to B and C, A is marked offline
3. B and C both open just fine
4. B splits to E and F, successfully
5. server crashes

When we process the server shutdown, we end up re-creating B.

> Region orphaned after failure during split
> ------------------------------------------
>                 Key: HBASE-3403
>                 URL: https://issues.apache.org/jira/browse/HBASE-3403
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.0
>            Reporter: Todd Lipcon
>            Priority: Blocker
>             Fix For: 0.90.0
>         Attachments: 3403.txt, broken-split.txt, hbck-fix-missing-in-meta.txt, master-logs.txt.gz
> ERROR: Region hdfs://haus01.sf.cloudera.com:11020/hbase-normal/usertable/2ad8df700eea55f70e02ea89178a65a2
on HDFS, but not listed in META or deployed on any region server.
> ERROR: Found inconsistency in table usertable
> Not sure how I got into this state, will look through logs.

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