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https://issues.apache.org/jira/browse/HBASE-20001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16374928#comment-16374928
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Thiruvel Thirumoolan commented on HBASE-20001:
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[~yuzhih...@gmail.com], sure, will wait for any other feedback and address
them. I will change the method to cleanFailedSplitMergeRegions() if thats ok.
[~chia7712],
{quote}Is there a chance that null server is passed to RegionStates?
{quote}
I remember a failure without the check, lemme run tests locally and check.
{quote}Why we always remove the daughter region directories when using the
ZooKeeper based region assignments? It seems to me that it is another kind of
data lose?
{quote}
We rollback during split and merge failures in zk assignment. So, we online the
parents and cleanup the failed splits/merges. This is demonstrated by the unit
tests - testMergeIsRolledBackOnMERGEFailure and
testSplitIsRolledBackOnSPLITFailure. I also explained this in one of the
comments above, lemme know what you think.
Thanks!
> cleanIfNoMetaEntry() uses encoded instead of region name to lookup region
> -------------------------------------------------------------------------
>
> Key: HBASE-20001
> URL: https://issues.apache.org/jira/browse/HBASE-20001
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.2.0, 1.3.0, 1.4.0, 1.1.7
> Reporter: Francis Liu
> Assignee: Thiruvel Thirumoolan
> Priority: Major
> Fix For: 1.3.2, 1.5.0, 1.2.7, 1.4.3
>
> Attachments: HBASE-20001.branch-1.4.001.patch,
> HBASE-20001.branch-1.4.002.patch, HBASE-20001.branch-1.4.003.patch,
> HBASE-20001.branch-1.4.004.patch, HBASE-20001.branch-1.4.005.patch
>
>
> In RegionStates.cleanIfNoMetaEntry()
> {{if (MetaTableAccessor.getRegion(server.getConnection(),
> hri.getEncodedNameAsBytes()) == null) {}}
> {{regionOffline(hri);}}
> {{FSUtils.deleteRegionDir(server.getConfiguration(), hri);}}
> }
> But api expects regionname
> {{public static Pair<HRegionInfo, ServerName> getRegion(Connection
> connection, byte [] regionName)}}
> So we might end up cleaning good regions.
>
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