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https://issues.apache.org/jira/browse/HBASE-12791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajeshbabu Chintaguntla updated HBASE-12791:
--------------------------------------------
Attachment: HBASE-12791_v4.patch
Resubmitting the same patch to trigger HadoopQA again.
> HBase does not attempt to clean up an aborted split when the regionserver
> shutting down
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-12791
> URL: https://issues.apache.org/jira/browse/HBASE-12791
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.98.0
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Rajeshbabu Chintaguntla
> Priority: Critical
> Fix For: 2.0.0, 0.98.10, 1.0.1
>
> Attachments: HBASE-12791.patch, HBASE-12791_98.patch,
> HBASE-12791_branch1.patch, HBASE-12791_v2.patch, HBASE-12791_v3.patch,
> HBASE-12791_v4.patch, HBASE-12791_v4.patch
>
>
> HBase not cleaning the daughter region directories from HDFS if region
> server shut down after creating the daughter region directories during the
> split.
> Here the logs.
> -> RS shutdown after creating the daughter regions.
> {code}
> 2014-12-31 09:05:41,406 DEBUG [regionserver60020-splits-1419996941385]
> zookeeper.ZKAssign: regionserver:60020-0x14a9701e53100d1,
> quorum=localhost:2181, baseZNode=/hbase Transitioned node
> 80c665138d4fa32da4d792d8ed13206f from RS_ZK_REQUEST_REGION_SPLIT to
> RS_ZK_REQUEST_REGION_SPLIT
> 2014-12-31 09:05:41,514 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.HRegion: Closing
> t,,1419996880699.80c665138d4fa32da4d792d8ed13206f.: disabling compactions &
> flushes
> 2014-12-31 09:05:41,514 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.HRegion: Updates disabled for region
> t,,1419996880699.80c665138d4fa32da4d792d8ed13206f.
> 2014-12-31 09:05:41,516 INFO
> [StoreCloserThread-t,,1419996880699.80c665138d4fa32da4d792d8ed13206f.-1]
> regionserver.HStore: Closed f
> 2014-12-31 09:05:41,518 INFO [regionserver60020-splits-1419996941385]
> regionserver.HRegion: Closed
> t,,1419996880699.80c665138d4fa32da4d792d8ed13206f.
> 2014-12-31 09:05:49,922 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.MetricsRegionSourceImpl: Creating new MetricsRegionSourceImpl
> for table t dd9731ee43b104da565257ca1539aa8c
> 2014-12-31 09:05:49,922 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.HRegion: Instantiated
> t,,1419996941401.dd9731ee43b104da565257ca1539aa8c.
> 2014-12-31 09:05:49,929 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.MetricsRegionSourceImpl: Creating new MetricsRegionSourceImpl
> for table t 2e40a44511c0e187d357d651f13a1dab
> 2014-12-31 09:05:49,929 DEBUG [regionserver60020-splits-1419996941385]
> regionserver.HRegion: Instantiated
> t,row2,1419996941401.2e40a44511c0e187d357d651f13a1dab.
> Wed Dec 31 09:06:30 IST 2014 Terminating regionserver
> 2014-12-31 09:06:30,465 INFO [Thread-8] regionserver.ShutdownHook: Shutdown
> hook starting; hbase.shutdown.hook=true;
> fsShutdownHook=org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@42d2282e
> {code}
> -> Skipping rollback if RS stopped or stopping so we end up in dirty daughter
> regions in HDFS.
> {code}
> 2014-12-31 09:07:49,547 INFO [regionserver60020-splits-1419996941385]
> regionserver.SplitRequest: Skip rollback/cleanup of failed split of
> t,,1419996880699.80c665138d4fa32da4d792d8ed13206f. because server is stopped
> java.io.InterruptedIOException: Interrupted after 0 tries on 350
> at
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:156)
> {code}
> Because of this hbck always showing inconsistencies.
> {code}
> ERROR: Region { meta => null, hdfs =>
> hdfs://localhost:9000/hbase/data/default/t/2e40a44511c0e187d357d651f13a1dab,
> deployed => } on HDFS, but not listed in hbase:meta or deployed on any
> region server
> ERROR: Region { meta => null, hdfs =>
> hdfs://localhost:9000/hbase/data/default/t/dd9731ee43b104da565257ca1539aa8c,
> deployed => } on HDFS, but not listed in hbase:meta or deployed on any
> region server
> {code}
> If we try to repair then we end up in overlap regions in hbase:meta. and both
> daughter regions and parent are online.
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