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Posted to dev@hbase.apache.org by "Jean-Daniel Cryans (JIRA)" <ji...@apache.org> on 2013/01/11 01:56:13 UTC
[jira] [Resolved] (HBASE-7534) [replication]
TestReplication.queueFailover can fail because
HBaseTestingUtility.createMultiRegions is dangerous
[ https://issues.apache.org/jira/browse/HBASE-7534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Daniel Cryans resolved HBASE-7534.
---------------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Committed to trunk and 0.94
> [replication] TestReplication.queueFailover can fail because HBaseTestingUtility.createMultiRegions is dangerous
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-7534
> URL: https://issues.apache.org/jira/browse/HBASE-7534
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.3
> Reporter: Jean-Daniel Cryans
> Assignee: Jean-Daniel Cryans
> Fix For: 0.96.0, 0.94.5
>
> Attachments: HBASE-7534.patch
>
>
> {{HBaseTestingUtility.createMultiRegions}} is an abomination, it uses an already existing table and hot replaces the regions in it. I've seen TestReplication failing a few times because the "old" first region is still assigned and tried to flush but crashed due to the fact that the region's folder is missing in HDFS:
> {noformat}
> 2013-01-04 10:04:45,500 DEBUG [RegionServer:1;172.21.3.117,57114,1357322589018.cacheFlusher] regionserver.Store(844): Renaming flushed file at hdfs://localhost:57099/user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/.tmp/b938b33268064312abfc250d2eeca61d to hdfs://localhost:57099/user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/f/b938b33268064312abfc250d2eeca61d
> 2013-01-04 10:04:45,500 WARN [IPC Server handler 8 on 57099] namenode.FSDirectory(422): DIR* FSDirectory.unprotectedRenameTo: failed to rename /user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/.tmp/b938b33268064312abfc250d2eeca61d to /user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/f/b938b33268064312abfc250d2eeca61d because destination's parent does not exist
> 2013-01-04 10:04:45,503 WARN [RegionServer:1;172.21.3.117,57114,1357322589018.cacheFlusher] regionserver.Store(847): Unable to rename hdfs://localhost:57099/user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/.tmp/b938b33268064312abfc250d2eeca61d to hdfs://localhost:57099/user/jdcryans/hbase/test/62c85f8a6e3d0e32b2fb21326537f5a6/f/b938b33268064312abfc250d2eeca61d
> 2013-01-04 10:04:45,504 WARN [DataStreamer for file /user/jdcryans/hbase/.logs/172.21.3.117,57113,1357322588994/172.21.3.117%2C57113%2C1357322588994.1357322683769] hdfs.DFSClient$DFSOutputStream$DataStreamer(2873): DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /user/jdcryans/hbase/.logs/172.21.3.117,57113,1357322588994/172.21.3.117%2C57113%2C1357322588994.1357322683769 File does not exist. [Lease. Holder: DFSClient_hb_rs_172.21.3.117,57113,1357322588994, pendingcreates: 1]
> {noformat}
> Eventually the test times out because both region servers on the master cluster are dead.
> It can be easily fixed by pre-creating the table with enough regions.
> FWIW a bunch of other tests are using this facility, my IDE tells me that the 3 methods are called 25 times outside of {{HBaseTestingUtility}}.
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