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https://issues.apache.org/jira/browse/HBASE-9813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jimmy Xiang updated HBASE-9813:
-------------------------------
Attachment: trunk-9813_v2.patch
Attached patch v2, reenable file overwrite. The util is used by log split as
well to create recovered edits, which may need to overwrite sometimes. I was
wondering overwriting a WAL (not recovered edits) is a good idea.
> Log splitting doesn't prevent RS creating new hlog file
> -------------------------------------------------------
>
> Key: HBASE-9813
> URL: https://issues.apache.org/jira/browse/HBASE-9813
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: nn.log, trunk-9813.patch, trunk-9813.patch,
> trunk-9813_v2.patch
>
>
> Here is something weird happened to my cluster. When the master recovered,
> it thought RS was dead by mistake and SSH processed it. Four hlog files were
> split and 4 regions were reassigned.
> Later on when the RS tried to report status, it got YouAreDeadException from
> master. Master tried to recover it again. Now SSH split one more hlog file,
> assigned 0 more extra region.
> Now the question is how come is the extra log file? I think it caused a data
> loss (one row) in my case. How can we prevent it? I can add a checking in
> the master to make sure a RS is really dead before marking it dead during
> recovery since it may be slow in reporting to the new master. But this is not
> a proper fix. A proper fix should be in the RS side, not creating the extra
> hlog file. Is this doable?
> Here is the related master log. The RS log does not have much thing
> interested.
> {noformat}
> 2013-10-20 17:40:33,025 INFO [master:e1119:36000] master.MasterFileSystem:
> Log folder
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312
> doesn't belong to a known region server, splitting
> 2013-10-20 17:40:33,432 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> handler.ServerShutdownHandler: Splitting logs for
> e1521.halxg.cloudera.com,36020,1382314725312 before assignment.
> 2013-10-20 17:40:33,461 DEBUG [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.MasterFileSystem: Renamed region directory:
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting
> 2013-10-20 17:40:33,462 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: dead splitlog workers
> [e1521.halxg.cloudera.com,36020,1382314725312]
> 2013-10-20 17:40:33,467 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: started splitting 3 logs in
> [hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting]
> 2013-10-20 17:40:36,157 DEBUG [main-EventThread] wal.HLogSplitter: Archived
> processed log
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315954499
> to
> hdfs://e1119.halxg.cloudera.com:35802/hbase/oldWALs/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315954499
> 2013-10-20 17:40:37,357 DEBUG [main-EventThread] wal.HLogSplitter: Archived
> processed log
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315934942
> to
> hdfs://e1119.halxg.cloudera.com:35802/hbase/oldWALs/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315934942
> 2013-10-20 17:40:38,889 DEBUG [main-EventThread] wal.HLogSplitter: Archived
> processed log
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315971393
> to
> hdfs://e1119.halxg.cloudera.com:35802/hbase/oldWALs/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315971393
> 2013-10-20 17:40:38,906 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: finished splitting (more than or equal to) 255322969
> bytes in 3 log files in
> [hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting]
> in 5439ms
> 2013-10-20 17:40:38,907 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> handler.ServerShutdownHandler: Reassigning 4 region(s) that
> e1521.halxg.cloudera.com,36020,1382314725312 was carrying (and 0 regions(s)
> that were opening on this server)
> 2013-10-20 17:40:39,269 DEBUG [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.DeadServer: Finished processing
> e1521.halxg.cloudera.com,36020,1382314725312
> 2013-10-20 17:40:39,269 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> handler.ServerShutdownHandler: Finished processing of shutdown of
> e1521.halxg.cloudera.com,36020,1382314725312
> 2013-10-20 17:40:46,764 DEBUG [FifoRpcScheduler.handler1-thread-11]
> master.ServerManager: Server REPORT rejected; currently processing
> e1521.halxg.cloudera.com,36020,1382314725312 as dead server
> 2013-10-20 17:40:46,871 ERROR [FifoRpcScheduler.handler1-thread-13]
> master.HMaster: Region server e1521.halxg.cloudera.com,36020,1382314725312
> reported a fatal error:
> ABORTING region server e1521.halxg.cloudera.com,36020,1382314725312:
> org.apache.hadoop.hbase.YouAreDeadException: Server REPORT rejected;
> currently processing e1521.halxg.cloudera.com,36020,1382314725312 as dead
> server
> org.apache.hadoop.hbase.YouAreDeadException:
> org.apache.hadoop.hbase.YouAreDeadException: Server REPORT rejected;
> currently processing e1521.halxg.cloudera.com,36020,1382314725312 as dead
> server
> Caused by:
> org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.YouAreDeadException):
> org.apache.hadoop.hbase.YouAreDeadException: Server REPORT rejected;
> currently processing e1521.halxg.cloudera.com,36020,1382314725312 as dead
> server
> 2013-10-20 17:40:46,872 ERROR [FifoRpcScheduler.handler1-thread-14]
> master.HMaster: Region server e1521.halxg.cloudera.com,36020,1382314725312
> reported a fatal error:
> ABORTING region server e1521.halxg.cloudera.com,36020,1382314725312: IOE in
> log roller
> java.io.FileNotFoundException: File does not exist:
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382315971393
> 2013-10-20 17:40:48,075 ERROR [FifoRpcScheduler.handler1-thread-15]
> master.HMaster: Region server e1521.halxg.cloudera.com,36020,1382314725312
> reported a fatal error:
> ABORTING region server e1521.halxg.cloudera.com,36020,1382314725312:
> regionserver:36020-0x1419fea35edda89 regionserver:36020-0x1419fea35edda89
> received expired from ZooKeeper, aborting
> 2013-10-20 17:53:15,272 INFO [master:e1119:36000] master.MasterFileSystem:
> Log folder
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312
> doesn't belong to a known region server, splitting
> 2013-10-20 17:53:15,806 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> handler.ServerShutdownHandler: Splitting logs for
> e1521.halxg.cloudera.com,36020,1382314725312 before assignment.
> 2013-10-20 17:53:15,825 DEBUG [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.MasterFileSystem: Renamed region directory:
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting
> 2013-10-20 17:53:15,825 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: dead splitlog workers
> [e1521.halxg.cloudera.com,36020,1382314725312]
> 2013-10-20 17:53:15,831 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: started splitting 1 logs in
> [hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting]
> 2013-10-20 17:53:15,998 DEBUG [main-EventThread] wal.HLogSplitter: Archived
> processed log
> hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382316046805
> to
> hdfs://e1119.halxg.cloudera.com:35802/hbase/oldWALs/e1521.halxg.cloudera.com%2C36020%2C1382314725312.1382316046805
> 2013-10-20 17:53:16,014 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> master.SplitLogManager: finished splitting (more than or equal to) 15 bytes
> in 1 log files in
> [hdfs://e1119.halxg.cloudera.com:35802/hbase/WALs/e1521.halxg.cloudera.com,36020,1382314725312-splitting]
> in 183ms
> 2013-10-20 17:53:16,015 INFO [MASTER_SERVER_OPERATIONS-e1119:36000-0]
> handler.ServerShutdownHandler: Reassigning 0 region(s) that
> e1521.halxg.cloudera.com,36020,1382314725312 was carrying (and 0 regions(s)
> that were opening on this server)
> {noformat}
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