It would be nice to have a patch for 0.90.4 also.
Thanks, -Jack On Mon, Oct 31, 2011 at 9:49 AM, stack (Updated) (JIRA) <[email protected]> wrote: > > [ > https://issues.apache.org/jira/browse/HBASE-4695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel > ] > > stack updated HBASE-4695: > ------------------------- > > Fix Version/s: 0.92.0 > >> WAL logs get deleted before region server can fully flush >> --------------------------------------------------------- >> >> Key: HBASE-4695 >> URL: https://issues.apache.org/jira/browse/HBASE-4695 >> Project: HBase >> Issue Type: Bug >> Components: wal >> Affects Versions: 0.90.4 >> Reporter: jack levin >> Assignee: gaojinchao >> Priority: Blocker >> Fix For: 0.92.0, 0.90.5 >> >> Attachments: HBASE-4695_Trunk_V2.patch, >> HBASE-4695_branch90_trial.patch, hbase-4695-0.92.txt >> >> >> To replicate the problem do the following: >> 1. check /hbase/.logs/XXXX directory to see if you have WAL logs for the >> region server you are shutting down. >> 2. executing kill <pid> (where pid is a regionserver pid) >> 3. Watch the regionserver log to start flushing, you will see how many >> regions are left to flush: >> 09:36:54,665 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: >> Waiting on 489 regions to close >> 09:56:35,779 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: >> Waiting on 116 regions to close >> 4. Check /hbase/.logs/XXXX -- you will notice that it has dissapeared. >> 5. Check namenode logs: >> 09:26:41,607 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit: >> ugi=root ip=/10.101.1.5 cmd=delete >> src=/hbase/.logs/rdaa5.prod.imageshack.com,60020,1319749 >> Note that, if you kill -9 the RS now, and it crashes on flush, you won't >> have any WAL logs to replay. We need to make sure that logs are deleted or >> moved out only when RS has fully flushed. Otherwise its possible to lose >> data. > > -- > This message is automatically generated by JIRA. > If you think it was sent incorrectly, please contact your JIRA > administrators: > https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa > For more information on JIRA, see: http://www.atlassian.com/software/jira > > >
