hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "chunhui shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6329) Stop META regionserver when splitting region could cause daughter region assign twice
Date Fri, 06 Jul 2012 03:17:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13407672#comment-13407672
] 

chunhui shen commented on HBASE-6329:
-------------------------------------

@ted
{code}-      // add 2nd daughter first (see HBASE-4335)
-      MetaEditor.addDaughter(server.getCatalogTracker(),
-          b.getRegionInfo(), services.getServerName());
-      MetaEditor.addDaughter(server.getCatalogTracker(),
-          a.getRegionInfo(), services.getServerName());
{code}

Master will fixup daughters, so we don't need addDaughter since rs is stopped, 
Or else master maybe already assigned the daughter and opened otherwhere, this operation would
cause daughters' META data error
                
> Stop META regionserver when splitting region could cause daughter region assign twice
> -------------------------------------------------------------------------------------
>
>                 Key: HBASE-6329
>                 URL: https://issues.apache.org/jira/browse/HBASE-6329
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.94.0
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>         Attachments: HBASE-6329v1.patch, HBASE-6329v2.patch
>
>
> We found this issue in 0.94, first let me describe the caseļ¼š
> Stop META rs when split is in progress
> 1.Stopping META rs(Server A).
> 2.The main thread of rs close ZK and delete ephemeral node of the rs.
> 3.SplitTransaction is retring MetaEditor.addDaughter
> 4.Master's ServerShutdownHandler process the above dead META server
> 5.Master fixup daughter and assign the daughter
> 6.The daughter is opened on another server(Server B)
> 7.Server A's splitTransaction successfully add the daughter to .META. with serverName=Server
A
> 8.Now, in the .META., daughter's region location is Server A but it is onlined on Server
B
> 9.Restart Master, and master will assign the daughter again.
> Attaching the logs, daughter region 80f999ea84cb259e20e9a228546f6c8a
> Master log:
> 2012-07-04 13:45:56,493 INFO org.apache.hadoop.hbase.master.handler.ServerShutdownHandler:
Splitting logs for dw93.kgb.sqa.cm4,60020,1341378224464
> 2012-07-04 13:45:58,983 INFO org.apache.hadoop.hbase.master.handler.ServerShutdownHandler:
Fixup; missing daughter writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.

> 2012-07-04 13:45:58,985 INFO org.apache.hadoop.hbase.catalog.MetaEditor: Added daughter
writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.,
serverName=null 
> 2012-07-04 13:45:58,988 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning
region writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.
to dw88.kgb.sqa.cm4,60020,1341379188777 
> 2012-07-04 13:46:00,201 INFO org.apache.hadoop.hbase.master.AssignmentManager: The master
has opened the region writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.
that was online on dw88.kgb.sqa.cm4,60020,1341379188777 
> Master log after restart:
> 2012-07-04 14:27:05,824 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:60000-0x136187d60e34644
Creating (or updating) unassigned node for 80f999ea84cb259e20e9a228546f6c8a with OFFLINE state

> 2012-07-04 14:27:05,851 INFO org.apache.hadoop.hbase.master.AssignmentManager: Processing
region writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.
in state M_ZK_REGION_OFFLINE 
> 2012-07-04 14:27:05,854 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning
region writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.
to dw93.kgb.sqa.cm4,60020,1341380812020 
> 2012-07-04 14:27:06,051 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Handling
transition=RS_ZK_REGION_OPENED, server=dw93.kgb.sqa.cm4,60020,1341380812020, region=80f999ea84cb259e20e9a228546f6c8a

> Regionserver(META rs) log:
> 2012-07-04 13:45:56,491 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: stopping
server dw93.kgb.sqa.cm4,60020,1341378224464; zookeeper connection c
> losed.
> 2012-07-04 13:46:11,951 INFO org.apache.hadoop.hbase.catalog.MetaEditor: Added daughter
writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.,
serverName=dw93.kgb.sqa.cm4,60020,1341378224464 
> 2012-07-04 13:46:11,952 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: Done
with post open deploy task for region=writetest,JC\xCA\xC8\xCF<Q\xC49>OH\xCEV\xCC\xC2\xB5\xC2@\xD4,1341380730558.80f999ea84cb259e20e9a228546f6c8a.,
daughter=true 

--
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

       

Mime
View raw message