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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/07/03 23:12:47 UTC
[jira] Updated: (HBASE-1573) Holes in master state change; updated
startcode and server go into .META. but catalog scanner just got old values
[ https://issues.apache.org/jira/browse/HBASE-1573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-1573:
-------------------------
Priority: Blocker (was: Major)
Fix Version/s: (was: 0.19.4)
0.20.0
Made it a blocker for 0.20.0 and for 0.19.4. Lets at least double the number of listeners for default from 10 to 20. Then, lets add to the 'Getting Started' that upping this is a good idea in loaded cluster. Putting this issue against 0.20.0 because then we won't forget it.
> Holes in master state change; updated startcode and server go into .META. but catalog scanner just got old values
> -----------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-1573
> URL: https://issues.apache.org/jira/browse/HBASE-1573
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: 1573-v2.patch, 1573-v3.patch, 1573.patch
>
>
> Here is example of a scan that takes a while because 6k regions acting on stale data resulting in double assignment of region:
> {code}
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:06,220 INFO org.apache.hadoop.hbase.master.ServerManager: Received MSG_REPORT_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748: safeMode=false from XX.XX.45.121:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:06,220 INFO org.apache.hadoop.hbase.master.RegionServerOperation: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 open on XX.XX.45.121:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:06,220 INFO org.apache.hadoop.hbase.master.RegionServerOperation: updating row enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 in region .META.,,1 with with startcode !?B and server XX.XX.45.121:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:06,397 DEBUG org.apache.hadoop.hbase.master.BaseScanner: Current assignment of enwikibase,Cwj0sehVeEbnrUDR_j0xok==,1245604540748 is not valid; Server 'XX.XX.44.95:20020' unknown.
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:06,582 INFO org.apache.hadoop.hbase.master.RegionManager: Assigning region enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 to XX.XX.45.97:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:09,587 INFO org.apache.hadoop.hbase.master.ServerManager: Received MSG_REPORT_PROCESS_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748: safeMode=false from XX.XX.45.97:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:12,614 INFO org.apache.hadoop.hbase.master.ServerManager: Received MSG_REPORT_OPEN: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748: safeMode=false from XX.XX.45.97:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:13,549 INFO org.apache.hadoop.hbase.master.RegionServerOperation: enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 open on XX.XX.45.97:20020
> hbase-Powerset-master-aa0-000-8.u.powerset.com.log.2009-06-22:2009-06-22 10:56:13,549 INFO org.apache.hadoop.hbase.master.RegionServerOperation: updating row enwikibase,Cwj1sehVeEbnrUDR_j0xok==,1245604540748 in region .META.,,1 with with startcode !?? and server XX.XX.45.97:20020
> {code}
> We've just updated the server info in the master because of the region open message but the scan sees old info in the .META. table though .META. was just updated.
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