[
https://issues.apache.org/jira/browse/HBASE-549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585865#action_12585865
]
Jim Kellerman commented on HBASE-549:
-------------------------------------
Is this still an issue since HBASE-505 was committed?
> Don't CLOSE region if message is not from server that opened it or is opening
> it
> --------------------------------------------------------------------------------
>
> Key: HBASE-549
> URL: https://issues.apache.org/jira/browse/HBASE-549
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.16.0, 0.2.0, 0.1.1, 0.1.0
> Reporter: stack
> Fix For: 0.2.0
>
>
> We assign a region to a server. It takes too long to open (HBASE-505).
> Region gets assigned to another server. Meantime original host returns a
> MSG_REPORT_CLOSE (because other regions opening messes it up moving files on
> disk out from under it). We queue a shutdown which marks the region as
> needing reassignment. Second server reports in that it successfully opened
> the region. Master tells it it should not have opened it. Churn ensues.
> Fix is to ignore the CLOSE if its reported server/startcode does not match
> that of the server currently trying to open region. Fix is not easy because
> currently we don't keep list of server info in unassigned regions.
> Here's master log snippet showing problem:
> {code}
> ...
> 2008-03-25 19:16:43,711 INFO org.apache.hadoop.hbase.HMaster: assigning
> region enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 to server
> XX.XX.XX.220:60020
> 2008-03-25 19:16:46,725 DEBUG org.apache.hadoop.hbase.HMaster: Received
> MSG_REPORT_PROCESS_OPEN :
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 from XX.XX.XX.220:60020
> 2008-03-25 19:18:06,411 DEBUG org.apache.hadoop.hbase.HMaster: shutdown
> scanner looking at enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:18:06,811 DEBUG org.apache.hadoop.hbase.HMaster: shutdown
> scanner looking at enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:19:46,841 INFO org.apache.hadoop.hbase.HMaster: assigning
> region enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 to server
> XX.XX.XX.221:60020
> 2008-03-25 19:19:49,849 DEBUG org.apache.hadoop.hbase.HMaster: Received
> MSG_REPORT_PROCESS_OPEN :
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 from XX.XX.XX.221:60020
> 2008-03-25 19:19:56,883 DEBUG org.apache.hadoop.hbase.HMaster: Received
> MSG_REPORT_CLOSE : enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 from
> XX.XX.XX.220:60020
> 2008-03-25 19:19:56,883 INFO org.apache.hadoop.hbase.HMaster:
> XX.XX.XX.220:60020 no longer serving regionname:
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482, startKey:
> <iLStZ0yTnfVUziYcNVVxWV==>, endKey: <jLB27Q4hKls4tSvp64rJfF==
> >, encodedName: 1857033608, tableDesc: {name: enwiki_080103, families:
> >{alternate_title:={name: alternate_title, max versions: 3, compression:
> >NONE, in memory: false, max length: 2147483647, bloom filter: none},
> >alternate_url:={name: al
> ternate_url, max versions: 3, compression: NONE, in memory: false, max
> length: 2147483647, bloom filter: none}, anchor:={name: anchor, max versions:
> 3, compression: NONE, in memory: false, max length: 2147483647, bloom filter:
> none}, mi
> sc:={name: misc, max versions: 3, compression: NONE, in memory: false, max
> length: 2147483647, bloom filter: none}, page:={name: page, max versions: 3,
> compression: NONE, in memory: false, max length: 2147483647, bloom filter:
> none}, re
> direct:={name: redirect, max versions: 3, compression: NONE, in memory:
> false, max length: 2147483647, bloom filter: none}}}
> 2008-03-25 19:19:56,885 DEBUG org.apache.hadoop.hbase.HMaster: Main
> processing loop: ProcessRegionClose of
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482, true, false
> 2008-03-25 19:19:56,885 INFO org.apache.hadoop.hbase.HMaster: region closed:
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:19:56,887 INFO org.apache.hadoop.hbase.HMaster: reassign
> region: enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:19:57,288 INFO org.apache.hadoop.hbase.HMaster: assigning
> region enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 to server
> XX.XX.XX.189:60020
> 2008-03-25 19:20:00,296 DEBUG org.apache.hadoop.hbase.HMaster: Received
> MSG_REPORT_PROCESS_OPEN :
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 from XX.XX.XX.189:60020
> 2008-03-25 19:20:16,885 DEBUG org.apache.hadoop.hbase.HMaster: Received
> MSG_REPORT_OPEN : enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 from
> XX.XX.XX.221:60020
> 2008-03-25 19:20:16,885 DEBUG org.apache.hadoop.hbase.HMaster: region server
> XX.XX.XX.221:60020 should not have opened region
> enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:23:51,707 DEBUG org.apache.hadoop.hbase.HMaster: shutdown
> scanner looking at enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:23:51,834 DEBUG org.apache.hadoop.hbase.HMaster: shutdown
> scanner looking at enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482
> 2008-03-25 19:23:53,947 INFO org.apache.hadoop.hbase.HMaster: assigning
> region enwiki_080103,iLStZ0yTnfVUziYcNVVxWV==,1205393076482 to server
> XX.XX.XX.97:60020
> ...
> {code}
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
