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From "ramkrishna.s.vasudevan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4580) Create some invalid zk nodes when a clean cluster start.
Date Wed, 12 Oct 2011 16:49:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125966#comment-13125966
] 

ramkrishna.s.vasudevan commented on HBASE-4580:
-----------------------------------------------

@Gao
{code}
List<String> nodes = ZKUtil.listChildrenAndWatchForNewChildren(watcher,
+        watcher.assignmentZNode);
{code}
This call is made twice.  May be we can avoid by passing the list of nodes to recoverlostregion
and add it with the list of nodes that we create by forcing offline.
I feel this may reduce one call to zk.
What do you feel Gao? Correct me if am wrong.
                
> Create some invalid zk nodes when a clean cluster start.
> --------------------------------------------------------
>
>                 Key: HBASE-4580
>                 URL: https://issues.apache.org/jira/browse/HBASE-4580
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.92.0
>            Reporter: gaojinchao
>            Assignee: gaojinchao
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4580_TrunkV1.patch
>
>
> The below logs said that we created a invalid zk node when restarted a cluster.
> it mistakenly believed that the regions belong to a dead server.
> 2011-10-11 05:05:29,127 INFO org.apache.hadoop.hbase.master.HMaster: Meta updated status
= true
> 2011-10-11 05:05:29,127 INFO org.apache.hadoop.hbase.master.HMaster: ROOT/Meta already
up-to date with new HRI.
> 2011-10-11 05:05:29,151 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for 771d63e9327383159553619a4f2dc74f with OFFLINE state
> 2011-10-11 05:05:29,161 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for 3cf860dd323fe6360f571aeafc129f95 with OFFLINE state
> 2011-10-11 05:05:29,170 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for 4065350214452a9d5c55243c734bef08 with OFFLINE state
> 2011-10-11 05:05:29,178 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for 4e81613f82a39fc6e5e89f96e7b3ccc4 with OFFLINE state
> 2011-10-11 05:05:29,187 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for e21b9e1545a28953aba0098fda5c9cd9 with OFFLINE state
> 2011-10-11 05:05:29,195 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for 5cd9f55eecd43d088bbd505f6795131f with OFFLINE state
> 2011-10-11 05:05:29,229 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for db5f641452a70b09b85a92970e4198c7 with OFFLINE state
> 2011-10-11 05:05:29,237 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for a7b20a653919e7f41bfb2ed349af7d21 with OFFLINE state
> 2011-10-11 05:05:29,253 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Creating (or updating) unassigned node for c9385619425f737eab1a6624d2e097a8 with OFFLINE state
> // we cleaned all zk nodes.
> 2011-10-11 05:05:29,262 INFO org.apache.hadoop.hbase.master.AssignmentManager: Clean
cluster startup. Assigning userregions
> 2011-10-11 05:05:29,262 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Deleting any existing unassigned nodes
> 2011-10-11 05:05:29,367 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning
9 region(s) across 1 server(s), retainAssignment=true
> 2011-10-11 05:05:29,369 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Timeout-on-RIT=9000
> 2011-10-11 05:05:29,369 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Bulk
assigning 9 region(s) to C3S3,54366,1318323920153
> 2011-10-11 05:05:29,369 INFO org.apache.hadoop.hbase.master.AssignmentManager: Bulk assigning
done
> 2011-10-11 05:05:29,371 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for 771d63e9327383159553619a4f2dc74f with OFFLINE state
> 2011-10-11 05:05:29,371 INFO org.apache.hadoop.hbase.master.HMaster: Master has completed
initialization
> 2011-10-11 05:05:29,371 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for 3cf860dd323fe6360f571aeafc129f95 with OFFLINE state
> 2011-10-11 05:05:29,371 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for 4065350214452a9d5c55243c734bef08 with OFFLINE state
> 2011-10-11 05:05:29,371 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for 4e81613f82a39fc6e5e89f96e7b3ccc4 with OFFLINE state
> 2011-10-11 05:05:29,371 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for e21b9e1545a28953aba0098fda5c9cd9 with OFFLINE state
> 2011-10-11 05:05:29,372 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for 5cd9f55eecd43d088bbd505f6795131f with OFFLINE state
> 2011-10-11 05:05:29,372 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for db5f641452a70b09b85a92970e4198c7 with OFFLINE state
> 2011-10-11 05:05:29,372 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for a7b20a653919e7f41bfb2ed349af7d21 with OFFLINE state
> 2011-10-11 05:05:29,372 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: master:58198-0x132f23a9a380000
Async create of unassigned node for c9385619425f737eab1a6624d2e097a8 with OFFLINE state

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