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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2012/11/07 20:14:13 UTC
[jira] [Commented] (HBASE-6088) Region splitting not happened for
long time due to ZK exception while creating RS_ZK_SPLITTING node
[ https://issues.apache.org/jira/browse/HBASE-6088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492605#comment-13492605 ]
stack commented on HBASE-6088:
------------------------------
The delete of the zk node should provide the sequence id so we don't delete a znode we were not responsible for making.
This seems radical:
{code}
+ } catch (KeeperException.NoNodeException nn) {
+ if (abort) {
+ server.abort("Failed cleanup of " + hri.getRegionNameAsString(), nn);
+ }
{code}
If we don't find our splitting node we abort?
Good test.
> Region splitting not happened for long time due to ZK exception while creating RS_ZK_SPLITTING node
> ----------------------------------------------------------------------------------------------------
>
> Key: HBASE-6088
> URL: https://issues.apache.org/jira/browse/HBASE-6088
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.0
> Reporter: Gopinathan A
> Assignee: rajeshbabu
> Fix For: 0.92.2, 0.94.1, 0.96.0
>
> Attachments: addendum_6088_94.patch, HBASE-6088_92.patch, HBASE-6088_94_2.patch, HBASE-6088_94_3.patch, HBASE-6088_94.patch, HBASE-6088_trunk_2.patch, HBASE-6088_trunk_3.patch, HBASE-6088_trunk_4.patch, HBASE-6088_trunk.patch
>
>
> Region splitting not happened for long time due to ZK exception while creating RS_ZK_SPLITTING node
> {noformat}
> 2012-05-24 01:45:41,363 INFO org.apache.zookeeper.ClientCnxn: Client session timed out, have not heard from server in 26668ms for sessionid 0x1377a75f41d0012, closing socket connection and attempting reconnect
> 2012-05-24 01:45:41,464 WARN org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper exception: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/unassigned/bd1079bf948c672e493432020dc0e144
> {noformat}
> {noformat}
> 2012-05-24 01:45:43,300 DEBUG org.apache.hadoop.hbase.regionserver.wal.HLog: cleanupCurrentWriter waiting for transactions to get synced total 189377 synced till here 189365
> 2012-05-24 01:45:48,474 INFO org.apache.hadoop.hbase.regionserver.SplitRequest: Running rollback/cleanup of failed split of ufdr,011365398471659,1337823505339.bd1079bf948c672e493432020dc0e144.; Failed setting SPLITTING znode on ufdr,011365398471659,1337823505339.bd1079bf948c672e493432020dc0e144.
> java.io.IOException: Failed setting SPLITTING znode on ufdr,011365398471659,1337823505339.bd1079bf948c672e493432020dc0e144.
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.createDaughters(SplitTransaction.java:242)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.execute(SplitTransaction.java:450)
> at org.apache.hadoop.hbase.regionserver.SplitRequest.run(SplitRequest.java:67)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode = BadVersion for /hbase/unassigned/bd1079bf948c672e493432020dc0e144
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:115)
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1246)
> at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.setData(RecoverableZooKeeper.java:321)
> at org.apache.hadoop.hbase.zookeeper.ZKUtil.setData(ZKUtil.java:659)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.transitionNode(ZKAssign.java:811)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.transitionNode(ZKAssign.java:747)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.transitionNodeSplitting(SplitTransaction.java:919)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.createNodeSplitting(SplitTransaction.java:869)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.createDaughters(SplitTransaction.java:239)
> ... 5 more
> 2012-05-24 01:45:48,476 INFO org.apache.hadoop.hbase.regionserver.SplitRequest: Successful rollback of failed split of ufdr,011365398471659,1337823505339.bd1079bf948c672e493432020dc0e144.
> {noformat}
> {noformat}
> 2012-05-24 01:47:28,141 ERROR org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Node /hbase/unassigned/bd1079bf948c672e493432020dc0e144 already exists and this is not a retry
> 2012-05-24 01:47:28,142 INFO org.apache.hadoop.hbase.regionserver.SplitRequest: Running rollback/cleanup of failed split of ufdr,011365398471659,1337823505339.bd1079bf948c672e493432020dc0e144.; Failed create of ephemeral /hbase/unassigned/bd1079bf948c672e493432020dc0e144
> java.io.IOException: Failed create of ephemeral /hbase/unassigned/bd1079bf948c672e493432020dc0e144
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.createNodeSplitting(SplitTransaction.java:865)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.createDaughters(SplitTransaction.java:239)
> at org.apache.hadoop.hbase.regionserver.SplitTransaction.execute(SplitTransaction.java:450)
> at org.apache.hadoop.hbase.regionserver.SplitRequest.run(SplitRequest.java:67)
> {noformat}
> Due to the above exception, region splitting was failing contineously more than 5hrs
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