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From "Liu Shaohui (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7258) Hbase needs to create baseZNode recursivly
Date Tue, 04 Dec 2012 11:24:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509673#comment-13509673
] 

Liu Shaohui commented on HBASE-7258:
------------------------------------

After a look at the code of failed tests, I think there is no relationship between the patch
and failed tests.
                
> Hbase needs to create baseZNode recursivly
> ------------------------------------------
>
>                 Key: HBASE-7258
>                 URL: https://issues.apache.org/jira/browse/HBASE-7258
>             Project: HBase
>          Issue Type: Bug
>          Components: Zookeeper
>    Affects Versions: 0.94.2
>            Reporter: Liu Shaohui
>            Priority: Minor
>              Labels: zookeeper, zookeeper.znode.parent
>         Attachments: HBASE-7258.diff, HBASE-7258.patch
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> In deploy env, multi small hbase clusters may share a same zk cluster. So, for hbase
cluster1, its parent znode is /hbase/cluster1. But in hbase version 0.94.1, hbase use ZKUtil.createAndFailSilent(this,
baseZNode) to create parent path and it will throw a NoNode exception if znode /hbase donot
exist.
> We want to change it to ZKUtil.createWithParents(this, baseZNode); to suport create baseZNode
recursivly. 
> The NoNode exception is:
> java.lang.RuntimeException: Failed construction of Master: class org.apache.hadoop.hbase.master.HMaster
>         at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:1792)
>         at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:146)
>         at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:103)
>         at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>         at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:77)
>         at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1806)
> Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /hbase/cluster1
>         at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
>         at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
>         at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:778)
>         at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.createNonSequential(RecoverableZooKeeper.java:420)
>         at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.create(RecoverableZooKeeper.java:402)
>         at org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:905)
>         at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.createBaseZNodes(ZooKeeperWatcher.java:166)
>         at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:159)
>         at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:282)
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>         at org.apache.hadoop.hbase.master.H

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