[HBASE-7258] Hbase needs to create baseZNode recursively

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.94.2
• Fix Version/s: 0.95.0
• Component/s: Zookeeper
• Labels: zookeeper zookeeper.znode.parent
• Hadoop Flags: Reviewed
• Assignee: Shaohui Liu
• Reporter: Shaohui Liu
• Created: 03/Dec/12 03:28
• Updated: 23/Sep/13 18:30
• Resolved: 11/Jan/13 07:07

Description

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