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HBase, mail # user - ClusterId read in ZooKeeper is null


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Brian Jeltema 2013-07-09, 17:05
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Re: ClusterId read in ZooKeeper is null
Gary Helmling 2013-07-09, 17:28
Is the HMaster process running correctly on the cluster?  Between the
missing cluster ID and meta region not being available, it looks like
HMaster may not have fully initialized.

Alternately, if HMaster is running correctly, did you override the default
value for zookeeper.znode.parent in your cluster configuration, but not set
this in your client code?
On Tue, Jul 9, 2013 at 10:05 AM, Brian Jeltema <
[EMAIL PROTECTED]> wrote:

> I'm new to HBase, and need a little guidance. I've set up a 6-node
> cluster, with 3 nodes
> running the ZooKeeper server. The database seems to be working from the
> hbase shell; I can create tables, insert,
> scan, etc.
>
> But when I try to perform operations in a Java app, I hang at:
>
> 13/07/09 12:40:34 INFO zookeeper.ZooKeeper: Initiating client connection,
> connectString=cas-2:2181,cas-1:2181,cas-3:2181 sessionTimeout=90000
> watcher=hconnection-0x6833f0de
> 13/07/09 12:40:34 INFO zookeeper.RecoverableZooKeeper: Process
> identifier=hconnection-0x6833f0de connecting to ZooKeeper
> ensemble=cas-2:2181,cas-1:2181,cas-3:2181
> 13/07/09 12:40:34 INFO zookeeper.ClientCnxn: Opening socket connection to
> server cas-1/10.4.0.1:2181. Will not attempt to authenticate using SASL
> (Unable to locate a login configuration)
> 13/07/09 12:40:34 INFO zookeeper.ClientCnxn: Socket connection established
> to cas-1/10.4.0.1:2181, initiating session
> 13/07/09 12:40:34 INFO zookeeper.ClientCnxn: Session establishment
> complete on server cas-1/10.4.0.1:2181, sessionid = 0x13fa5b5096e001f,
> negotiated timeout = 40000
> 13/07/09 12:40:34 INFO client.ZooKeeperRegistry: ClusterId read in
> ZooKeeper is null
>
> The Java code is nothing more than:
>
>             Configuration hConf = HBaseConfiguration.create();
>             hConf.set("hbase.zookeeper.quorum", "cas-1,cas-2,cas-3");
>             hConf.set("hbase.zookeeper.property.clientPort", "2181");
>             HTable hTable = new HTable(hConf, "tablename");
>
> a thread dump shows the app blocked:
>
> "main" prio=10 tid=0x00007f1424009000 nid=0x2976 waiting on condition
> [0x00007f142a0c3000]
>    java.lang.Thread.State: TIMED_WAITING (sleeping)
>         at java.lang.Thread.sleep(Native Method)
>         at
> org.apache.hadoop.hbase.zookeeper.ZKUtil.blockUntilAvailable(ZKUtil.java:1772)
>         at
> org.apache.hadoop.hbase.zookeeper.MetaRegionTracker.blockUntilAvailable(MetaRegionTracker.java:175)
>         at
> org.apache.hadoop.hbase.client.ZooKeeperRegistry.getMetaRegionLocation(ZooKeeperRegistry.java:58)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:806)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:896)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:809)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:778)
>         at
> org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:245)
>         at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:186)
>         at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:147)
>
> Any suggestions as to the cause?
>
> TIA
>
> Brian
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Brian Jeltema 2013-07-10, 15:47
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Brian Jeltema 2013-07-11, 13:09