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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Cannot connect to Hbase via Java API
Date Tue, 16 Dec 2014 15:36:11 GMT
bq. conf.set("hbase.zookeeper.quorum", "ip:2181");

Have you tried omitting port in the above config ?

On Tue, Dec 16, 2014 at 6:19 AM, Marco <marco.frg@gmail.com> wrote:
>
> Hi,
>
> Hbase is installed correctly and working (hbase shell works fine).
>
> But I'm not able to use the Java API to connect to an existing Hbase Table:
>
> <<<
> val conf = HBaseConfiguration.create()
>
> conf.clear()
>
> conf.set("hbase.zookeeper.quorum", "ip:2181");
> conf.set("hbase.zookeeper.property.clientPort", "2181");
> conf.set("hbase.zookeeper.dns.nameserver", "ip");
> conf.set("hbase.regionserver.port","60020");
> conf.set("hbase.master", "ip:60000");
>
> val hTable = new HTable(conf, "truck_events")
>
> >>>
>
> Actually the coding is Scala but I think it is understandable, what I
> am trying to achieve. I've tried also to use hbase-site.xml instead of
> manually configuring it -  but the result is the same.
>
> As response I got
> 14/12/16 15:10:05 INFO zookeeper.ZooKeeper: Initiating client
> connection, connectString=ip:2181 sessionTimeout=30000
> watcher=hconnection
> 14/12/16 15:10:10 INFO zookeeper.ClientCnxn: Opening socket connection
> to server ip:2181. Will not attempt to authenticate using SASL
> (unknown error)
> 14/12/16 15:10:10 INFO zookeeper.ClientCnxn: Socket connection
> established to ip:2181, initiating session
> 14/12/16 15:10:10 INFO zookeeper.ClientCnxn: Session establishment
> complete on server ip:2181, sessionid = 0x14a53583e080010, negotiated
> timeout = 30000
>
> and then finally after a couple of minutes: (the constructor call of
> HTable is hanging)
>
> [error] (run-main-0)
> org.apache.hadoop.hbase.client.NoServerForRegionException: Unable to
> find region for truck_events,,99999999999999 after 14 tries.
> org.apache.hadoop.hbase.client.NoServerForRegionException: Unable to
> find region for truck_events,,99999999999999 after 14 tries.
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1092)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:997)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1099)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:1001)
>         at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:958)
>         at
> org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:251)
>         at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:155)
>         at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:129)
>         at HbaseConnector$.main(HbaseConnector.scala:18)
>         at HbaseConnector.main(HbaseConnector.scala)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:606)
> [trace] Stack trace suppressed: run last compile:run for the full output.
> 14/12/16 13:22:15 ERROR zookeeper.ClientCnxn: Event thread exiting due
> to interruption
> java.lang.InterruptedException
>         at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2017)
>         at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2052)
>         at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
>         at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:491)
> 14/12/16 13:22:15 INFO zookeeper.ClientCnxn: EventThread shut down
> java.lang.RuntimeException: Nonzero exit code: 1
>         at scala.sys.package$.error(package.scala:27)
> [trace] Stack trace suppressed: run last compile:run for the full output.
> [error] (compile:run) Nonzero exit code: 1
> [error] Total time: 1106 s, completed Dec 16, 2014 1:22:15 PM
>
>
> In the RegionServer log, I've seen this:
>
> 2014-12-16 13:31:34,087 DEBUG [RpcServer.listener,port=60020]
> ipc.RpcServer: RpcServer.listener,port=60020: connection from
> 10.97.68.159:41772; # active connections: 1
> 2014-12-16 13:33:34,220 DEBUG [RpcServer.reader=1,port=60020]
> ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client
> 10.97.68.159:41772 because read count=-1. Number of active
> connections: 1
> 2014-12-16 13:36:26,988 DEBUG [LruStats #0] hfile.LruBlockCache:
> Total=430.02 KB, free=401.18 MB, max=401.60 MB, blockCount=4,
> accesses=28, hits=24, hitRatio=85.71%, , cachingAccesses=28,
> cachingHits=24, cachingHitsRatio=85.71%, evictions=269, evicted=0,
> evictedPerRun=0.0
> 2014-12-16 13:36:34,017 DEBUG [RpcServer.listener,port=60020]
> ipc.RpcServer: RpcServer.listener,port=60020: connection from
> 10.97.68.159:42728; # active connections: 1
> 2014-12-16 13:38:34,112 DEBUG [RpcServer.reader=2,port=60020]
> ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client
> 10.97.68.159:42728 because read count=-1. Number of active
> connections: 1
> 2014-12-16 13:41:26,989 DEBUG [LruStats #0] hfile.LruBlockCache:
> Total=430.02 KB, free=401.18 MB, max=401.60 MB, blockCount=4,
> accesses=30, hits=26, hitRatio=86.67%, , cachingAccesses=30,
> cachingHits=26, cachingHitsRatio=86.67%, evictions=299, evicted=0,
> evictedPerRun=0.0
>
> So it connects and disconnects with read count -1 .
>
> Can anybody help me finding the root cause of this issue ? I've tried
> to restart Hbase and so on but with no effect. Hive is also working
> fine, just not my coding :(
>
> Thanks a lot,
> Marco
>

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