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From Marco <marco....@gmail.com>
Subject Re: Cannot connect to Hbase via Java API
Date Thu, 18 Dec 2014 19:36:56 GMT
Hi Wilm,

I also think, I'll try it with a hbase standalone install. Also via
the logging of Apache Phoenix, I see that this framework can without
any issues use the region server and it's the same hbase-site.xml.,.

Nevertheless, thank you very much for your efforts!!!

Best wishes,
Marco

2014-12-18 17:43 GMT+01:00 Wilm Schumacher <wilm.schumacher@gmail.com>:
> Hi,
>
> I just took a look into the hdp 2.2 sandbox, and unfortunately it was a
> waste of time and I went older ;).
>
> At the first boot, without me doing anything in the configs, zookeeper
> throwed errors at startup and got killed (couldn't connect). However,
> ignoring this I started hbase, which hdp recommend doing by hand O_o
> (starting every service one by one). And the shell worked ... at first.
>
> Now I wanted to make it working and used a network bridge to ssh to the
> box (copy jars for test programs etc.). And now hbase services didn't
> want to start, because now it couldn't access the log files anymore
> (missing permissions) *scratch at head*. I gave permissions to the hbase
> user ... didn't work either. HMaster got killed immediately. After using
> a host-only network ... same problems. I didn't looked further into the
> problems, as I wanted to take only a small look at the product.
>
> After reimporting and a second try ... same problems. So, I couldn't
> reproduce your problem because I didn't get to your point of problems :(.
>
> As this is a standard VM thousands of people use the errors are most
> likely in my install of the VM, but it seems to be very easy to make
> mistakes and end up with a not usable install :/. Sry that this didn't
> help. But I think you should use a standard hbase standalone install to
> test hbase for your purposes.
>
> Best wishes and good luck
>
> Wilm
>
> Am 16.12.2014 um 15:19 schrieb Marco:
>> 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
>



-- 
Viele Grüße,
Marco

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