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From Lvxuedong <lxd.1...@gmail.com>
Subject Re: Why my distributed mode does not work?
Date Tue, 16 Apr 2013 15:07:05 GMT
Hi, Edward, thank you. But your suggestion seems do not work, do you have some other advice
?

Is java.lang.NullPointerException related with heap size ?



在 2013-4-16,22:13,"Edward J. Yoon" <edwardyoon@apache.org> 写道:

> I guess you need to increase the child processor JVM heap size.
> 
> - conf/hama-site.xml:
> 
>  <property>
>    <name>bsp.child.java.opts</name>
>    <value>-Xmx2048m</value>
>  </property>
> 
> On Tue, Apr 16, 2013 at 10:55 PM, Lyu Xuedong <lxd.1990@gmail.com> wrote:
>> My project can work well in eclipse, but when I export it as a jar file and
>> submit it to a two-node hama cluster, some errors and fatal occur if the
>> input file is over 64M.
>> I suspect that my configure files of hadoop or hama is somewhere not right,
>> but a pi estimator can run normally on my cluster and
>> GroomServer$BSPPerChild can be seen on each nodes. I debug for a whole day,
>> nothing improved.
>> What in my input file are a large number of RDF triples: "<subject>
>> <predicate> <object> ." My task is to create vertices for subjects and
>> objects. Predicates are subjects' edges.
>> What should I do ?
>> 
>> Terminal output:
>> 
>> 13/04/16 21:13:36 INFO bgp.HamaBgpComplete: Job begain.
>> 13/04/16 21:13:37 INFO bsp.FileInputFormat: Total input paths to process : 2
>> 13/04/16 21:13:38 INFO bsp.BSPJobClient: Running job: job_201304161357_0015
>> 13/04/16 21:13:41 INFO bsp.BSPJobClient: Current supersteps number: 0
>> 13/04/16 21:13:47 INFO bsp.BSPJobClient: Current supersteps number: 2
>> 13/04/16 21:13:53 INFO bsp.BSPJobClient: Current supersteps number: 3
>> 13/04/16 21:13:59 INFO bsp.BSPJobClient: Current supersteps number: 4
>> 13/04/16 21:14:05 INFO bsp.BSPJobClient: Current supersteps number: 5
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO
>> sync.ZKSyncClient: Initializing ZK Sync Client
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO
>> sync.ZooKeeperSyncClientImpl: Start connecting to Zookeeper! At
>> hadoop1/1.2.3.4:61002
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO ipc.Server:
>> Starting SocketReader
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO ipc.Server: IPC
>> Server Responder: starting
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO ipc.Server: IPC
>> Server handler 0 on 61002: starting
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO
>> message.HadoopMessageManagerImpl:  BSPPeer address:hadoop1 port:61002
>> attempt_201304161357_0015_000000_0: 13/04/16 21:13:43 INFO ipc.Server: IPC
>> Server listener on 61002: starting
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:03 ERROR bsp.BSPTask:
>> Error running bsp setup and bsp function.
>> attempt_201304161357_0015_000000_0: java.lang.NullPointerException
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 INFO ipc.Server:
>> Stopping server on 61002
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 INFO ipc.Server: IPC
>> Server handler 0 on 61002: exiting
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 INFO ipc.Server:
>> Stopping IPC Server listener on 61002
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 INFO ipc.Server:
>> Stopping IPC Server Responder
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 INFO
>> metrics.RpcInstrumentation: shut down
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 ERROR bsp.BSPTask:
>> Shutting down ping service.
>> attempt_201304161357_0015_000000_0: 13/04/16 21:14:04 FATAL bsp.GroomServer:
>> Error running child
>> attempt_201304161357_0015_000000_0: java.lang.NullPointerException
>> attempt_201304161357_0015_000000_0: java.lang.NullPointerException
>> 13/04/16 21:15:11 INFO bsp.BSPJobClient: Job failed.
>> 
>> tasklogs:
>> attempt_201304161357_0015_000000_0.log
>> 13/04/16 21:13:43 INFO sync.ZKSyncClient: Initializing ZK Sync Client
>> 13/04/16 21:13:43 INFO sync.ZooKeeperSyncClientImpl: Start connecting to
>> Zookeeper! At hadoop1/1.2.3.4:61002
>> 13/04/16 21:13:43 INFO ipc.Server: Starting SocketReader
>> 13/04/16 21:13:43 INFO ipc.Server: IPC Server Responder: starting
>> 13/04/16 21:13:43 INFO ipc.Server: IPC Server handler 0 on 61002: starting
>> 13/04/16 21:13:43 INFO message.HadoopMessageManagerImpl:  BSPPeer
>> address:hadoop1 port:61002
>> 13/04/16 21:13:43 INFO ipc.Server: IPC Server listener on 61002: starting
>> 13/04/16 21:14:03 ERROR bsp.BSPTask: Error running bsp setup and bsp
>> function.
>> java.lang.NullPointerException
>> 13/04/16 21:14:04 INFO ipc.Server: Stopping server on 61002
>> 13/04/16 21:14:04 INFO ipc.Server: IPC Server handler 0 on 61002: exiting
>> 13/04/16 21:14:04 INFO ipc.Server: Stopping IPC Server listener on 61002
>> 13/04/16 21:14:04 INFO ipc.Server: Stopping IPC Server Responder
>> 13/04/16 21:14:04 INFO metrics.RpcInstrumentation: shut down
>> 13/04/16 21:14:04 ERROR bsp.BSPTask: Shutting down ping service.
>> 13/04/16 21:14:04 FATAL bsp.GroomServer: Error running child
>> java.lang.NullPointerException
>> java.lang.NullPointerException
>> 
>> attempt_201304161357_0015_000001_0.log
>> 13/04/16 21:13:42 INFO sync.ZKSyncClient: Initializing ZK Sync Client
>> 13/04/16 21:13:42 INFO sync.ZooKeeperSyncClientImpl: Start connecting to
>> Zookeeper! At hadoop1/1.2.3.4:61001
>> 13/04/16 21:13:42 ERROR sync.ZooKeeperSyncClientImpl:
>> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode =
>> NoNode for /bsp/job_201304161357_0015/peers
>> 13/04/16 21:13:42 INFO ipc.Server: Starting SocketReader
>> 13/04/16 21:13:42 INFO ipc.Server: IPC Server Responder: starting
>> 13/04/16 21:13:42 INFO message.HadoopMessageManagerImpl:  BSPPeer
>> address:hadoop1 port:61001
>> 13/04/16 21:13:42 INFO ipc.Server: IPC Server listener on 61001: starting
>> 13/04/16 21:13:42 INFO ipc.Server: IPC Server handler 0 on 61001: starting
>> 13/04/16 21:14:06 ERROR bsp.BSPPeerImpl: Error while sending messages
>> java.io.IOException: Call to hadoop1/1.2.3.4:61002 failed on local
>> exception: java.io.EOFException
>>    at org.apache.hadoop.ipc.Client.wrapException(Client.java:1103)
>>    at org.apache.hadoop.ipc.Client.call(Client.java:1071)
>>    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
>>    at $Proxy3.put(Unknown Source)
>>    at
>> org.apache.hama.bsp.message.HadoopMessageManagerImpl.transfer(HadoopMessageManagerImpl.java:108)
>>    at org.apache.hama.bsp.BSPPeerImpl.sync(BSPPeerImpl.java:410)
>>    at org.apache.hama.graph.GraphJobRunner.bsp(GraphJobRunner.java:118)
>>    at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:166)
>>    at org.apache.hama.bsp.BSPTask.run(BSPTask.java:143)
>>    at
>> org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1266)
>> Caused by: java.io.EOFException
>>    at java.io.DataInputStream.readInt(DataInputStream.java:375)
>>    at
>> org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:800)
>>    at org.apache.hadoop.ipc.Client$Connection.run(Client.java:745)
> 
> 
> 
> -- 
> Best Regards, Edward J. Yoon
> @eddieyoon

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