> Hi,
> I have just started with apache giraph. While trying to run shortest
> path example.
>
>
> hadoop jar
> giraph-0.2-SNAPSHOT-for-hadoop-0.20.203.0-jar-with-dependencies.jar
> org.apache.giraph.GiraphRunner
> org.apache.giraph.examples.ConnectedComponentsVertex -if
> org.apache.giraph.io.JsonBase64VertexOutputFormat -ip
> /user/bageera/shortestPathsInputGraph/ -of
> org.apache.giraph.io.JsonBase64VertexOutputFormat -op SPOG13 0 -w 3
>
>
> I am getting the following error at master node.
>
> java.lang.Throwable: Child Error
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)
>
>
>
> *syslog logs*
>
> askTracker/bageera/jobcache/job_201303141821_0004/attempt_201303141821_0004_m_000000_0/work
> 2013-03-14 18:40:49,926 INFO org.apache.zookeeper.ZooKeeper: Initiating
> client connection, connectString=Nintendo:22181 sessionTimeout=60000
> watcher=org.apache.giraph.graph.BspServiceMaster@1a0fba0
> 2013-03-14 18:40:49,935 INFO org.apache.zookeeper.ClientCnxn: Opening socket
> connection to server Nintendo/10.129.30.126:22181
> 2013-03-14 18:40:49,936 INFO org.apache.zookeeper.ClientCnxn: Socket
> connection established to Nintendo/10.129.30.126:22181, initiating session
> 2013-03-14 18:40:50,001 INFO org.apache.zookeeper.ClientCnxn: Session
> establishment complete on server Nintendo/10.129.30.126:22181, sessionid =
> 0x13d690633dc0000, negotiated timeout = 600000
> 2013-03-14 18:40:50,003 INFO org.apache.giraph.graph.BspService: process:
> Asynchronous connection complete.
> 2013-03-14 18:40:50,007 INFO org.apache.giraph.graph.GraphMapper: map: No
> need to do anything when not a worker
> 2013-03-14 18:40:50,007 INFO org.apache.giraph.graph.GraphMapper: cleanup:
> Starting for MASTER_ZOOKEEPER_ONLY
> 2013-03-14 18:40:50,106 INFO org.apache.giraph.graph.BspServiceMaster:
> becomeMaster: First child is
> '/_hadoopBsp/job_201303141821_0004/_masterElectionDir/Nintendo_00000000000'
> and my bid is
> '/_hadoopBsp/job_201303141821_0004/_masterElectionDir/Nintendo_00000000000'
> 2013-03-14 18:40:50,163 INFO org.apache.giraph.comm.netty.NettyServer:
> NettyServer: Using execution handler with 8 threads after requestFrameDecoder.
> 2013-03-14 18:40:50,169 INFO org.apache.giraph.graph.BspService: process:
> applicationAttemptChanged signaled
> 2013-03-14 18:40:50,187 INFO org.apache.giraph.comm.netty.NettyServer: start:
> Started server communication server: Nintendo/10.129.30.126:30000 with up to
> 16 threads on bind attempt 0 with sendBufferSize = 32768 receiveBufferSize =
> 524288 backlog = 2
> 2013-03-14 18:40:50,190 INFO org.apache.giraph.comm.netty.NettyClient:
> NettyClient: Using execution handler with 8 threads after requestEncoder.
> 2013-03-14 18:40:50,193 INFO org.apache.giraph.graph.BspServiceMaster:
> becomeMaster: I am now the master!
> 2013-03-14 18:40:50,218 INFO org.apache.giraph.graph.BspService:
> getApplicationAttempt: Node
> /_hadoopBsp/job_201303141821_0004/_applicationAttemptsDir already exists!
> 2013-03-14 18:40:50,251 WARN org.apache.giraph.graph.BspService: process:
> Unknown and unprocessed event
> (path=/_hadoopBsp/job_201303141821_0004/_applicationAttemptsDir/0/_superstepDir,
> type=NodeChildrenChanged, state=SyncConnected)
> 2013-03-14 18:40:52,936 FATAL org.apache.giraph.graph.GraphMapper:
> uncaughtException: OverrideExceptionHandler on thread
> org.apache.giraph.graph.MasterThread, msg = generateVertexInputSplits: Got
> IOException, exiting...
> java.lang.IllegalStateException: generateVertexInputSplits: Got IOException
> at
> org.apache.giraph.graph.BspServiceMaster.generateInputSplits(BspServiceMaster.java:268)
> at
> org.apache.giraph.graph.BspServiceMaster.createInputSplits(BspServiceMaster.java:568)
> at
> org.apache.giraph.graph.BspServiceMaster.createVertexInputSplits(BspServiceMaster.java:633)
> at org.apache.giraph.graph.MasterThread.run(MasterThread.java:102)
> Caused by: java.io.IOException: No input paths specified in job
> at
> org.apache.giraph.io.GiraphFileInputFormat.listStatus(GiraphFileInputFormat.java:191)
> at
> org.apache.giraph.io.GiraphFileInputFormat.listVertexStatus(GiraphFileInputFormat.java:251)
> at
> org.apache.giraph.io.GiraphFileInputFormat.getVertexSplits(GiraphFileInputFormat.java:322)
> at
> org.apache.giraph.io.TextVertexInputFormat.getSplits(TextVertexInputFormat.java:61)
> at
> org.apache.giraph.graph.BspServiceMaster.generateInputSplits(BspServiceMaster.java:266)
> ... 3 more
> 2013-03-14 18:40:52,937 INFO org.apache.giraph.zk.ZooKeeperManager: run:
> Shutdown hook started.
> 2013-03-14 18:40:52,937 WARN org.apache.giraph.zk.ZooKeeperManager:
> onlineZooKeeperServers: Forced a shutdown hook kill of the ZooKeeper process.
> 2013-03-14 18:40:53,255 INFO org.apache.giraph.zk.ZooKeeperManager:
> onlineZooKeeperServers: ZooKeeper process exited with 143 (note that 143
> typically means killed)
>
>
>
> This is the most common error people are getting but I am unable to find
> the solution.
> Plz help.
>
> Thanks,
> M.Vasimuddin
>
>
>
