Hi, Can you please confirm that the line number 45 in ClosenessMessageWritable is as follows:
this.previous_bitstring[i] = in.readBoolean(); If its then try the following. Hopefully it will fix your problem @Override public void readFields(DataInput in) throws IOException { size=in.readInt(); previous_bitstring = new boolean[size]; for(int i=0;i<size;i++) { previous_bitstring[i] = DataInput.readBoolean(); } } On Nov 20, 2013 3:26 AM, "Jyoti Yadav" <rao.jyoti26ya...@gmail.com> wrote: > 2013-11-20 15:46:09,202 ERROR > org.apache.giraph.utils.LogStacktraceCallable: Execution of callable failed > > *java.lang.NullPointerException at > org.apache.giraph.examples.ClosenessMessageWritable.readFields(ClosenessMessageWritable.java:45)* > at > org.apache.giraph.utils.ByteArrayVertexIdMessages.readData(ByteArrayVertexIdMessages.java:77) > at > org.apache.giraph.utils.ByteArrayVertexIdMessages.readData(ByteArrayVertexIdMessages.java:34) > at > org.apache.giraph.utils.ByteArrayVertexIdData$VertexIdDataIterator.next(ByteArrayVertexIdData.java:221) > at > org.apache.giraph.comm.messages.primitives.LongByteArrayMessageStore.addPartitionMessages(LongByteArrayMessageStore.java:149) > at > org.apache.giraph.comm.requests.SendWorkerMessagesRequest.doRequest(SendWorkerMessagesRequest.java:73) > at > org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.doRequest(NettyWorkerClientRequestProcessor.java:482) > at > org.apache.giraph.comm.SendMessageCache.flush(SendMessageCache.java:247) > at > org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.flush(NettyWorkerClientRequestProcessor.java:415) > at > org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:203) > at > org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:70) > at > org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) > at java.util.concurrent.FutureTask.run(FutureTask.java:166) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:724) > 2013-11-20 15:46:09,204 ERROR org.apache.giraph.worker.BspServiceWorker: > unregisterHealth: Got failure, unregistering health on > /_hadoopBsp/job_201311200901_0018/_applicationAttemptsDir/0/_superstepDir/0/_workerHealthyDir/kanha-Vostro-1014_1 > on superstep 0 > 2013-11-20 15:46:09,261 INFO org.apache.hadoop.mapred.TaskLogsTruncater: > Initializing logs' truncater with mapRetainSize=-1 and reduceRetainSize=-1 > 2013-11-20 15:46:09,348 INFO org.apache.hadoop.io.nativeio.NativeIO: > Initialized cache for UID to User mapping with a cache timeout of 14400 > seconds. > 2013-11-20 15:46:09,348 INFO org.apache.hadoop.io.nativeio.NativeIO: Got > UserName hduser for UID 1001 from the native implementation > 2013-11-20 15:46:09,351 WARN org.apache.hadoop.mapred.Child: Error running > child > java.lang.IllegalStateException: run: Caught an unrecoverable exception > waitFor: ExecutionException occurred while waiting for > org.apache.giraph.utils.ProgressableUtils$FutureWaitable@16ea72c > at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:101) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:369) > at org.apache.hadoop.mapred.Child$4.run(Child.java:259) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:415) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059) > at org.apache.hadoop.mapred.Child.main(Child.java:253) > Caused by: java.lang.IllegalStateException: waitFor: ExecutionException > occurred while waiting for > org.apache.giraph.utils.ProgressableUtils$FutureWaitable@16ea72c > at > org.apache.giraph.utils.ProgressableUtils.waitFor(ProgressableUtils.java:181) > at > org.apache.giraph.utils.ProgressableUtils.waitForever(ProgressableUtils.java:139) > at > org.apache.giraph.utils.ProgressableUtils.waitForever(ProgressableUtils.java:124) > at > org.apache.giraph.utils.ProgressableUtils.getFutureResult(ProgressableUtils.java:87) > at > org.apache.giraph.utils.ProgressableUtils.getResultsWithNCallables(ProgressableUtils.java:221) > at > org.apache.giraph.graph.GraphTaskManager.processGraphPartitions(GraphTaskManager.java:741) > at > org.apache.giraph.graph.GraphTaskManager.execute(GraphTaskManager.java:286) > at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:91) > ... 7 more > Caused by: java.util.concurrent.ExecutionException: > java.lang.NullPointerException > at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:262) > at java.util.concurrent.FutureTask.get(FutureTask.java:119) > at > org.apache.giraph.utils.ProgressableUtils$FutureWaitable.waitFor(ProgressableUtils.java:300) > at > org.apache.giraph.utils.ProgressableUtils.waitFor(ProgressableUtils.java:173) > ... 14 more > Caused by: java.lang.NullPointerException > at > org.apache.giraph.examples.ClosenessMessageWritable.readFields(ClosenessMessageWritable.java:45) > at > org.apache.giraph.utils.ByteArrayVertexIdMessages.readData(ByteArrayVertexIdMessages.java:77) > at > org.apache.giraph.utils.ByteArrayVertexIdMessages.readData(ByteArrayVertexIdMessages.java:34) > at > org.apache.giraph.utils.ByteArrayVertexIdData$VertexIdDataIterator.next(ByteArrayVertexIdData.java:221) > at > org.apache.giraph.comm.messages.primitives.LongByteArrayMessageStore.addPartitionMessages(LongByteArrayMessageStore.java:149) > at > org.apache.giraph.comm.requests.SendWorkerMessagesRequest.doRequest(SendWorkerMessagesRequest.java:73) > at > org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.doRequest(NettyWorkerClientRequestProcessor.java:482) > at > org.apache.giraph.comm.SendMessageCache.flush(SendMessageCache.java:247) > at > org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.flush(NettyWorkerClientRequestProcessor.java:415) > at > org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:203) > at > org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:70) > at > org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) > at java.util.concurrent.FutureTask.run(FutureTask.java:166) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:724) > 2013-11-20 15:46:09,356 INFO org.apache.hadoop.mapred.Task: Runnning > cleanup for the task > 2013-11-20 15:46:09,408 WARN org.apache.hadoop.conf.Configuration: > /app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201311200901_0018/job.xml:a > attempt to override final parameter: dfs.data.dir; Ignoring. > 2013-11-20 15:46:09,412 WARN org.apache.hadoop.conf.Configuration: > /app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201311200901_0018/job.xml:a > attempt to override final parameter: dfs.name.dir; Ignoring. > > > On Wed, Nov 20, 2013 at 4:52 PM, Sebastian Schelter < > ssc.o...@googlemail.com> wrote: > >> What is the exact error message? >> >> On 20.11.2013 12:11, Jyoti Yadav wrote: >> > Thanks Sir for your suggestions... >> > I looked into the log files... >> > It is showing some error at readFields() method in >> > ClosenessMessageWritable.java file..You please have a look again whether >> > boolean array is serialized properly or not... >> > >> > I am doubtful about these serialization functions.. >> > >> > Thanks.. >> > >> > >> > On Wed, Nov 20, 2013 at 4:16 PM, Sebastian Schelter < >> ssc.o...@googlemail.com >> >> wrote: >> > >> >> It says "Failed map tasks=1", you should have a deeper look into the >> >> logfiles or into the web console of Hadoop to find out why the map task >> >> fails. >> >> >> >> On 20.11.2013 11:44, Jyoti Yadav wrote: >> >>> 13/11/20 15:56:28 INFO mapred.JobClient: Failed map tasks=1 >> >> >> >> >> > >> >> >