Hi.. I faced some error at runtime....
Error running child java.lang.IllegalStateException: run: Caught an unrecoverable exception waitFor: ExecutionException occurred while waiting for org.apache.giraph.utils.ProgressableUtils$FutureWaitable@1a1d638 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@1a1d638 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.worker.BspServiceWorker.loadInputSplits(BspServiceWorker.java:283) at org.apache.giraph.worker.BspServiceWorker.loadVertices(BspServiceWorker.java:327) at org.apache.giraph.worker.BspServiceWorker.setup(BspServiceWorker.java:508) at org.apache.giraph.graph.GraphTaskManager.execute(GraphTaskManager.java:246) at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:91) ... 7 more Caused by: java.util.concurrent.ExecutionException: *java.lang.OutOfMemoryError: Java heap space* 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) ... 16 more Caused by: java.lang.OutOfMemoryError: Java heap space at org.apache.giraph.edge.ByteArrayEdges.readFields(ByteArrayEdges.java:177) at org.apache.giraph.utils.WritableUtils.reinitializeVertexFromDataInput(WritableUtils.java:524) at org.apache.giraph.utils.VertexIterator.next(VertexIterator.java:98) at org.apache.giraph.partition.BasicPartition.addPartitionVertices(BasicPartition.java:99) at org.apache.giraph.comm.requests.SendWorkerVerticesRequest.doRequest(SendWorkerVerticesRequest.java:110) at org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.doRequest(NettyWorkerClientRequestProcessor.java:482) at org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.flush(NettyWorkerClientRequestProcessor.java:428) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:241) at org.apache.giraph.worker.InputSplitsCallable.call(InputSplitsCallable.java:60) 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) Any ideas to fix it??? Thanks Jyoti..