Hi: I am runing giraph with the SimpleMutateGraphVertex in local mode ,but when I look the tasklog ,it shows :
2014-11-13 21:46:32,572 ERROR org.apache.giraph.utils.LogStacktraceCallable: Execution of callable failed java.lang.ClassCastException: org.apache.giraph.worker.DefaultWorkerContext cannot be cast to org.apache.giraph.examples.SimpleMutateGraphVertex$SimpleMutateGraphVertexWorkerContext at org.apache.giraph.examples.SimpleMutateGraphVertex.compute(SimpleMutateGraphVertex.java:58) at org.apache.giraph.graph.ComputeCallable.computePartition(ComputeCallable.java:234) at org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:162) at org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:1) at org.apache.giraph.utils.LogStacktraceCallable.call(LogStacktraceCallable.java:51) at java.util.concurrent.FutureTask$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:722) Why, Could you help me??