Hi Artie, Hopefully someone would give you a concrete answer. My rambling comments: Did you try with a smaller number of vertices? I want to know if the problem is due to increased load. What version of Giraph are you using?
Regards, Mohammad On Thursday, November 7, 2013 2:10 PM, Artie Pesh-Imam <[email protected]> wrote: Please let me know if any additional context would be useful. With no detail in the error message, I have no idea what the root issue could be. -- Artie Pesh-Imam Software Engineer @ Tapad 201-253-9647 ________________________________ From: Artie Pesh-Imam Artie Pesh-Imam Reply: Artie Pesh-Imam [email protected] Date: November 7, 2013 at 4:25:30 PM To: [email protected] [email protected] Subject: Null Pointer Exception when running a job Hi all, Im running a simple connected components algorithm against a graph of almost 200 million vertices. I have pretty much no guess on what this issue could be: java.lang.IllegalStateException: run: Caught an unrecoverable exception null at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:102) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:672) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:330) at org.apache.hadoop.mapred.Child$4.run(Child.java:268) 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:1408) at org.apache.hadoop.mapred.Child.main(Child.java:262) Caused by: java.lang.NullPointerException at org.apache.giraph.comm.SendCache.removeWorkerData(SendCache.java:157) at org.apache.giraph.comm.SendCache.removeAllData(SendCache.java:171) at org.apache.giraph.comm.SendMessageCache.removeAllMessages(SendMessageCache.java:92) at org.apache.giraph.comm.netty.NettyWorkerClientRequestProcessor.flush(NettyWorkerClientRequestProcessor.java:410) at org.apache.giraph.worker.BspServiceWorker.sendWorkerPartitions(BspServiceWorker.java:1316) at org.apache.giraph.worker.BspServiceWorker.exchangeVertexPartitions(BspServiceWorker.java:1361) at org.apache.giraph.graph.GraphTaskManager.execute(GraphTaskManager.java:255) at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:92) -- Artie Pesh-Imam Software Engineer @ Tapad 201-253-9647
