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From Artie Pesh-Imam <artie.pesh-i...@tapad.com>
Subject Re: Null Pointer Exception when running a job
Date Thu, 07 Nov 2013 22:09:43 GMT
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 artie.pesh-imam@tapad.com
Date: November 7, 2013 at 4:25:30 PM
To: user@giraph.apache.org user@giraph.apache.org
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
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