Exception "Already has missing vertex on this worker"

[Yingyi Bu]

Hi,

I got this exception when I ran a Giraph-1.0.0 PageRank job over a 60
machine cluster with 28GB input data.  But I got this exception:

java.lang.IllegalStateException: run: Caught an unrecoverable
exception resolveMutations: Already has missing vertex on this worker
for 20464109
        at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:102)
        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: resolveMutations: Already
has missing vertex on this worker for 20464109
        at 
org.apache.giraph.comm.netty.NettyWorkerServer.resolveMutations(NettyWorkerServer.java:184)
        at 
org.apache.giraph.comm.netty.NettyWorkerServer.prepareSuperstep(NettyWorkerServer.java:152)
        at 
org.apache.giraph.worker.BspServiceWorker.startSuperstep(BspServiceWorker.java:677)
        at 
org.apache.giraph.graph.GraphTaskManager.execute(GraphTaskManager.java:249)
        at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:92)
        ... 7 more

Does anyone know what is the possible cause of this exception?

Thanks!

Yingyi