Task process exit with nonzero status of 65

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Task process exit with nonzero status of 65

Ned Rockson-3
We recently upgraded to hadoop 0.15 and have seen a lot of these messages on every map/reduce in the nutch trunk package:

java.io.IOException: Task process exit with nonzero status of 65.
        at org.apache.hadoop.mapred.TaskRunner.runChild(TaskRunner.java:436)
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:292)

My own map reduces haven't given me this message yet, only Fetcher2 and ParseSegment, for the most part.  What could be causing this?

Thanks,
Ned