Unable to complete a full fetch, reason Child Error

[Gal Nitzan]

During fetch all tasktrackers aborting the fetch with:

task_m_b45ma2 Child Error
java.io.IOException: Task process exit with nonzero status.
        at
org.apache.hadoop.mapred.TaskRunner.runChild(TaskRunner.java:144)
        at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:97)