Improve the handling of failed map output fetches
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Key: HADOOP-1042
URL: https://issues.apache.org/jira/browse/HADOOP-1042
Project: Hadoop
Issue Type: Improvement
Components: mapred
Affects Versions: 0.11.2
Reporter: Devaraj Das
Assigned To: Devaraj Das
Currently, whenever fetch of a map output fails the corresponding
MapOutputLocation is added to a List datastructure for later retrial. But, if
the failure was due to a lost task, the entry that was added is not deleted.
For such cases, unnecessary retrials will happen. This situation should be
prevented.
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