the TaskTracker.Child.ping thread calls exit
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Key: HADOOP-133
URL: http://issues.apache.org/jira/browse/HADOOP-133
Project: Hadoop
Type: Bug
Components: mapred
Versions: 0.1.1
Reporter: Owen O'Malley
Assigned to: Owen O'Malley
The TaskTracker.Child.startPinging thread calls exit if the TaskTracker doesn't
respond. Calling exit in a mutli-threaded program is really problematic. In
particular, it prevents cleanup/finally clauses from running. We need to move
to a model where it uses Thread.interrupt(), which means we need to check the
interrupt flag in place in the map loop and reduce loop and stop masking the
InterruptExceptions.
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