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Hadoop >> mail # dev >> Unused API in LocalDirAllocator

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Unused API in LocalDirAllocator

Stumbled on the fact that LocalDirAllocator.ifExists() is not used
anywhere. The previous usage of this API was in the IsolationRunner
that was removed in MAPREDUCE-2606.

This API doesn't call the confChanged method and hence there is an
uninitialised variable that causes a NullPointerException. So, either
we can fix that, or remove the API if it's not required. This is also
one of the reasons why the IsolationRunner was broken in 1.0.

Thoughts ?