Multiprocessing Pool.map_async() does not have an error_callback paramter as described here http://docs.python.org/library/multiprocessing.html#multiprocessing.pool.multiprocessing.Pool.map_async

I assume this is an old configuration that no longer works... I tried to call that parameter by name and I got a Type Error, plus the actual documentation does not mention it at all (and it is missing from similar functions). Recommend it be removed from the documentation, or else better described and implemented.

Python 3.x seems to have the error_callback parameter on all *_async operations. However, 2.7 lacks it. I think adding the actual error_callback would be deemed as a new feature, so the right thing would just be removing the documentation.

I'll whip up a patch to remove this from the documentation

Patch attached. This patch removes the error_callback from 2.7's documentation.

Also: note that 2.6 does not document this error_callback, so the issue is present only in 2.7

New changeset 37e34a983d6d by Senthil Kumaran in branch '2.7':
Fix Issue13147 - Correct the Multiprocessing Pool.map_async method signature.
http://hg.python.org/cpython/rev/37e34a983d6d

Thanks for the report, Jakub and for the patch, Jyrki