New submission from Eric Eisner <e...@mit.edu>: In multiprocessing, if you give a pool.map a zero-length iterator and specify a nonzero chunksize, the process hangs indefinitely. Example:
import multiprocessing pool = multiprocessing.Pool() pool.map(len, [], chunksize=1) # hang forever Attached simple testcase and simple fix. I observed this behavior on 2.6 and 3.1, but only verified the patch on 3.1. Unless the line numbers changed it will probably fix it on 2.6 as well. ---------- components: Library (Lib) files: map_testandfix.patch keywords: patch messages: 90228 nosy: ede severity: normal status: open title: multiprocessing: pool.map hangs on empty list type: crash versions: Python 2.6, Python 2.7, Python 3.0, Python 3.1 Added file: http://bugs.python.org/file14467/map_testandfix.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue6433> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
