Hello devs, A (possible) dead loop is found when I use python-daemon and multiprocessing together in PyPy 4.0.1, which does not appear in Python(2.6 or 2.7). Also it does not appear in earlier PyPy versions (2.0.2) Reproduce: First install python-daemon: pypy_pip install python-daemon Use the following test script (also available in attachment): #!/usr/bin/pypy import daemon import multiprocessing def test(): q = multiprocessing.Queue(64) if __name__ == '__main__': with daemon.DaemonContext(): test() When executing the script with pypy: pypy test.py The background service does not exit, and is consuming 100% CPU: ps aux | grep pypy root 7769 99.1 0.5 235332 46812 ? R 17:52 2:09 pypy test.py root 7775 0.0 0.0 103252 804 pts/1 S+ 17:54 0:00 grep pypy Executing the script with python: python2.7 test.py And the background service normally exits. Environment: I'm using CentOS 6.5, with portable PyPy distribution for linux (https://bitbucket.org/squeaky/portable-pypy/downloads/pypy-4.0.1-linux_x86_6...) I run the script on system built-in python (python 2.6.6), a compiled CPython (2.7.11), and pypy from epel-release(pypy 2.0.2, python 2.7.2), and the problem does not appear. Though the compiled CPython is 2.7.11 and PyPy 4.0.4 is python 2.7.10, I think that does not matter much. Please contact if you have any questions or ideas. 2015-12-23 hubo
