Created attachment 578830 [details] Test program to produce the python subprocess and thread bug Description of problem: python with a version lower than v2.7.3 and v3.2, have bad bugs in Pipe and Thread, it is a race condition. Version-Release number of selected component (if applicable): v2.7.2 How reproducible: often but not every time. Steps to Reproduce: 1. download the attachment as a test script. 2. run it for several times. 3. observe that if thread 1 hangs. Actual results: sometimes it hangs. Expected results: it should never hang. Additional info: Python 2.7.3 was just released on 11 April 2012, and my test script passed on it. When I spy on the source code of cpython project, I found no special patch fixing the bug, and the information I got is that many subprocess changes was back ported from python3.2+, and the mechanisms changes. Related python issue track: http://bugs.python.org/issue2320 I tested my script on some version of Python: result is: Python3: later than Python v3.2.2, pass. Python2: Python v2.7.3, pass. Python v2.7.2, fail. Python v2.7.2+(ubuntu), fail.
The update to 2.7.3 is here: https://admin.fedoraproject.org/updates/FEDORA-2012-5924/python-2.7.3-1.fc16,python-docs-2.7.3-1.fc16
Downloaded and tried, so far it is good, and wait for a update package available in yum.
(In reply to comment #2) > Downloaded and tried, so far it is good, and wait for a update package > available in yum. It is available in updates-testing: e.g. as root: "yum --enablerepo=updates-testing update python"
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