Date: Tue, 17 Feb 2009 15:19:17 +0100 From: Johannes Scholz <lgoodboi@googlemail.com> To: freebsd-questions@freebsd.org Subject: processes hanging in _umtx_op #2 Message-ID: <596E71F5-CF59-4921-93E0-12C0DF9B3EDE@googlemail.com>
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Today i have upgraded python to 2.5.4 and all of the sudden most of my python processes seem to hang. I have managed to track down the problem to the MySQLdb module. A simple python -c "import MySQLdb" seemed to hang forever and i could only terminate it with kill -9. A similar problem seems to be documented in http://lists.freebsd.org/pipermail/freebsd-questions/2008-October/183675.html After reinstalling mysq51-client and py-MySQLdb everything went back to normal. Before doing so i ran ktrace on python -c "import MySQLdb". The result can be found on http://dpaste.com/121672/. Im just reporting this because i am not sure whether this is a library problem or an issue with freebsd. uname -a: FreeBSD somehost.fr 7.1-RELEASE-p2 FreeBSD 7.1-RELEASE-p2 #4: Tue Feb 3 15:41:02 CET 2009 root@somehost.fr:/usr/obj/usr/src/sys/IPEYES i386 options SCHED_4BSD # 4BSD scheduler Johannes Scholz
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