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Herbert Poul
herbert.poul at gmail.com
Sun Apr 27 16:18:56 EDT 2008
hi, i stumbled across a problem which has been reported a year ago called "Python 2.3 and simplified GIL state API still causes problems.": http://issues.apache.org/jira/browse/MODPYTHON-217 and wondered if there are any plans to fix it or any known workarounds. in short: i am trying to get the python wrapper of xapian (based on swig, which in turn uses simplified GIL api) working in mod_python - but every call to this C extension ends in a deadlock. it seems this problem arises because of the combination of mod_python using PyEval_AcquireLock and the SWIG wrapper using simplified GIL (PyGILState_Ensure) is this actually anything that needs fixing in mod_python, or in the python wrapper/SWIG ? i would appreciate any pointers. (i have already tried using 'PythonInterpreter main_interpreter' but it doesn't help) thanks & cu, herbert P.S.: i am using apache 2.2.4 / mod_python 3.3.1 / python 2.5.1 - see attachment for the backtrace of the deadlock. P.P.S.: there is also a bug report for xapian because of this: http://trac.xapian.org/ticket/185 -------------- next part -------------- (gdb) bt #0 0xb7d2d279 in sem_wait at GLIBC_2.0 () from /lib/libpthread.so.0 #1 0xb759c06e in PyThread_acquire_lock () from /usr/lib/libpython2.5.so.1.0 #2 0xb756ab87 in PyEval_RestoreThread () from /usr/lib/libpython2.5.so.1.0 #3 0xb7591886 in PyGILState_Ensure () from /usr/lib/libpython2.5.so.1.0 #4 0xb63b99c6 in _wrap_new_Database (self=0x0, args=0x91415cc) at modern/xapian_wrap.cc:909 #5 0xb752341d in PyCFunction_Call () from /usr/lib/libpython2.5.so.1.0 #6 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #7 0xb756ed1b in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #8 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #9 0xb750f65a in PyClassMethod_New () from /usr/lib/libpython2.5.so.1.0 #10 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #11 0xb74f4fb5 in PyClass_IsSubclass () from /usr/lib/libpython2.5.so.1.0 #12 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #13 0xb7538bfe in _PyType_Lookup () from /usr/lib/libpython2.5.so.1.0 #14 0xb7537f85 in PyType_IsSubtype () from /usr/lib/libpython2.5.so.1.0 #15 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #16 0xb756c15c in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #17 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #18 0xb7570433 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #19 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #20 0xb7570433 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #21 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #22 0xb750f730 in PyClassMethod_New () from /usr/lib/libpython2.5.so.1.0 #23 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #24 0xb756ed1b in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #25 0xb7570b00 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #26 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #27 0xb750f65a in PyClassMethod_New () from /usr/lib/libpython2.5.so.1.0 #28 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #29 0xb74f4fb5 in PyClass_IsSubclass () from /usr/lib/libpython2.5.so.1.0 #30 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #31 0xb7538fb9 in _PyType_Lookup () from /usr/lib/libpython2.5.so.1.0 #32 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #33 0xb756c15c in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 ---Type <return> to continue, or q <return> to quit--- #34 0xb7570b00 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #35 0xb7570b00 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #36 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #37 0xb7570433 in PyEval_EvalFrameEx () from /usr/lib/libpython2.5.so.1.0 #38 0xb7571fc4 in PyEval_EvalCodeEx () from /usr/lib/libpython2.5.so.1.0 #39 0xb750f65a in PyClassMethod_New () from /usr/lib/libpython2.5.so.1.0 #40 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #41 0xb74f4fb5 in PyClass_IsSubclass () from /usr/lib/libpython2.5.so.1.0 #42 0xb74ed7b7 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #43 0xb74eda33 in PyObject_Call () from /usr/lib/libpython2.5.so.1.0 #44 0xb74efde2 in PyObject_CallMethod () from /usr/lib/libpython2.5.so.1.0 #45 0xb761b7e9 in python_handler () from /usr/lib/apache2/modules/mod_python.so #46 0xb761dcb4 in PythonHandler () from /usr/lib/apache2/modules/mod_python.so #47 0x08078ec9 in ap_run_handler () #48 0x0807c0d7 in ap_invoke_handler () #49 0x080891c8 in ap_process_request () #50 0x080864cb in ap_register_input_filter () #51 0x0807fe79 in ap_run_process_connection () #52 0x0808d0d0 in ap_graceful_stop_signalled () #53 0x0808d3c7 in ap_graceful_stop_signalled () #54 0x0808d484 in ap_graceful_stop_signalled () #55 0x0808df09 in ap_mpm_run () #56 0x08066c85 in main ()
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