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[Jython-bugs] [ jython-Bugs-1227282 ] Deadlock between PythonTraceFunction.safeCall() and imp.im
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From: SourceForge.net <no...@so...> - 2005-06-24 21:49:09
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Bugs item #1227282, was opened at 2005-06-24 14:44 Message generated for change (Comment added) made by nobody You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=112867&aid=1227282&group_id=12867 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Core Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Deadlock between PythonTraceFunction.safeCall() and imp.im Initial Comment: I have been using Marathon (a gui testing framework) and I have seen a deadlock between org.python.core.imp.importName() and org.python.core.PythonTraceFunction.safeCall() (stack trace below). imp.importName is a static method, so for now I removed the synchronized keyword from the method declarition of PythonTraceFunction.safeCall() and then put the whole method inside to synchronized blocks. First I synchronized on imp.class (since imp.importName is a static method) and then I synchronized on this (the current instance of PythonTraceFunction). This seems to have fixed the problem. I have not run any of the tests, so I don't know if this might cause other problems. STACK TRACE: [java] Found one Java-level deadlock: [java] ============================= [java] "Thread-2": [java] waiting to lock monitor 0x08096a74 (object 0x48c29cd0, a java.lang.Class), [java] which is held by "Python Playback Thread" [java] "Python Playback Thread": [java] waiting to lock monitor 0x08096b1c (object 0x448512c8, a org.python.core.PythonTraceFunction), [java] which is held by "Thread-2" [java] Java stack information for the threads listed above: [java] =================================================== [java] "Thread-2": [java] at org.python.core.imp.importName(imp.java) [java] - waiting to lock <0x48c29cd0> (a java.lang.Class) [java] at org.python.core.ImportFunction.load(__builtin__.java) [java] at org.python.core.ImportFunction.__call__(__builtin__.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at org.python.core.__builtin__.__import__(__builtin__.java) [java] at org.python.core.imp.importFromAs(imp.java) [java] at org.python.core.imp.importFrom(imp.java) [java] at org.python.pycode._pyx11._Debugger__shouldignore$5(debugger.py:33) [java] at org.python.pycode._pyx11.call_function(debugger.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyInstance.invoke(PyInstance.java) [java] at org.python.pycode._pyx11._Debugger__trace$3(debugger.py:15) [java] at org.python.pycode._pyx11.call_function(debugger.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyMethod.__call__(PyMethod.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at org.python.core.PyObject.invoke(PyObject.java) [java] at org.python.pycode._pyx11.trace$2(debugger.py:8) [java] at org.python.pycode._pyx11.call_function(debugger.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyMethod.__call__(PyMethod.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at org.python.core.PythonTraceFunction.safeCall(PythonTraceFunction.java) [java] - locked <0x448512c8> (a org.python.core.PythonTraceFunction) [java] at org.python.core.PythonTraceFunction.traceCall(PythonTraceFunction.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyMethod.__call__(PyMethod.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at org.python.modules.FunctionThread.run(thread.java) [java] "Python Playback Thread": [java] at org.python.core.PythonTraceFunction.safeCall(PythonTraceFunction.java) [java] - waiting to lock <0x448512c8> (a org.python.core.PythonTraceFunction) [java] at org.python.core.PythonTraceFunction.traceCall(PythonTraceFunction.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyCode.call(PyCode.java) [java] at org.python.core.imp.createFromCode(imp.java) [java] at org.python.core.imp.createFromPyClass(imp.java) [java] at org.python.core.imp.loadFromPath(imp.java) [java] at org.python.core.imp.loadFromPath(imp.java) [java] at org.python.core.imp.load(imp.java) [java] at org.python.core.imp.import_next(imp.java) [java] at org.python.core.imp.import_name(imp.java) [java] at org.python.core.imp.importName(imp.java) [java] - locked <0x48c29cd0> (a java.lang.Class) [java] at org.python.core.ImportFunction.load(__builtin__.java) [java] at org.python.core.ImportFunction.__call__(__builtin__.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at org.python.core.__builtin__.__import__(__builtin__.java) [java] at org.python.modules.os.classDictInit(os.java) [java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [java] at java.lang.reflect.Method.invoke(Method.java:324) [java] at org.python.core.PyJavaClass.initialize(PyJavaClass.java) [java] - locked <0x447e9df8> (a org.python.core.PyJavaClass) [java] at org.python.core.PyJavaClass.lookupGivingClass(PyJavaClass.java) [java] at org.python.core.PyClass.lookup(PyClass.java) [java] at org.python.core.PyJavaClass.__findattr__(PyJavaClass.java) [java] at org.python.core.imp.importFromAs(imp.java) [java] at org.python.core.imp.importFrom(imp.java) [java] at marathon.playback$py.window$5(libpy/marathon/playback.py:31) [java] at marathon.playback$py.call_function(libpy/marathon/playback.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.pycode._pyx10.test$1(/export/crane2/users/jgreenwa/build-dir/trunk/build-artifacts/linux/tests/classes/gui/marathon/TestCases/test1.py:10) [java] at org.python.pycode._pyx10.call_function(/export/crane2/users/jgreenwa/build-dir/trunk/build-artifacts/linux/tests/classes/gui/marathon/TestCases/test1.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [java] at java.lang.reflect.Method.invoke(Method.java:324) [java] at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java) [java] at org.python.core.PyMethod.__call__(PyMethod.java) [java] at org.python.core.PyObject._callextra(PyObject.java) [java] at marathon.results$py.callprotected$3(libpy/marathon/results.py:16) [java] at marathon.results$py.call_function(libpy/marathon/results.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyInstance.invoke(PyInstance.java) [java] at marathon.playback$py.execTest$2(libpy/marathon/playback.py:17) [java] at marathon.playback$py.call_function(libpy/marathon/playback.py) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyTableCode.call(PyTableCode.java) [java] at org.python.core.PyFunction.__call__(PyFunction.java) [java] at org.python.core.PyMethod.__call__(PyMethod.java) [java] at org.python.core.PyObject.__call__(PyObject.java) [java] at net.sourceforge.marathon.runtime.python.PythonScript$1.run(PythonScript.java:157) ---------------------------------------------------------------------- Comment By: Nobody/Anonymous (nobody) Date: 2005-06-24 14:49 Message: Logged In: NO Left two things out: This was seen and fixed in jython-2.1 I can be contacted at jer...@ge... ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=112867&aid=1227282&group_id=12867 |