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From bugzi...@apache.org
Subject [Bug 50335] Cores dumped under high load (segmentation fault signal 11 SIGSEGV)
Date Sun, 11 Nov 2012 23:36:00 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=50335

--- Comment #21 from Jeff Trawick <trawick@apache.org> ---
(In reply to comment #19)
> Created attachment 29585 [details]
> gdb output from core 2012-11-11
> 
> We had another core so here is the output from running the same gdb command
> as before.
> 
> I'm afraid I don't have the requisite knowledge to identify the relevant
> thread(s)

The only thread I see that could have crashed is

Thread 1 (process 2370996    ):
#0  PyObject_Malloc (nbytes=41) at Objects/obmalloc.c:758
        bp = (block *) 0x144679f ""
        pool = (poolp) 0x1446000
        next = (poolp) 0xfc4aac10
        size = 5
#1  0xfe73626c in PyString_FromStringAndSize (str=0x143ed79
"olbannerright.gif", size=17) at Objects/stringobject.c:83
        op = (PyStringObject *) 0x29
#2  0xfe6f8464 in PySequence_GetSlice (s=0x143ed40, i1=37, i2=54)
    at Objects/abstract.c:1979
        m = (PySequenceMethods *) 0xfe85ef9c
        mp = (PyMappingMethods *) 0xfe85ef9c
#3  0xfe7bfc74 in match_group (self=0x1437cc8, args=0x14439d0)
    at Modules/_sre.c:3228
        result = (PyObject *) 0x800000
        i = 3
        size = -24778856
#4  0xfe727934 in PyCFunction_Call (func=0xd467d8, arg=0x14439d0, kw=0x0)
    at Objects/methodobject.c:116
        meth = (PyCFunction) 0xfe7bfa2c <match_group>
        self = (PyObject *) 0x1437cc8
        size = 1
#5  0xfe7733d0 in PyEval_EvalFrameEx (f=0x108a090, throwflag=5889119)
    at Python/ceval.c:3706
...

As with your previous crash, this crash is in PyObject_Malloc.  Unlike the
previous one, it is not in a pool cleanup.

Any idea if this infrequent crash could have been going on "forever"?  Is the
crash frequently still much lower than before you applied the patch to this
bug?

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