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From bugzi...@apache.org
Subject [Bug 50335] Cores dumped under high load (segmentation fault signal 11 SIGSEGV)
Date Fri, 09 Nov 2012 11:31:18 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=50335

--- Comment #15 from Jeff Trawick <trawick@apache.org> ---
Here's the crasher in the last backtrace posted.  (I filtered out any threads
that were blocked in syscalls.)

Thread 39 (process 2641292    ):
#0  PyObject_Malloc (nbytes=47) at Objects/obmalloc.c:758
        bp = (block *) 0xffffffff <Address 0xffffffff out of bounds>
        pool = (poolp) 0xa72000
        next = (poolp) 0xff3aa270
        size = 5
#1  0xfe6d5f98 in PyString_FromString (str=0xad86d0 "onlinelibrary.wiley.com")
    at Objects/stringobject.c:138
        op = (PyStringObject *) 0x2f
#2  0xfe6c6f14 in PyDict_GetItemString (v=0xad86d0, 
    key=0xad86d0 "onlinelibrary.wiley.com") at Objects/dictobject.c:2284
        kv = (PyObject *) 0xad86d0
        rv = (PyObject *) 0x26b8a0
#3  0xfe68f0fc in get_interpreter (name=0xad86d0 "onlinelibrary.wiley.com")
    at mod_python.c:255
        tstate = (PyThreadState *) 0xd22730
        idata = (interpreterdata *) 0x0
#4  0xfe68f620 in python_cleanup (data=0x7d7798) at mod_python.c:353
No locals.
#5  0xff125fb0 in run_cleanups (cref=0xafd488) at memory/unix/apr_pools.c:2346
        c = (cleanup_t *) 0x613790
#6  0xff1270a0 in apr_pool_destroy (pool=0xafd478)
    at memory/unix/apr_pools.c:809
        active = (apr_memnode_t *) 0x0
        allocator = (apr_allocator_t *) 0xafd478
...

Although this is also on a pool cleanup, it may be completely unrelated.  See
if any subsequent crashes have different backtraces (suggestive of there still
being a more general issue with pool use) or if they now are consistently in
this code (suggestive of this particular code needing to be reviewed
carefully).

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