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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 41748] - Segmentation violation in httpd - thread/worker
Date Fri, 16 Mar 2007 14:44:56 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=41748





------- Additional Comments From thulek@cz.ibm.com  2007-03-16 07:44 -------
While debuging we discovered the terminations (SIGSEGV) seemed to be related to
various symptoms of heap corruption (eg. SIGSEGV in malloc(), or invalid pointer
passed to free()).

Two different approaches seemed to fix the problem:

1) Using the original build, created on AIX 5.1
Our original httpd build was made on AIX 5.1 and run under AIX 5.3. The default
envvars configuration contains: "MALLOCMULTIHEAP=considersize,heaps:8; export
MALLOCMULTIHEAP;"
After unsetting the environment variable MALLOCMULTIHEAP no abnormal httpd
terminations occurred. 

2) New build of httpd on AIX 5.3
We made a another Apache build on AIX 5.3. Running this compilation with default
envvars configuration was without problems too, ie. multiheap

We are still puzzled as to why the behaviour of malloc (with respect to the
multiheap feature) depended on which version of AIX was used for compilation...


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