We have a bunch of apache servers here with php compiled in.
They keep dying. I think they're all tending to die at the same time.
The servers on ports 8080 and 443 are fine; it's only the port 80 apaches
that are dying.
I did a backtrace with gdb, and I get thousands of these:
#60961 0xef7d46e8 in ?? ()
#60962 0xef7dfcc8 in ?? ()
#60963 0xef7d2d8c in ?? ()
#60964 0xef24c980 in _PROCEDURE_LINKAGE_TABLE_ () from /usr/lib/libthread.so.1
#60965 0xef239308 in kill () from /usr/lib/libthread.so.1
#60966 0x1516dc in sig_coredump ()
#60967 0xef23b928 in __sighndlr () from /usr/lib/libthread.so.1
#60968 <signal handler called>
#60969 dbexit () at dblib.c:561
#60970 0xbb7a8 in zm_shutdown_sybase (type=-282964972,
module_number=-277216068) at php_sybase_db.c:254
It seems to me that either there's a weird recursive bug apache with php,
or someone has found a DOS attack against apache with php by pelting it
with a bad signal.
Any suggestions? Restarting our apaches is quickly getting old. It's
been so easy to take apaches reliability for granted.
TIA.
BTW, thanks for the work you guys do on apache/php.
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