ID: 13095
Updated by: sas
Reported By: [EMAIL PROTECTED]
Old Status: Open
Status: Closed
Bug Type: Session related
Operating System: Linux 2.4.4 (i686)
PHP Version: 4.0.6
New Comment:
This and several other bugs in this part of the code have been fixed. Please try a
snapshot (snaps.php.net) or wait for an upcoming release. Thanks for your detailed
report.
Previous Comments:
------------------------------------------------------------------------
[2001-09-02 13:54:42] [EMAIL PROTECTED]
Symtom: httpd eats 100% CPU and locks up all other httpds trying to access session
data (due to lock_mm)
Reproducable with a script that invokes hundreds (~600) of sessions (while true; do
lynx --source ...)
Hash collision problem?
/* should be a prime */
#define HASH_SIZE 577
./configure --with-apxs=/usr/sbin/apxs --with-openssl --enable-sigchild --with-bz2
--with-zlib --enable-dbase --with-dom --enable-ftp --with-gd --with-gettext --with-gmp
--with-java=/usr/local/jdk1.3 --with-mcrypt --with-mhash --with-mysql=/usr
--with-unixODBC --with-sablot --with-mm --enable-shmop --enable-sockets
--enable-sysvsem --enable-sysvshm --enable-wddx --enable-inline-optimization
#0 0x40446cce in ps_gc_mm () at mod_mm.c:205
#1 0x40444475 in php_session_start () at session.c:892
#2 0x4044596c in php_if_session_start () at session.c:1156
#3 0x407d4f84 in zend_reverse_table () from /usr/lib/apache/ZendOptimizer.so
#4 0x407dcb35 in zend_reverse_table () from /usr/lib/apache/ZendOptimizer.so
#5 0x407dcb35 in zend_reverse_table () from /usr/lib/apache/ZendOptimizer.so
#6 0x407e001d in zend_oe () from /usr/lib/apache/ZendOptimizer.so
#7 0x403de60e in zend_execute_scripts () at zend.c:259
#8 0x403f1634 in php_execute_script () at main.c:1138
#9 0x403ed750 in apache_php_module_main () at sapi_apache.c:98
#10 0x403ee1f1 in send_php (r=0x81614fc, display_source_mode=0, filename=0x0) at
mod_php4.c:536
#11 0x403ee233 in send_parsed_php (r=0x81614fc) at mod_php4.c:547
#12 0x8079529 in ap_invoke_handler ()
#13 0x808efbf in process_request_internal ()
#14 0x808f44a in ap_internal_redirect ()
#15 0x806443c in handle_dir ()
#16 0x8079529 in ap_invoke_handler ()
#17 0x808efbf in process_request_internal ()
#18 0x808f032 in ap_process_request ()
#19 0x8085b86 in child_main ()
#20 0x8085e2a in make_child ()
#21 0x8085ee6 in startup_children ()
#22 0x808656c in standalone_main ()
#23 0x8086dbc in main ()
#24 0x40126a8e in __libc_start_main () at ../sysdeps/generic/libc-start.c:93
Some common IP Adresses in loop
0x40446cba in ps_gc_mm () at mod_mm.c:205
0x40446cbf in ps_gc_mm () at mod_mm.c:205
0x40446cce in ps_gc_mm () at mod_mm.c:205
0x40446cd0 in ps_gc_mm () at mod_mm.c:205
for (h = 0; h < HASH_SIZE; h++)
for (sd = data->hash[h]; sd; sd = next) {
next = sd->next;
ps_mm_debug("looking at %s\n", sd->key);
if ((now - sd->ctime) > maxlifetime) {
ps_sd_destroy(data, sd);
*nrdels++;
}
}
What happens when the queue head/tail gets deleted with more than one entry? Seams to
produce a deadlock here!
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Edit this bug report at http://bugs.php.net/?id=13095&edit=1
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