On Apr 13, 2005, at 3:51 PM, Skylos wrote:
Greetings, I'm pretty new to the concept of threads and debugging them - I currently am running... Server version: Apache/2.0.53 Server built: Mar 6 2005 21:52:49 I am utilizing the worker mpm to serve a moderate volume website with two servers. I extensively use mod_perl, but I realize this is not a mod_perl list. I purely wish to learn ways of finding out what stage/process is going on when this thread/process locks up. This should be general to apache, right? My symptoms are that a server will start utilizing 100% of one of the 4 cpus. (this happens on both) This usually happens within 18 hours of a server startup, but seems entirel.y random. If I do an 'apachectl restart', the problem will almost always go away. However, even on shutdown, there will be a several httpd processes left that will not die without a kill -9 to them specifically. When I display top, it shows the cpu usage, but it doesn't show which process is using it - sorting by cpu usage shows no process using more than about 0.3% of the cpu. I need help. Can you suggest commands that would allow me to track the threads, see what might be happening in the request stream when this occurs? Hopefully, Skylos
I don't have an answer for you, but am experiencing the same problem with 2.0.53 compiled and running on OS X server. It was also happening with 2.0.52. Mine was also built with MPM=worker
I have attached gdb to the runaway process, and get this backtrace (every time the same)
#0 0x9000eac4 in read () #1 0x00011030 in ap_mpm_pod_check () #2 0x0000ecc8 in child_main () #3 0x0000eee8 in make_child () #4 0x0000f52c in perform_idle_server_maintenance () #5 0x0000f838 in server_main_loop () #6 0x0000fc90 in ap_mpm_run () #7 0x00012df0 in main () #8 0x000029f8 in _start () #9 0x0000286c in start () but, I'm at a loss of what to investigate next. Tony --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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