On 24 October 2010 14:15, Graham Dumpleton <[email protected]> wrote: > On 22 October 2010 07:10, Patrick Michael Kane <[email protected]> wrote: >> Hey Graham: >> >> Just had another freeze, this time with flock -- backtraces from two >> of the WSGI processes below. >> >> The Apaches are in the same state as with the SysV mutex, blocking on >> this connect: >> >> connect(69, {sa_family=AF_FILE, path="/home/actionkit/releases/ >> stable/apache/logs/.2028.61.7.sock"}, 110 >> >> Let me know if you need more info! > > If possible, next time can you capture it across all process in the > daemon process group. > > Want to validate that whether they are all stuck on flock() or sysvsem > lock in Thread 2. > > This will tell me whether issue is that no process is getting past > lock, or whether one is getting to do apr_poll() on listener socket, > but not seeing a notification.
You may not want to do this, but maybe after in some development testing, if you could actually use mod_wsgi subversion trunk code at: https://modwsgi.googlecode.com/svn/trunk/mod_wsgi I have no reason to believe code isn't stable. Importantly, has changes to logging which will produce additional information which may help me. If you run the code, use configuration: LogLevel info WSGIVerboseDebugging On Ie., 'info' level for standard Apache logging in global server scope and in VirtualHost scope, plus enable verbose debugging in mod_wsgi. The latter will result in some per thread creation/exit logging which would normally be logged at debug level to be logged at info level. In addition to logging changes, does also have a change related to cross process mutex type, but right now because you use flock, that doesn't seem to be a contributor. Much thanks if you are able to do this. Graham > Thanks. > > Graham > >> Thread 4 (Thread 0x41d73940 (LWP 32370)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa1735bf in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 3 (Thread 0x42774940 (LWP 32371)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa173808 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 2 (Thread 0x43175940 (LWP 32372)): >> #0 0x000000330acc5c57 in flock () from /lib64/libc.so.6 >> #1 0x00002acda11546b5 in ?? () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa17ab5e in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 1 (Thread 0x2acda1e08a90 (LWP 32369)): >> #0 0x000000330acca556 in poll () from /lib64/libc.so.6 >> #1 0x00002acda115b0d1 in apr_poll () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa178377 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x00002acdaa178ce7 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #4 0x00002acdaa17b0e1 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #5 0x00002acda1156a3d in apr_proc_other_child_alert () >> from /usr/lib64/libapr-1.so.0 >> #6 0x0000000000446404 in ap_mpm_run () >> #7 0x0000000000421b11 in main () >> (gdb) thread apply all bt >> >> Thread 4 (Thread 0x41d73940 (LWP 32370)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa1735bf in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 3 (Thread 0x42774940 (LWP 32371)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa173808 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 2 (Thread 0x43175940 (LWP 32372)): >> #0 0x000000330acc5c57 in flock () from /lib64/libc.so.6 >> #1 0x00002acda11546b5 in ?? () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa17ab5e in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 1 (Thread 0x2acda1e08a90 (LWP 32369)): >> #0 0x000000330acca556 in poll () from /lib64/libc.so.6 >> #1 0x00002acda115b0d1 in apr_poll () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa178377 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x00002acdaa178ce7 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #4 0x00002acdaa17b0e1 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #5 0x00002acda1156a3d in apr_proc_other_child_alert () >> from /usr/lib64/libapr-1.so.0 >> #6 0x0000000000446404 in ap_mpm_run () >> #7 0x0000000000421b11 in main () >> >> >> -------------- >> >> >> Thread 4 (Thread 0x41c2f940 (LWP 12879)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa1735bf in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 3 (Thread 0x42630940 (LWP 12880)): >> #0 0x000000330accc5e2 in select () from /lib64/libc.so.6 >> #1 0x00002acda115f2f5 in apr_sleep () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa173808 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 2 (Thread 0x43031940 (LWP 12881)): >> #0 0x000000330acc5c57 in flock () from /lib64/libc.so.6 >> #1 0x00002acda11546b5 in ?? () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa17ab5e in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x000000330b406367 in start_thread () from /lib64/libpthread.so.0 >> #4 0x000000330acd309d in clone () from /lib64/libc.so.6 >> >> Thread 1 (Thread 0x2acda1e08a90 (LWP 12878)): >> #0 0x000000330acca556 in poll () from /lib64/libc.so.6 >> #1 0x00002acda115b0d1 in apr_poll () from /usr/lib64/libapr-1.so.0 >> #2 0x00002acdaa178377 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #3 0x00002acdaa178ce7 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #4 0x00002acdaa17b0e1 in ?? () >> from /home/actionkit/releases/stable/apache/conf/libexec/ >> mod_wsgi.so >> #5 0x00002acda1156a3d in apr_proc_other_child_alert () >> from /usr/lib64/libapr-1.so.0 >> #6 0x0000000000446404 in ap_mpm_run () >> #7 0x0000000000421b11 in main () >> >> -- >> You received this message because you are subscribed to the Google Groups >> "modwsgi" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/modwsgi?hl=en. >> >> > -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/modwsgi?hl=en.
