Symptoms: 1. At debug-level logging, the error log shows:[Wed Jun 23 14:38:21 2010] [debug] worker.c(1083): the listener thread didn't exit
I understand this is not a major issue (https://issues.apache.org/bugzilla/show_bug.cgi?id=9011), but provides insight into execution.
2. pstack of the hanging child shows the main thread is hanging while shutting down worker threads:
----------------- lwp# 1 / thread# 1 -------------------- fffffd7fff06cdea lwp_wait (3, fffffd7fffdff964) fffffd7fff063eee _thrp_join () + 3e fffffd7fff0640cc pthread_join () + 1c fffffd7fff27b195 apr_thread_join () + 25 0000000000470a19 join_workers () + e9 0000000000470de3 child_main () + 353 0000000000471137 make_child () + 147 0000000000471a6e ap_mpm_run () + 8be 000000000042fd81 main () + 8b1 000000000042f08c _start () + 6c ----------------- lwp# 3 / thread# 3 -------------------- fffffd7fff067527 lwp_park (0, 0, 0) fffffd7fff0610b9 cond_wait_queue () + 59 fffffd7fff061647 _cond_wait () + 57 fffffd7fff061676 cond_wait () + 26 fffffd7fff0616b9 pthread_cond_wait () + 9 0000000000472cc2 ap_queue_pop () + 72 000000000047032d worker_thread () + 11d fffffd7fff06727b _thr_setup () + 5b fffffd7fff0674b0 _lwp_start () ----------------- lwp# 4 / thread# 4 -------------------- fffffd7fff067527 lwp_park (0, 0, 0) fffffd7fff0610b9 cond_wait_queue () + 59 fffffd7fff061647 _cond_wait () + 57 fffffd7fff061676 cond_wait () + 26 fffffd7fff0616b9 pthread_cond_wait () + 9 0000000000472cc2 ap_queue_pop () + 72 000000000047032d worker_thread () + 11d fffffd7fff06727b _thr_setup () + 5b fffffd7fff0674b0 _lwp_start () ---SNIP--- ...lots more threads in lwp_park(0, 0, 0)... ---SNIP--- ----------------- lwp# 28 / thread# 28 -------------------- fffffd7fff06ce2a lwp_mutex_timedlock (fffffd7ffeee0000, 0) fffffd7fff05fb78 mutex_lock_internal () + 328 fffffd7fff05ff62 mutex_lock_impl () + 112 fffffd7fff06002b mutex_lock () + b fffffd7fff26e5a5 proc_mutex_proc_pthread_acquire () + 15 000000000046ff4c listener_thread () + 3bc fffffd7fff06727b _thr_setup () + 5b fffffd7fff0674b0 _lwp_start ()It appears that join_workers() is hanging on a call to apr_thread_join(...), in line 1104 of worker.c.
HTTPD was compiled with Solaris's default GCC (3.4.3), with the following flags:
CFLAGS="-O3 -m64 -march=athlon64"
LDFLAGS="-R$INSTALL_SSL/lib -L$INSTALL_SSL/lib"
./configure -C \
--prefix=$INSTALL \
--enable-mods-shared="deflate expires headers proxy
proxy-ajp proxy-balancer proxy-connect proxy-http rewrite ssl usertrack
dav status log-config logio" \
-with-ssl=$INSTALL_SSL \
--with-mpm=worker \
--enable-nonportable-atomics
Any thoughts? Anything other information I can provide to diagnose this
issue?
Many thanks, Scott Severtson --------------------------------------------------------------------- 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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