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http://issues.apache.org/bugzilla/show_bug.cgi?id=42031 Summary: EventMPM child process freeze Product: Apache httpd-2 Version: 2.3-HEAD Platform: PC OS/Version: Linux Status: NEW Severity: critical Priority: P2 Component: Event MPM AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] Child process freezes with many downloading against MaxClients. How to reproduce: (1) configuration to httpd.conf StartServers 1 MaxClients 3 MinSpareThreads 1 MaxSpareThreads 3 ThreadsPerChild 3 MaxRequestsPerChild 0 Timeout 10 KeepAlive On MaxKeepAliveRequests 0 KeepAliveTimeout 5 (2) put a large file "test.mpg" (about 200MB) on DocumentRoot (3) apachectl start (4) execute many downloading simultaneously. e.g. bash and wget: $ for (( i=0 ; i<20 ; i++ )); do wget -b http://localhost/test.mpg; done; Then the child process often freezes. If not, try to download more. (5) terminate downloading e.g. bash and wget: $ killall wget (6) access to any file from web browser. However long you wait, server won't response. "apachectl graceful" then in error log [Tue Apr 03 16:41:14 2007] [debug] event.c(1392): the listener thread didn't exit "apachectl stop" then in error log [Tue Apr 03 16:48:18 2007] [warn] child process 31077 still did not exit, sending a SIGTERM [Tue Apr 03 16:48:20 2007] [warn] child process 31077 still did not exit, sending a SIGTERM [Tue Apr 03 16:48:22 2007] [warn] child process 31077 still did not exit, sending a SIGTERM [Tue Apr 03 16:48:24 2007] [error] child process 31077 still did not exit, sending a SIGKILL OS: Fedora Core 6 kernel: 2.6.20-1.2933.fc6 glibc: 2.5-10.fc6 httpd revision 525116. $ ./httpd -V Server version: Apache/2.3.0-dev (Unix) Server built: Apr 3 2007 15:49:09 Server's Module Magic Number: 20060905:2 Server loaded: APR 1.3.0-dev, APR-UTIL 1.3.0-dev Compiled using: APR 1.3.0-dev, APR-UTIL 1.3.0-dev Architecture: 32-bit Server MPM: Event threaded: yes (fixed thread count) forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/experimental/event" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="/usr/local/apache2" -D SUEXEC_BIN="/usr/local/apache2/bin/suexec" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="conf/mime.types" -D SERVER_CONFIG_FILE="conf/httpd.conf" backtrace of frozen child process: Thread 5 (Thread -1219343472 (LWP 30355)): #0 0x007b9402 in __kernel_vsyscall () No symbol table info available. #1 0x4bb3998e in __lll_mutex_lock_wait () from /lib/libpthread.so.0 No symbol table info available. #2 0x4bb357fc in _L_mutex_lock_85 () from /lib/libpthread.so.0 No symbol table info available. #3 0x4bb3533d in pthread_mutex_lock () from /lib/libpthread.so.0 No symbol table info available. #4 0x0055a308 in apr_thread_mutex_lock (mutex=0x83c72f8) at locks/unix/thread_mutex.c:92 rv = 0 #5 0x08091234 in process_socket (p=0x83f3cd0, sock=0x83f3d10, cs=0x83f3eb0, my_child_num=0, my_thread_num=0) at event.c:656 output_filter = (ap_filter_t *) 0x83f4448 rv = 0 c = (conn_rec *) 0x83f3f08 pt = (listener_poll_type *) 0x83f3ee8 conn_id = 0 rc = 2 sbh = (ap_sb_handle_t *) 0x83f45c8 #6 0x0809215c in worker_thread (thd=0x83b94e0, dummy=0x83e94e0) at event.c:1194 ti = (proc_info *) 0x83e94e0 process_slot = 0 thread_slot = 0 csd = (apr_socket_t *) 0x83f3d10 cs = (conn_state_t *) 0x83f3eb0 ptrans = (apr_pool_t *) 0x83f3cd0 rv = 0 is_idle = 0 #7 0x00566f70 in dummy_worker (opaque=0x83b94e0) at threadproc/unix/thread.c:142 thread = (apr_thread_t *) 0x83b94e0 #8 0x4bb333db in start_thread () from /lib/libpthread.so.0 No symbol table info available. #9 0x4ba1726e in clone () from /lib/libc.so.6 No symbol table info available. Thread 4 (Thread -1229833328 (LWP 30356)): #0 0x007b9402 in __kernel_vsyscall () No symbol table info available. #1 0x4bb3998e in __lll_mutex_lock_wait () from /lib/libpthread.so.0 No symbol table info available. #2 0x4bb357fc in _L_mutex_lock_85 () from /lib/libpthread.so.0 No symbol table info available. #3 0x4bb3533d in pthread_mutex_lock () from /lib/libpthread.so.0 No symbol table info available. #4 0x0055a308 in apr_thread_mutex_lock (mutex=0x83c72f8) at locks/unix/thread_mutex.c:92 rv = 0 #5 0x08091234 in process_socket (p=0x83e9c38, sock=0x83e9c78, cs=0x83e9e18, my_child_num=0, my_thread_num=1) at event.c:656 output_filter = (ap_filter_t *) 0x83ea3b0 rv = 0 c = (conn_rec *) 0x83e9e70 pt = (listener_poll_type *) 0x83e9e50 conn_id = 1 rc = 2 sbh = (ap_sb_handle_t *) 0x83ea818 #6 0x0809215c in worker_thread (thd=0x83b9500, dummy=0x83e94f0) at event.c:1194 ti = (proc_info *) 0x83e94f0 process_slot = 0 thread_slot = 1 csd = (apr_socket_t *) 0x83e9c78 cs = (conn_state_t *) 0x83e9e18 ptrans = (apr_pool_t *) 0x83e9c38 rv = 0 is_idle = 0 #7 0x00566f70 in dummy_worker (opaque=0x83b9500) at threadproc/unix/thread.c:142 thread = (apr_thread_t *) 0x83b9500 #8 0x4bb333db in start_thread () from /lib/libpthread.so.0 No symbol table info available. #9 0x4ba1726e in clone () from /lib/libc.so.6 No symbol table info available. #8 0x4bb333db in start_thread () from /lib/libpthread.so.0 No symbol table info available. #9 0x4ba1726e in clone () from /lib/libc.so.6 No symbol table info available. Thread 3 (Thread -1240323184 (LWP 30357)): #0 0x007b9402 in __kernel_vsyscall () No symbol table info available. #1 0x4bb3998e in __lll_mutex_lock_wait () from /lib/libpthread.so.0 No symbol table info available. #2 0x4bb357fc in _L_mutex_lock_85 () from /lib/libpthread.so.0 No symbol table info available. #3 0x4bb3533d in pthread_mutex_lock () from /lib/libpthread.so.0 No symbol table info available. #4 0x0055a308 in apr_thread_mutex_lock (mutex=0x83c72f8) at locks/unix/thread_mutex.c:92 rv = 0 #5 0x08091382 in process_socket (p=0x8419eb8, sock=0x8419ef0, cs=0x841a090, my_child_num=0, my_thread_num=2) at event.c:697 rc = 0 pt = (listener_poll_type *) 0x841a0c8 c = (conn_rec *) 0x841a0e8 pt = (listener_poll_type *) 0x841a0c8 conn_id = 2 rc = -2 sbh = (ap_sb_handle_t *) 0x841a088 #6 0x0809215c in worker_thread (thd=0x83b9520, dummy=0x83e94e0) at event.c:1194 ti = (proc_info *) 0x83e94e0 process_slot = 0 thread_slot = 2 csd = (apr_socket_t *) 0x8419ef0 cs = (conn_state_t *) 0x0 ptrans = (apr_pool_t *) 0x8419eb8 rv = 0 is_idle = 0 #7 0x00566f70 in dummy_worker (opaque=0x83b9520) at threadproc/unix/thread.c:142 thread = (apr_thread_t *) 0x83b9520 #8 0x4bb333db in start_thread () from /lib/libpthread.so.0 No symbol table info available. #9 0x4ba1726e in clone () from /lib/libc.so.6 No symbol table info available. Thread 2 (Thread -1250813040 (LWP 30358)): #0 0x007b9402 in __kernel_vsyscall () No symbol table info available. #1 0x4bb371a6 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0 No symbol table info available. #2 0x0055876f in apr_thread_cond_wait (cond=0x83b9478, mutex=0x83b9448) at locks/unix/thread_cond.c:68 rv = 0 #3 0x08094de4 in ap_queue_info_wait_for_idler (queue_info=0x83b9430) at fdqueue.c:158 rv = 0 prev_idlers = 0 #4 0x080917bd in get_worker (have_idle_worker_p=0xb5721364) at event.c:855 rc = 1270095860 #5 0x08091dd1 in listener_thread (thd=0x83b9540, dummy=0x83e9500) at event.c:1063 rc = 0 ti = (proc_info *) 0x83e9500 process_slot = 0 tpool = (apr_pool_t *) 0x83c72c0 csd = (void *) 0x8419ef0 ptrans = (apr_pool_t *) 0x8419eb8 lr = (ap_listen_rec *) 0x832b520 have_idle_worker = 0 cs = (conn_state_t *) 0x83fff50 out_pfd = (const apr_pollfd_t *) 0x83c73ac num = 0 time_now = 1175583389600457 timeout_interval = 1000000 timeout_time = 1175583389700457 pt = (listener_poll_type *) 0x83c73f0 #6 0x00566f70 in dummy_worker (opaque=0x83b9540) at threadproc/unix/thread.c:142 thread = (apr_thread_t *) 0x83b9540 #7 0x4bb333db in start_thread () from /lib/libpthread.so.0 No symbol table info available. #8 0x4ba1726e in clone () from /lib/libc.so.6 No symbol table info available. Thread 1 (Thread -1208617280 (LWP 30353)): #0 0x007b9402 in __kernel_vsyscall () No symbol table info available. #1 0x4bb39d6b in read () from /lib/libpthread.so.0 No symbol table info available. #2 0x08095389 in ap_mpm_pod_check (pod=0x8341640) at pod.c:54 c = 0 '\0' fd = 5 rc = -1075834592 #3 0x08092bb6 in child_main (child_num_arg=0) at event.c:1553 threads = (apr_thread_t **) 0x83e94d0 rv = 0 ts = (thread_starter *) 0x83b9300 thread_attr = (apr_threadattr_t *) 0x83b9310 start_thread_id = (apr_thread_t *) 0x83b9348 #4 0x08092d3c in make_child (s=0x832ef78, slot=0) at event.c:1639 pid = 0 #5 0x08092dbf in startup_children (number_to_start=1) at event.c:1658 i = 0 #6 0x080934e4 in ap_mpm_run (_pconf=0x832d0a8, plog=0x835d168, s=0x832ef78) at event.c:1978 remaining_children_to_start = 1 #7 0x08064abb in main (argc=3, argv=0xbfe011a4) at main.c:750 c = 0 '\0' configtestonly = 0 confname = 0x80a0d7d "conf/httpd.conf" def_server_root = 0x80a0d8d "/usr/local/apache2" temp_error_log = 0x0 error = 0x0 process = (process_rec *) 0x832b128 server_conf = (server_rec *) 0x832ef78 pglobal = (apr_pool_t *) 0x832b0a0 pconf = (apr_pool_t *) 0x832d0a8 plog = (apr_pool_t *) 0x835d168 ptemp = (apr_pool_t *) 0x8361178 pcommands = (apr_pool_t *) 0x832f0b0 opt = (apr_getopt_t *) 0x832f148 rv = 0 mod = (module **) 0x80acc90 optarg = 0x0 signal_server = ( apr_OFN_ap_signal_server_t *) 0x80859a8 <ap_signal_server> #0 0x007b9402 in __kernel_vsyscall () -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
