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Manfred Rohrmueller
mrohrmueller at ra.rockwell.com
Wed Jul 13 05:16:34 EDT 2005
We have a crash similar to http://www.modpython.org/pipermail/mod_python/2004-February/015004.html, but we still get the crash even with a very small configuration file... The crash can be reproduced faster, if the number of threads (ThreadsPerChild) is higher, the Apache process priority is set to 'Realtime' or 'High' and the number of clients is high. This crash looks similar to the one described in Can anyone help with this stack trace? Thanks in advance Manfred ------------------------------------------------------------------- OS Windows XP SP2+ Hyperthreading ON; Windows 2003 SP1 2xXEON + Hyperthreading ON Server: Apache/2.0.54 (Win32) mod_python/3.1.4 Python/2.3.5 Server: Apache/2.0.52 (Win32) mod_python/3.1.4 Python/2.3.5 Server: Apache/2.0.54 (Win32) mod_python/3.1.3 Python/2.3.5 Server: Apache/2.0.52 (Win32) mod_python/3.1.3 Python/2.3.5 Command line: apache.exe -DDEBUG -DONE_PROCESS -C "DocumentRoot ..." -C "Listen 8080" -C "PidFile ..." -C "ServerAdmin ..." -C "ServerRoot ..." -C "ServerName ..." -d ... -f ... -C "PythonPath '[...]'" ------------------------------------------------------------------- 20 worker threads Apache Threads: 388 main child_main Normal 0 2212 worker_main apr_stat Normal 0 440 worker_main apr_file_open Normal 0 1744 worker_main apr_stat Normal 0 1556 worker_main apr_winapi_GetFileAttributesExW Normal 0 2116 worker_main EnterNonRecursiveMutex Normal 0 172 worker_main apr_stat Normal 0 2964 worker_main EnterNonRecursiveMutex Normal 0 3876 worker_main EnterNonRecursiveMutex Normal 0 1516 worker_main EnterNonRecursiveMutex Normal 0 4044 worker_main EnterNonRecursiveMutex Normal 0 1552 worker_main EnterNonRecursiveMutex Normal 0 3604 worker_main EnterNonRecursiveMutex Normal 0 1728 worker_main EnterNonRecursiveMutex Normal 0 2848 worker_main apr_file_flush Normal 0 3784 worker_main EnterNonRecursiveMutex Normal 0 3860 worker_main EnterNonRecursiveMutex Normal 0 3816 worker_main EnterNonRecursiveMutex Normal 0 2036 worker_main EnterNonRecursiveMutex Normal 0 1780 worker_main EnterNonRecursiveMutex Normal 0 > 3468 worker_main __ascii_stricmp Normal 0 1292 winnt_accept winnt_accept Normal 0 ------------------------------------------------------------------- Stack: > msvcr71.dll!__ascii_stricmp(void * dst=0x68747950, void * src=0x4c27725b) Line 79 Asm msvcr71.dll!_stricmp(const char * dst=0x68747950, const char * src=0x4c27725b) Line 57 + 0xb C libapr.dll!table_mergesort(apr_pool_t * pool=0x68747950, apr_table_entry_t * * values=0x00000001, int n=0x00000003) Line 975 + 0x11 C libapr.dll!apr_table_compress(apr_table_t * t=0x008e7148, unsigned int flags=0x00000000) Line 1092 C libapr.dll!apr_table_overlap(apr_table_t * a=0x008e7148, const apr_table_t * b=0x008b12b8, unsigned int flags=0x00000000) Line 1206 + 0xe C mod_python.so!python_merge_config(apr_pool_t * p=0x008e61b8, void * current_conf=0x0087f3c8, void * new_conf=0x008b1150) Line 618 C libhttpd.dll!ap_merge_per_dir_configs(apr_pool_t * p=0x008e61b8, ap_conf_vector_t * base=0x008734b8, ap_conf_vector_t * new_conf=0x008b0e38) Line 241 + 0x5 C libhttpd.dll!ap_location_walk(request_rec * r=0x008e61f0) Line 1290 + 0x11 C libhttpd.dll!ap_process_request_internal(request_rec * r=0x00000000) Line 136 + 0x6 C libhttpd.dll!ap_process_request(request_rec * r=0x008e61f0) Line 248 C libhttpd.dll!ap_process_http_connection(conn_rec * c=0x008e22b0) Line 251 + 0x6 C libhttpd.dll!ap_run_process_connection(conn_rec * c=0x008e22b0) Line 43 + 0x25 C libhttpd.dll!ap_process_connection(conn_rec * c=0x008e22b0, void * csd=0x008e21e0) Line 176 + 0x6 C libhttpd.dll!worker_main(void * thread_num_val=0x008e22a8) Line 733 C msvcr71.dll!_threadstartex(void * ptd=0x003039d8) Line 241 + 0x6 C kernel32.dll!GetModuleFileNameA() + 0x1b4 ------------------------------------------------------------------- Test script (crash_apache.py): # begin: crash_apache.py #! sessions have to coresponde to the (ThreadsPerChild/number of clients) sessions=10 import urllib, threading class getu(threading.Thread): def __init__(self, nom): self.nom = nom threading.Thread.__init__(self) def run(self): for i in range(10000): rr = urllib.urlopen("http://localhost:8080/test/thread_%s_%s.pd" % (self.nom, i)) rr.readlines() rr.close() threads = [getu(i) for i in range(sessions)] def c (): [t.start() for t in threads] [t.join() for t in threads] """ import crash_apache crash_apache.c() """ # end: crash_apache.py ------------------------------------------------------------------- Test handler (mptest.py): from mod_python import apache requestCount = 0 rsp = "<html><body>#[%s]</body></html>" def handler(apacheRequest): global requestCount apache.log_error( "Request #%d" % requestCount ) requestCount += 1 apacheRequest.write( rsp% requestCount) apacheRequest.flush() return apache.OK ------------------------------------------------------------------- Stripped HTTP config: (comments removed) Timeout 300 KeepAlive On MaxKeepAliveRequests 0 KeepAliveTimeout 90 <IfModule mpm_winnt.c> ThreadsPerChild 20 MaxRequestsPerChild 0 </IfModule> LoadModule alias_module modules/mod_alias.so LoadModule log_config_module modules/mod_log_config.so LoadModule python_module modules/mod_python.so <Directory "/"> </Directory> DefaultType text/plain HostnameLookups Off LogLevel error PythonImport mptest main_interpreter <LocationMatch "/test/.*\.pd"> SetHandler python-program PythonHandler mptest::handler PythonEnablePdb Off PythonDebug On PythonAutoReload Off PythonInterpPerDirectory Off PythonInterpreter main_interpreter </LocationMatch> -------------- next part -------------- An HTML attachment was scrubbed... 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