|Summary:||Crash mod_mem_cache and mod_svn|
|Product:||Apache httpd-2||Reporter:||Chuck Short <zulcss>|
|Component:||Core||Assignee:||Apache HTTPD Bugs Mailing List <bugs>|
Description Chuck Short 2010-04-26 13:51:45 UTC
Hi, This was originally reported in http://bugs.launchpad.net/bugs/568468. I have attached the information that the user has provided below. If you have any questions please let me know. =================== Binary package hint: apache2 On a lucid server we see apache segmentation faulting at a high rate. This causes svn checkouts to fail depending on the client (e.g. on Ubunut 9.10 subversion with neon as dav lib is okay, serf is not). I was able to reproduce it with a minimal setup: Using lucid from today, i.e. with with mods-enabled: alias auth_basic authz_default authz_host cache dav dav_svn deflate info mem_cache mime dav_svn.conf: <Location /svn> DAV svn SVNParentPath /var/lib/svn SVNListParentPath on SVNPathAuthz off </Location> mem_cache.conf is untouched. I created an svn repo /var/lib/svn/svn_memcache (see attachment). With some clients I cannot check it out, it fails for bad.root segfaulting apache. wget http://localhost/svn/svn_memcache/bad.root never succeeds. If I disable mem_cache it works. (Yes, I know that we shouldn't have it enabled for serving svn to begin with and I am thankful for mem_cache pointing this out but that's not the point here :-) Cheers, Axel. ================ Sure, here it is. #0 0x00007ffff5cc613e in ?? () from /usr/lib/apache2/modules/mod_cache.so #1 0x00007ffff589c1ed in ?? () from /usr/lib/apache2/modules/mod_dav_svn.so #2 0x00007ffff5ab694a in ?? () from /usr/lib/apache2/modules/mod_dav.so #3 0x00007ffff7fd6140 in ap_run_handler (r=0x7ffff834eeb8) at /build/buildd/apache2-2.2.14/server/config.c:159 #4 0x00007ffff7fd9aa8 in ap_invoke_handler (r=0x7ffff834eeb8) at /build/buildd/apache2-2.2.14/server/config.c:373 #5 0x00007ffff7fe7678 in ap_process_request (r=0x7ffff834eeb8) at /build/buildd/apache2-2.2.14/modules/http/http_request.c:282 #6 0x00007ffff7fe4528 in ap_process_http_connection (c=0x7ffff834af28) at /build/buildd/apache2-2.2.14/modules/http/http_core.c:190 #7 0x00007ffff7fddcf8 in ap_run_process_connection (c=0x7ffff834af28) at /build/buildd/apache2-2.2.14/server/connection.c:43 #8 0x00007ffff7fec037 in child_main (child_num_arg=<value optimized out>) at /build/buildd/apache2-2.2.14/server/mpm/prefork/prefork.c:662 #9 0x00007ffff7fec306 in make_child (s=0x7ffff8214938, slot=0) at /build/buildd/apache2-2.2.14/server/mpm/prefork/prefork.c:702 #10 0x00007ffff7fec953 in ap_mpm_run (_pconf=<value optimized out>, plog=<value optimized out>, s=<value optimized out>) at /build/buildd/apache2-2.2.14/server/mpm/prefork/prefork.c:978 #11 0x00007ffff7fc2350 in main (argc=2, argv=0x7fffffffe758) at /build/buildd/apache2-2.2.14/server/main.c:742 Looks like the modules don't have debug info - that's really unfortunate... Let me know if I can help with providing them somehow (i.e. whether I should build the modules from source).