Hi,
With mod_wsgi 3.4, apache httpd 2.4.2, apr 1.4.6, apr_util 1.4.1.
Embedded Mode seems to work well. But I need Daemon Mode.
When I add the WSGIProcessGroup directive to the config file and restart
Apache httpd, it blows out immediately with a segmentation fault with no
mention in the log.
It happens in mod_wsgi.c, on line 10069, this:
entry->server = cmd->server;
Debugging:
--------
gdb /usr/sbin/httpd
b wsgi_add_daemon_process
run -X -f /etc/opt/tms/output/httpd.conf
--------
The first call to wsgi_add_daemon_process goes without incident. It's the
second call that's a problem.
--------
Breakpoint 1, wsgi_add_daemon_process (cmd=0x7fffffffdb30,
mconfig=0x8cd0b0, args=0x8d08b8 "djangodaemon threads=15") at
mod_wsgi.c:9720
9720 mod_wsgi.c: No such file or directory.
in mod_wsgi.c
--------
Go to the line, examine the locals:
--------
(gdb) until 10069
wsgi_add_daemon_process (cmd=0x7fffffffdb30, mconfig=0x8cd0b0,
args=0x8d08cf "") at mod_wsgi.c:10069
10069 in mod_wsgi.c
(gdb) p *wsgi_daemon_list
$1 = {pool = 0x80d138, elt_size = 280, nelts = 1, nalloc = 20, elts =
0x944058 ""}
(gdb) p *cmd->server
$2 = {process = 0x80b218, next = 0x0, error_fname = 0x5890ce
"logs/error_log", error_log = 0x8809f8, log = {module_levels = 0x0, level =
4}, module_config = 0x8c77c8,
lookup_defaults = 0x8cbd78, defn_name = 0x0, defn_line_number = 0,
is_virtual = 0 '\000', port = 0, server_scheme = 0x0, server_admin =
0x5890bb "[no address given]",
server_hostname = 0x0, addrs = 0x880a70, timeout = 60000000,
keep_alive_timeout = 5000000, keep_alive_max = 100, keep_alive = 1, names =
0x0, wild_names = 0x0,
path = 0x0, pathlen = 0, limit_req_line = 8190, limit_req_fieldsize =
8190, limit_req_fields = 100, context = 0x0}
(gdb) p entry
$3 = (WSGIProcessGroup *) 0x944058
--------
Okay. Continue, for the next call.
--------
(gdb) c
Continuing.
Missing separate debuginfo for /lib64/libnss_files.so.2
Try: yum --disablerepo='*' --enablerepo='*-debuginfo' install
/var/lib/debug/.build-id/19/c24fb834453511d12dfb4283d3c70f1346e974.debug
Breakpoint 1, wsgi_add_daemon_process (cmd=0x7fffffffdb30,
mconfig=0x852730, args=0x8d14a0 "djangodaemon threads=15") at
mod_wsgi.c:9720
9720 in mod_wsgi.c
--------
Go to the line, examine the locals.
--------
(gdb) until 10069
wsgi_add_daemon_process (cmd=0x7fffffffdb30, mconfig=0x852730,
args=0x8d14b7 "") at mod_wsgi.c:10069
10069 in mod_wsgi.c
(gdb) p *wsgi_daemon_list
$4 = {pool = 0x5929f0, elt_size = 10, nelts = 1, nalloc = 4567695, elts =
0x592b78 "mod_file_cache.c"}
(gdb) p *cmd->server
$5 = {process = 0x80b218, next = 0x0, error_fname = 0x5890ce
"logs/error_log", error_log = 0x845cb8, log = {module_levels = 0x0, level =
4}, module_config = 0x845ee0,
lookup_defaults = 0x8513f8, defn_name = 0x0, defn_line_number = 0,
is_virtual = 0 '\000', port = 0, server_scheme = 0x0, server_admin =
0x5890bb "[no address given]",
server_hostname = 0x0, addrs = 0x845d30, timeout = 60000000,
keep_alive_timeout = 5000000, keep_alive_max = 100, keep_alive = 1, names =
0x0, wild_names = 0x0,
path = 0x0, pathlen = 0, limit_req_line = 8190, limit_req_fieldsize =
8190, limit_req_fields = 100, context = 0x0}
(gdb) p entry
$6 = (WSGIProcessGroup *) 0x592b78
--------
Continue, and blammo...
--------
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x00000000004fcdd6 in wsgi_add_daemon_process (cmd=0x7fffffffdb30,
mconfig=0x852730, args=0x8d14b7 "") at mod_wsgi.c:10069
10069 in mod_wsgi.c
(gdb)
--------
So it's not the usual kind of null pointer segv situation. The assignment
on line 10069 looks to me like it should work.
I did notice that wsgi_daemon_lists's nalloc value looks mighty large the
second time around; perhaps that's an issue.
Any ideas? This is very frustrating.
-- Don
--
You received this message because you are subscribed to the Google Groups
"modwsgi" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/modwsgi?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
