# Nginx core dump **URL:** \ **Category:** NGINX\ **Created:** [September 2, 2010, 12:22am UTC](https://www.ruby-forum.com/t/nginx-core-dump/194281 "2010-09-02T00:22:01Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![iceman](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/46a35a/32.png) [@iceman](https://www.ruby-forum.com/u/iceman)\ **Post date:** [September 2, 2010, 12:22am UTC](https://www.ruby-forum.com/t/nginx-core-dump/194281/1 "2010-09-02T00:22:01Z")
Hi We are using the nginx imap mail module and we are seeing coredumps Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type “show copying” to see the conditions. There is absolutely no warranty for GDB. Type “show warranty” for details. This GDB was configured as “amd64-marcel-freebsd”… Core was generated by `nginx’. Program terminated with signal 11, Segmentation fault. Reading symbols from /home/y/lib/libssl.so.3…done. Loaded symbols for /home/y/lib/libssl.so.3 Reading symbols from /home/y/lib/libcrypto.so.3…done. Loaded symbols for /home/y/lib/libcrypto.so.3 Reading symbols from /usr/lib32/compat/libc.so.4…done. Loaded symbols for /usr/lib32/compat/libc.so.4 Reading symbols from /libexec/ld-elf32.so.1…done. Loaded symbols for /libexec/ld-elf32.so.1 #0 0x0101f169 in ngx\_ssl\_write (c=0x1098040, data=0xffffffff , size=20532628) at src/event/ngx\_event\_openssl.c:1079 1079 src/event/ngx\_event\_openssl.c: No such file or directory. in src/event/ngx\_event\_openssl.c (gdb) bt #0 0x0101f169 in ngx\_ssl\_write (c=0x1098040, data=0xffffffff , size=20532628) at src/event/ngx\_event\_openssl.c:1079 #1 0x01022345 in ngx\_mail\_send (wev=0x1396e28) at src/mail/ngx\_mail\_handler.c:559 #2 0x01025ad6 in ngx\_mail\_imap\_auth\_state (rev=0x126ae28) at src/mail/ngx\_mail\_imap\_handler.c:360 #3 0x0101dcd9 in ngx\_kqueue\_process\_events (cycle=0x1050028, timer=500, ``` flags=1) at src/event/modules/ngx_kqueue_module.c:689 ``` #4 0x01014ca9 in ngx\_process\_events\_and\_timers (cycle=0x1050028) at src/event/ngx\_event.c:245 #5 0x0101b969 in ngx\_worker\_process\_cycle (cycle=0x1050028, data=0x0) at src/os/unix/ngx\_process\_cycle.c:791 #6 0x01019ee7 in ngx\_spawn\_process (cycle=0x1050028, proc=0x101b89c , data=0x0, name=0x1030d3e “worker process”, respawn=Cannot access memory at address 0xffffdc18 ) at src/os/unix/ngx\_process.c:194 #7 0x0101b66d in ngx\_reap\_children (cycle=0x1050028) at src/os/unix/ngx\_process\_cycle.c:612 #8 0x0101abbb in ngx\_master\_process\_cycle (cycle=0x1050028) at src/os/unix/ngx\_process\_cycle.c:180 #9 0x0100350a in main (argc=3, argv=0xffffde40) at src/core/nginx.c:396 'any ideas on debugging this? thanks! Posted at Nginx Forum: > **[nginx core dump](https://forum.nginx.org/read.php?2,126146,126146#msg-126146)** > > Hi We are using the nginx imap mail module and we are seeing coredumps Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it... ---
**Author:** ![iceman](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/46a35a/32.png) [@iceman](https://www.ruby-forum.com/u/iceman)\ **Post date:** [September 2, 2010, 12:33am UTC](https://www.ruby-forum.com/t/nginx-core-dump/194281/2 "2010-09-02T00:33:08Z")
-bash-3.2$ nginx -V nginx version: nginx/0.7.65 built by gcc 2.95.3 20010315 (release) TLS SNI support disabled configure arguments: --prefix=/home/y –conf-path=/home/y/conf/ymail\_nginx/nginx.conf –pid-path=/home/y/var/run/ymail\_nginx.pid –lock-path=/home/y/var/run/ymail\_nginx.lock –error-log-path=/home/y/logs/ymail\_nginx/error.log --without-http –without-http\_rewrite\_module --with-mail --with-mail\_ssl\_module –with-debug --user=nobody --with-cc=/home/y/bin/gcc –with-cc-opt=-I/home/y/include --with-ld-opt=‘-L/home/y/lib -Wl,-rpath /home/y/lib’ Posted at Nginx Forum: > **[Re: nginx core dump](https://forum.nginx.org/read.php?2,126146,126149#msg-126149)** > > Hi We are using the nginx imap mail module and we are seeing coredumps Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it... ---
**Author:** ![iceman](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/46a35a/32.png) [@iceman](https://www.ruby-forum.com/u/iceman)\ **Post date:** [September 2, 2010, 2:22am UTC](https://www.ruby-forum.com/t/nginx-core-dump/194281/3 "2010-09-02T02:22:37Z")
Hello! On Wed, Sep 01, 2010 at 06:20:42PM -0400, iceman wrote: > We are using the nginx imap mail module and we are seeing coredumps […] > (gdb) bt > #0 0x0101f169 in ngx\_ssl\_write (c=0x1098040, > data=0xffffffff , size=20532628) > at src/event/ngx\_event\_openssl.c:1079 > #1 0x01022345 in ngx\_mail\_send (wev=0x1396e28) > at src/mail/ngx\_mail\_handler.c:559 > #2 0x01025ad6 in ngx\_mail\_imap\_auth\_state (rev=0x126ae28) > at src/mail/ngx\_mail\_imap\_handler.c:360 In 0.7.65 (as you claim in next message) src/mail/ngx\_mail\_imap\_handler.c:360 isn’t in ngx\_mail\_imap\_auth\_state() function, it’s in ngx\_mail\_imap\_authenticate(). And the only call to ngx\_mail\_send() in ngx\_mail\_imap\_auth\_state() is at line 298. Do you have any patches applied? Maxim D. ---
**Author:** ![iceman](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/46a35a/32.png) [@iceman](https://www.ruby-forum.com/u/iceman)\ **Post date:** [September 2, 2010, 3:09am UTC](https://www.ruby-forum.com/t/nginx-core-dump/194281/4 "2010-09-02T03:09:27Z")
yes we have some changes. #6 0x01019ee7 in ngx\_spawn\_process (cycle=0x1050028, proc=0x101b89c , data=0x0, name=0x1030d3e “worker process”, respawn=Cannot access memory at address 0xffffdbf8 what does this mean? is this similar to [http://nginx.org/pipermail/nginx-ru/2009-October/029210.html](http://nginx.org/pipermail/nginx-ru/2009-October/029210.html) i can give you the dumps of any variables you would like us to examine. thanks again for your help Posted at Nginx Forum: [http://forum.nginx.org/read.php?2,126146,126190#msg-126190](http://forum.nginx.org/read.php?2,126146,126190#msg-126190)