worker process exited on signal 11

[Maxim Dounin]

Hello!

On Tue, Apr 17, 2012 at 09:44:13AM -0400, mscheel wrote:

> Dear all,
> 
> error logs show this error (worker process exited on signal 11). The
> error appears after ~1 hour, then with the half of the worker processes.
> No problems with 1.0-versions of nginx. Problem existed in 1.1.18
> already.
> 
> I'm using a custom rpm build with the following additional modules:
> --add-module=/root/rpm/SOURCES/agentzh-headers-more-nginx-module-3580526
> \
> --add-module=/root/rpm/SOURCES/FRiCKLE-ngx_cache_purge-e34bd2c \
> --add-module=/root/rpm/SOURCES/substitutions4nginx-read-only \

Are you able to reproduce this without 3rd party modules?

[...]

> (gdb) bt
> #0  0x000000000042cbe8 in ngx_readv_chain (c=0x2b508a1d43d0,
> chain=0x602348) at src/os/unix/ngx_readv_chain.c:195

Please provide gdb output of the following commands:

fr 0
p chain
p *chain

> #1  0x000000000042b133 in ngx_event_pipe (p=0x747170, do_write=<value
> optimized out>) at src/event/ngx_event_pipe.c:271

fr 1
p *p

> #2  0x000000000045410e in ngx_http_upstream_process_upstream
> (r=0x69ef00, u=0x746db8) at src/http/ngx_http_upstream.c:2641

fr 2
p *r
p *u

[...]

It might be also helpful to see full configuration used.

Maxim Dounin