Nginx stuck processes

Tue Nov 22 05:51:56 UTC 2011

Sandesh K. wrote in post #1027339:
> Hello Igor,
>
> Do you have any update on this?

Igor,

We upgraded the OS as well as Nginx to 1.1.10 latest stable. But the 
problem still persists.

*2.6.18-164.el5PAE
*CentOS release 5.4 (Final)
*nginx: nginx version: nginx/1.0.10
*nginx: built by gcc 4.1.2 20080704 (Red Hat 4.1.2-46)
nginx: configure arguments: --prefix=/usr/local/nginx 
--sbin-path=/usr/local/nginx/sbin/nginx 
--conf-path=/etc/nginx/conf/nginx.conf 
--error-log-path=/var/log/nginx/logs/error.log 
--pid-path=/var/run/nginx.pid --lock-path=/var/log/nginx/logs/nginx.lock 
--with-mail --without-http --without-mail_imap_module 
--without-mail_smtp_module

GNU gdb Red Hat Linux (6.3.0.0-0.30.1rh)
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "i386-redhat-linux-gnu".
(gdb) attach 65233
Attaching to process 65233
Reading symbols from /usr/local/nginx/sbin/nginx...done.
Using host libthread_db library "/lib/tls/libthread_db.so.1".
Reading symbols from /lib/tls/libpthread.so.0...done.
[Thread debugging using libthread_db enabled]
[New Thread -1218550432 (LWP 65233)]
Loaded symbols for /lib/tls/libpthread.so.0
Reading symbols from /lib/libcrypto.so.4...done.
Loaded symbols for /lib/libcrypto.so.4
Reading symbols from /lib/tls/libc.so.6...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /lib/ld-linux.so.2...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/kerberos/lib/libgssapi_krb5.so.2...done.
Loaded symbols for /usr/kerberos/lib/libgssapi_krb5.so.2
Reading symbols from /usr/kerberos/lib/libkrb5.so.3...done.
Loaded symbols for /usr/kerberos/lib/libkrb5.so.3
Reading symbols from /usr/kerberos/lib/libcom_err.so.3...done.
Loaded symbols for /usr/kerberos/lib/libcom_err.so.3
Reading symbols from /usr/kerberos/lib/libk5crypto.so.3...done.
Loaded symbols for /usr/kerberos/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libdl.so.2...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libz.so.1...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libnss_files.so.2...done.
Loaded symbols for /lib/libnss_files.so.2
0x0031ebba in _int_malloc () from /lib/tls/libc.so.6
(gdb) backtrace
#0 0x0031ebba in _int_malloc () from /lib/tls/libc.so.6
#1 0x0031f89c in _int_memalign () from /lib/tls/libc.so.6
#2 0x0031e2c7 in memalign () from /lib/tls/libc.so.6
#3 0x00320367 in posix_memalign () from /lib/tls/libc.so.6
#4 0x0805da38 in ngx_memalign (alignment=16, size=4069528, log=0x108) at 
src/os/unix/ngx_alloc.c:56
#5 0x0804b917 in ngx_palloc_block (pool=0x8d0b9b0, size=52) at 
src/core/ngx_palloc.c:184
#6 0x0804b892 in ngx_palloc (pool=0x8d0b9b0, size=52) at 
src/core/ngx_palloc.c:138
#7 0x0804babf in ngx_pcalloc (pool=0x8d0b9b0, size=52) at 
src/core/ngx_palloc.c:304
#8 0x0804d0b7 in ngx_create_temp_buf (pool=0x8d0b9b0, size=4096) at 
src/core/ngx_buf.c:16
#9 0x08067508 in ngx_mail_proxy_init (s=0x8d0da20, peer=0x8d0c294) at 
src/mail/ngx_mail_proxy_module.c:167
#10 0x080666e2 in ngx_mail_auth_http_process_headers (s=0x8d0da20, 
ctx=0x8d12498) at src/mail/ngx_mail_auth_http_module.c:832
#11 0x0806606c in ngx_mail_auth_http_ignore_status_line (s=0x8d0da20, 
ctx=0x8d12498) at src/mail/ngx_mail_auth_http_module.c:448
#12 0x08065f4b in ngx_mail_auth_http_read_handler (rev=0x3e2180) at 
src/mail/ngx_mail_auth_http_module.c:331
#13 0x0806194e in ngx_rtsig_process_events (cycle=0x8cdb248, 
timer=147634972, flags=1) at src/event/modules/ngx_rtsig_module.c:400
#14 0x0805ad0c in ngx_process_events_and_timers (cycle=0x8ccb228) at 
src/event/ngx_event.c:245
#15 0x08060952 in ngx_worker_process_cycle (cycle=0x8ccb228, data=0x0) 
at src/os/unix/ngx_process_cycle.c:801
#16 0x0805ef60 in ngx_spawn_process (cycle=0x8ccb228, proc=0x806089d 
<ngx_worker_process_cycle>, data=0x0, name=0x806be29 "worker process", 
respawn=-3) at src/os/unix/ngx_process.c:196
#17 0x080601f6 in ngx_start_worker_processes (cycle=0x8ccb228, n=30, 
type=-3) at src/os/unix/ngx_process_cycle.c:360
#18 0x0805fbe7 in ngx_master_process_cycle (cycle=0x8ccb228) at 
src/os/unix/ngx_process_cycle.c:136
#19 0x0804a116 in main (argc=3, argv=0x8ccb9a4) at src/core/nginx.c:405
(gdb) quit

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