104: Connection reset by peer

Wed May 8 12:29:19 UTC 2013

Hi All,

my apologies, but i think the issue is that php is crashing. was not
looking at the syslog:

 [2617248.127349] php5-fpm[504727] general protection ip:6787a9
sp:7fff22c5c6f0 error:0 in php5-fpm[400000+700000]

gdb backtrace shows

#0  0x00000000006787a9 in ?? ()
#1  0x0000000000678940 in ?? ()
#2  0x00000000006ad82e in zend_hash_destroy ()
#3  0x000000000069e4ab in _zval_dtor_func ()
#4  0x000000000069031a in _zval_ptr_dtor ()
#5  0x00000000006ad808 in zend_hash_destroy ()
#6  0x000000000069e4ab in _zval_dtor_func ()
#7  0x000000000069031a in _zval_ptr_dtor ()
#8  0x00007fe9a25c056f in apc_free_class_entry_after_execution
(src=0x215e228) at /tmp/pear/temp/APC/apc_compile.c:1992
#9  0x00007fe9a25c3ad6 in apc_deactivate () at
/tmp/pear/temp/APC/apc_main.c:948
#10 apc_request_shutdown () at /tmp/pear/temp/APC/apc_main.c:1042
#11 0x00007fe9a25b85b5 in zm_deactivate_apc (type=<optimized out>,
module_number=<optimized out>) at /tmp/pear/temp/APC/php_apc.c:407
#12 0x00000000006a6d94 in ?? ()
#13 0x000000000063efd5 in php_request_shutdown ()
#14 0x000000000042d5b9 in ?? ()
#15 0x00007fe9a2dbe76d in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#16 0x000000000042e231 in _start ()

apc seems to be dying. will try to check what's wrong. again my apologies
on disturbing the list.

regards,
Ron

On Wed, May 8, 2013 at 8:11 PM, B.R. <reallfqq-nginx at yahoo.fr> wrote:

> Do you have some information on the number of concurrent connections?
> Since you already played with the 'max_requests' parameter too, it seems
> not to be the reason of the trouble. But better be safe than sorry.
>
> If your actual number of connections/second is greater than what the
> configuration is expecting then you'll have your answer. But you don't
> provide information allowing to decide on this, and it seems you tried
> blind changes only.
> Could you provide your input requests rate?
> ---
> *B. R.*
>
>
> On Wed, May 8, 2013 at 7:58 AM, ron ramos <nhadie at gmail.com> wrote:
>
>> hi,
>>
>> i've seen that info as well  ( yes i tried searching for answers as
>> mentioned )  and it did not help me unfortunately.
>> i've increased from 500 to 1000 to 10000. increase children servers etc.
>>
>> regards,
>> ron
>>
>>
>> On Wed, May 8, 2013 at 7:42 PM, B.R. <reallfqq-nginx at yahoo.fr> wrote:
>>
>>> After a very long search on Google (almost 15s, including keyboard
>>> input), I found astonishing help, based on the information you provided.
>>>
>>> About the FPM children burying, I found a resource on StackOverflow
>>> linking back to the Nginx forum (ML archive):
>>>
>>> http://stackoverflow.com/questions/2551185/tons-of-fpm-children-bury-in-php-fpm-log-php-5-2-13php-fpm-0-5-13-nginx-0
>>>
>>> It seems, at first glance, that the children bury and its respawn works
>>> as intended, if you reach the requests limit number. I dunno how to check
>>> that is the case though. Your log entries seem to be silent about that.
>>>
>>> My 2 cents,
>>> ---
>>> *B. R.*
>>>
>>>
>>> On Wed, May 8, 2013 at 7:29 AM, ron ramos <nhadie at gmail.com> wrote:
>>>
>>>>
>>>> Hi All,
>>>>
>>>> I understand that this is a generic error, but it has been frustrating
>>>> trying to solve this issue and i'm not able to find an answer anywhere.
>>>> basically i have an application which is running fine using apache, but we
>>>> wanted to try nginx/php5-fpm:
>>>>
>>>> some parts of my application has this connection reset issue, sometimes
>>>> it works but inconsistent.
>>>> if it does not work, i restart php5-fpm and it will work again, but
>>>> after sometime it will have the same issue.
>>>>
>>>> i'm using:
>>>>
>>>> # nginx -v
>>>> nginx version: nginx/1.4.0
>>>>
>>>> # php5-fpm -v
>>>> PHP 5.4.14-1~precise+1 (fpm-fcgi) (built: Apr 11 2013 17:18:51)
>>>> Copyright (c) 1997-2013 The PHP Group
>>>> Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies
>>>>
>>>> when i enable debug this is the only thing i can see;
>>>>
>>>> [08-May-2013 18:08:32.545758] DEBUG: pid 358359, fpm_got_signal(), line
>>>> 72: received SIGCHLD
>>>> [08-May-2013 18:08:32.545884] WARNING: pid 358359, fpm_children_bury(),
>>>> line 252: [pool legacy] child 358423 exited with code 3 after 342.958315
>>>> seconds from start
>>>> [08-May-2013 18:08:32.548943] NOTICE: pid 358359, fpm_children_make(),
>>>> line 421: [pool legacy] child 359398 started
>>>> [08-May-2013 18:08:32.549023] DEBUG: pid 358359, fpm_event_loop(), line
>>>> 411: event module triggered 1 events
>>>>
>>>>
>>>> i have tried different config changes like using static instead of
>>>> dynamic..increase max_request..increase child ...increase server..etc.
>>>>
>>>> one thing i really need is to identify what is causing that connection
>>>> peer but logs is not really helping. i tried strace and it still did not
>>>> show me anything.
>>>>
>>>> any other way to debug or identify what is causing this issue? totally
>>>> clueless right now.
>>>>
>>>> thank you in advanced.
>>>>
>>>> Regards,
>>>> Ron
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
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>>
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