[sr-dev] Lost connection to MySQL Server - Frequent Occurrence?

Brandon Armstead brandon at cryy.com
Thu Dec 15 22:15:10 CET 2011


Hello,

    This is still happening - I've tweaked almost all kernel networking /
tcp and mysql configurations to see if I can isolate / resolve this matter
-- however it seems that this error is still persistent.

Any thoughts / suggestions?  Move to postgresql? :P

Sincerely,
Brandon Armstead

On Sat, Dec 10, 2011 at 9:03 PM, Brandon Armstead <brandon at cryy.com> wrote:

> Daniel,
>
>     Just confirming again - that I am still very very frequently seeing
> these syslog events posted ---- I still am unable to locate any plausible
> reason for such events occurring.
>
> The crash that was happening was related to me moving a piece of code down
> into the error block to see what the exact query was that it was failing on
> (during query).  It seemed most queries were related to dialog - however
> not all.  All queries were referencing the same database server (different
> databases).
>
> Any other ideas why this may be happening?  Or any suggestions on how I
> can further track it down / isolate the matter?
>
> Look forward to hearing back from you, thanks!
>
> Sincerely,
> Brandon Armstead
>
>
> On Thu, Dec 8, 2011 at 10:51 PM, Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>>  Hello,
>>
>> was it related to the item in the bug tracker (which I just closed due to
>> PM on tracker from you)? What was the cause for it?
>>
>> Thanks,
>> Daniel
>>
>>
>> On 12/8/11 11:53 PM, Brandon Armstead wrote:
>>
>> Timo,
>>
>>     Let me also add
>>
>>  max_allowed_packet = 512M.
>>
>> On Thu, Dec 8, 2011 at 2:52 PM, Brandon Armstead <brandon at cryy.com>wrote:
>>
>>> Timo,
>>>
>>>      Thanks for this reference - I actually have been playing /
>>> tweaking with various mentioned items in this reference earlier.
>>>
>>>  My current settings are as follows:
>>>
>>>  connect_timeout = 30
>>> net_read_timeout = 180
>>> net_write_timeout = 180
>>>
>>>  The issue still seems to be quite prevalent.  I will say that the
>>> amount of aborted connects currently (41) is way lower than the actual
>>> amount of syslog lost connection errors.
>>>
>>>  Sincerely,
>>>  Brandon Armstead
>>>
>>> On Thu, Dec 8, 2011 at 2:48 PM, Timo Reimann <sr at foo-lounge.de> wrote:
>>>
>>>> Hey Brandon,
>>>>
>>>>
>>>> Am 08.12.2011 um 20:32 schrieb Brandon Armstead:
>>>>  >     I am very very very frequently seeing in logs "Lost connection
>>>> to MySQL Server" --- the MySQL server that it is connecting to is less than
>>>> 1 ms away (essentially sitting in the same rack).
>>>> >
>>>> > Dec  8 19:21:15  /usr/local/sbin/kamailio[4149]: INFO: dialog
>>>> [dlg_db_handler.c:584]: trying to remove dialog [
>>>> c9d5ed0-13c4-4ee10778-92e3eb21-a90244c at XXX.XXX.XXX.XXX], update_flag
>>>> is 4
>>>> > Dec  8 19:21:16  /usr/local/sbin/kamailio[4149]: ERROR: db_mysql
>>>> [km_dbase.c:122]: driver error on query: Lost connection to MySQL server
>>>> during query
>>>> > Dec  8 19:21:16  /usr/local/sbin/kamailio[4149]: ERROR: <core>
>>>> [db_query.c:242]: error while submitting query
>>>> > Dec  8 19:21:16  /usr/local/sbin/kamailio[4149]: ERROR: dialog
>>>> [dlg_db_handler.c:598]: failed to delete database information
>>>> >
>>>> > *** MOD PARAM CONFIG ***
>>>> >
>>>> > # database ping
>>>> > modparam("db_mysql", "ping_interval", 150)
>>>> > modparam("db_mysql", "auto_reconnect", 1)
>>>> >
>>>> > Any thoughts on what may be happening?  It seems the overall
>>>> connection (network) between the two servers is great.
>>>>
>>>>  The MySQL documentation enumerates a number of reasons:
>>>>
>>>> http://dev.mysql.com/doc/refman/5.1/en/error-lost-connection.html
>>>> (This is the URL to MySQL version 5.1 documentation.)
>>>>
>>>> You may want to check those for possible matchings.
>>>>
>>>>
>>>> Cheers,
>>>>
>>>> --Timo
>>>
>>>
>>>
>>
>>
>> _______________________________________________
>> sr-dev mailing listsr-dev at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>>
>>
>> --
>> Daniel-Constantin Mierla -- http://www.asipto.comhttp://linkedin.com/in/miconda -- http://twitter.com/miconda
>>
>>
>
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