Brandon Armstead

On Sat, Dec 10, 2011 at 9:03 PM, Brandon Armstead <brandon@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@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@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@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@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
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