Thank you Daniel. Yes, we tried that. But, after some times, errors come back.

We cannot find the root cause yet. We did a rollback.

Regards,

Igor.

De : Daniel-Constantin Mierla <miconda@gmail.com>
Envoyé : jeudi 31 juillet 2025 16:45
À : Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Cc : Igor Potjevlesch <igor.potjevlesch@gmail.com>
Objet : Re: [SR-Users] Re: Unknown character set utf8mb4

I guess you have a newer mysql client library than the server, because utf8mb4 seems to be the default one for latest versions.

You can try to set the character set in the mysql client configuration file on kamailio server, like:

[mysql]
default-character-set=utf8

Cheers,
Daniel

On 31.07.25 14:40, Igor Potjevlesch via sr-users wrote:

Seems not enough because after expire time, all errors came back. Even if, just after a restart, some entries have been added to the location table. Updates seem to be the problem.

Do you have an idea?

Regards,

Igor.

De : Igor Potjevlesch <igor.potjevlesch@gmail.com>
Envoyé : jeudi 31 juillet 2025 12:18
À : sr-users@lists.kamailio.org
Objet : RE: Unknown character set utf8mb4

FYI, finally, it has been fixed adding ?charset=utf8 in the string of the connector, like this:

#!define SQLCONNECTOR "mysql://user:password@IP/dbkamailio?charset=utf8"

Regards,

Igor.

De : Igor Potjevlesch <igor.potjevlesch@gmail.com>
Envoyé : jeudi 31 juillet 2025 10:01
À : sr-users@lists.kamailio.org
Objet : RE: Unknown character set utf8mb4

To complete, taking a network trace, I saw that before queries, I have one trying to "SET NAMES utf8mb4".

I don't know then if this provoke the failure of the following select query.

Regards,

Igor.

De : Igor Potjevlesch <igor.potjevlesch@gmail.com>
Envoyé : jeudi 31 juillet 2025 09:43
À : sr-users@lists.kamailio.org
Objet : Unknown character set utf8mb4

Hello,

We move to fresh version of Kamailio 6. We have a MySQL backend in an old version.

We have many errors like this:

ERROR: db_mysql [km_dbase.c:127]: db_mysql_submit_query(): driver error on query: Unknown character set: 'utf8mb4' (1115)

ERROR: <core> [lib/srdb1/db_query.c:393]: db_do_update(): error while submitting query

ERROR: dialog [dlg_db_handler.c:1000]: update_dialog_dbinfo_unsafe(): could not update database info

ERROR: db_mysql [km_dbase.c:127]: db_mysql_submit_query(): driver error on query: Unknown character set: 'utf8mb4' (1115)

ERROR: <core> [lib/srdb1/db_query.c:158]: db_do_query_internal(): error while submitting query

ERROR: avpops [avpops_impl.c:328]: ops_dbload_avps(): db_load failed

ERROR: db_mysql [km_dbase.c:127]: db_mysql_submit_query(): driver error on query: Unknown character set: 'utf8mb4' (1115)

ERROR: <core> [lib/srdb1/db_query.c:158]: db_do_query_internal(): error while submitting query

ERROR: avpops [avpops_impl.c:328]: ops_dbload_avps(): db_load failed

It looks like the accounting module is not affected because we have writes in acc table.

Registrar is affected because dump from location to location table is not working.

Is there a way to make it work with older version of MySQL?

Regards,

Igor.

Sans virus.www.avast.com

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