finally, i found the reason of this error.

I have installed guacamole on centos 7 server. After research i found this error :

### Cause: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1265527 > 1048576). You can change this value on the server by setting the max_allowed_packet' variable.

and after it appears an 500 html error.

Then in the file "/etc/my.cnf.d/server.cnf I had this line :

max_allowed_packet = 10M

After, I restart mariadb service.

Now I can have more of 24 000 users in my database.

Sorry for the inconvenience :-[


Le 25/07/2017 12:05, XAVIER HENRY a écrit :

After searching, the problem is not on the web application. :-)

I installed a local server and I was able to integrate more than 60,000 accounts, without errors on my web client. It's slow but the web application works !!!

The problem is with an internal proxy I think. When the size of json response is greater than 5M ...

Sorry to have bothered you


Le 24/07/2017 16:56, XAVIER HENRY a écrit :


I’m using guacamole with guacamole-auth-jdbc.

When I have more of 24000 users I can’t see them in the admin interface. I have this error :

With details :


But when then number of users is under 24000, all is ok :



With details :



Have you the same thing ? Do you think it is a bug ???