imap[1771]: exmdb_client: reached maximum connections (1)

kokel

Hello,
I encounter the following error while imapsync runs:

Mar 16 19:45:30 groupware imap[1771]: exmdb_client: reached maximum connections (1) to [::1]:5000//var/lib/gromox/user/

Can't find in the docs the corresponding config directive to increase the maximum connections.

Can someone please point me to the correct config directive and file?

Thanks

iceythegreatest

kokel Hi kokel,
have you found a solution for the problem? I am running into the same and my logs are flooded by the messages.
I already tried to increase the default 5 to 25 connections in

/etc/gromox/exmdb_local.cfg of the exmdb_connection_num variable as this seems to be the only one which makes sense to me.

Maybe any hints on this one by somebody with more Grommunio experience?
Thanks and happy easter.

BR
Icey

crpb

if you look into gromox(7) you will find the port :5000 which leads you to the correct man page.

iceythegreatest

Hi All,
just got some more investigations done on that topic.
The error comes when a user has established a connection to the grommunio server via exchange protocol and then tries to establish another connection via imap to shared mailboxes as the authenticating user (thanks to Impersonation).
Regardless what the exmdb_connection_num says.
Is there a possibility I have overseen which needs to be set to get rid of these messages?

Thanks in advance for a hint.
BR
Icey

ozy

I get those same exmdb_client: reached maximum connections (10) to [::1]:5000//var/lib/gromox/user/ errors whereas I've set /etc/gromox/exmdb_local.cfg:exmdb_connection_num=100 which is 20x the default value.

I've then set the following:
In /etc/gromox/exmdb_provider.cfg

rpc_proxy_connection_num   = 0
notify_stub_threads_num    = 8
exmdb_hosts_allow          = ::1

In /etc/gromox/zcore.cfg

rpc_proxy_connection_num = 50
notify_stub_threads_num  = 20
zcore_fd_limit           = 0

I've also set LimitNOFILE=65536 in the zcore and http services and rebooted my server.

Now I get:

exmdb_client: reached maximum connections (0) to [::1]:5000//var/lib/gromox/user/

For instance, I don't have any IMAP services running, so I'm pretty sure that's some limitation when I try to open multiple cached outlook profiles, which ATM is my only mail client.