midb response is longer than expected (262144), rejecting IMAP command

Kkokel · 2025-03-16T15:10:13+00:00

Hello,
I'm trying to sync mailboxes from non-grommunio imap-server to grommunio with imapsync.
I have one very big mailbox and at the very beginning of the imapsync run grommunio shows this message:

Mar 16 16:03:18 groupware imap[2950]: E-2154: midb response is longer than expected (262144), rejecting IMAP command. Consider raising midb_agent.cfg:midb_agent_command_buffer_size or having fewer mails in the folder. (Approx. limit 37449 messages.)

I have tried to increase the mentioned config directive in /etc/gromox/midb.cfg:

midb_agent_command_buffer_size=16384K

I have restarted grommunio-midb, but the message after this increase is the same.

Am I'm doing something wrong, like wrong config file or something?

Thanks

crpb · 2025-03-24T09:14:46+00:00

have you tried syncing that mailbox and maybe even just the folder with everything in an extra task?

you could also use e.g. --minage .. --maxage .. to limit the amount transferred to split it down to even more jobs

`¯\_(ツ)_/¯`

TTobias · 2025-03-24T20:43:45+00:00

Hi @kokel

have you added the parameter to the right cfg?

Consider raising midb_agent.cfg:midb_agent_command_buffer_size

rg