Hi!
We received some more information to this. Are you by chance running these from some scheduler? It seems that if dovecot is logging, some schedulers can actually start blocking on log writes to stdout/stderr, which can lead to this problem.
I wonder if this could be the case for you?
Aki
On 21/01/2024 17:36 EET Aki Tuomi via dovecot <dovecot@dovecot.org> wrote:
Can you try with doveadm -D and send the log?
Aki
On 20/01/2024 19:51 EET Andy Balholm <andy@balholm.com> wrote:
I forgot to mention in my original message that I'm running Dovecot 2.3.21 (47349e2482).
It seems like the stalls are more likely to happen when the type of sync is "incremental" rather than "normal" or "full". (I'm inclined to think they only happen for incremental syncs, but I'm not sure.)
Andy
On Friday, January 19, 2024 9:26:29 AM PST, Andy Balholm wrote:
I have two Dovecot mail servers that replicate to each other. Sometimes there are delays in the synchronization, and I notice that the mail log has entries like this:
Error: dsync(spokane): I/O has stalled, no activity for 600 seconds (last sent=mailbox, last recv=mailbox_state)
Five minutes seems like a long time to sit there waiting with nothing happening. Is there a way to reduce this timeout so that I don't have so many replicaton connections just sitting around doing nothing?
(Of course, a way to prevent the I/O stalls would be great too, but with my limited upload bandwidth, they may be unavoidable.)
Andy
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