Hello,
I recently upgraded a Dovecot install from 2.3.20 to 2.3.21 from the 2.3-latest
repository (
http://repo.dovecot.org/ce-2.3-latest/rhel/$releasever/RPMS/$basearch )
However since then, I seem to be getting:
Jan 13 01:08:32 mail01 dovecot[3646235]: imap-login: Login:
user=<u...@example.com>, method=PLAIN, rip=35.243.xxx.xxx, lip=176.9.xxx.xxx,
mpid=3646265, TLS, session=<o9jJlMgOFzMj86dT>
Jan 13 01:09:03 mail01 dovecot[3646235]: imap-hibernate: Error: conn
unix:imap-hibernate (pid=3646265,uid=1010): IMAP client fd not received
Jan 13 01:09:03 mail01 dovecot[3646235]:
imap(u...@example.com)<3646265><o9jJlMgOFzMj86dT>: Error: Couldn't hibernate
imap client: /run/dovecot/imap-hibernate disconnected
This seems to be the case for every email-account on the system.
Related configs:
20-imap.conf:
protocol imap {
imap_hibernate_timeout = 30s
imap_idle_notify_interval = 24 mins
mail_plugins = $mail_plugins imap_quota quota_clone zlib fts fts_solr
mail_max_userip_connections = 20
}
10-master.conf:
service imap {
# Most of the memory goes to mmap()ing files. You may need to increase this
# limit if you have huge mailboxes.
#vsz_limit = $default_vsz_limit
unix_listener imap-master {
user = $default_internal_user
}
extra_groups = $default_internal_group
}
service imap-hibernate {
unix_listener imap-hibernate {
mode = 0660
group = $default_internal_group
}
}
10-metrics.conf
event_exporter log {
format = json
format_args = time-rfc3339
transport = log
}
metric hibernation_logging {
exporter = log
filter = event=imap_client_hibernated OR event=imap_client_unhibernated
}
socket:
$ stat /run/dovecot/imap-hibernate
File: /run/dovecot/imap-hibernate
Size: 0 Blocks: 0 IO Block: 4096 socket
Device: 19h/25d Inode: 48551407 Links: 1
Access: (0660/srw-rw----) Uid: ( 0/ root) Gid: ( 97/ dovecot)
Context: system_u:object_r:dovecot_var_run_t:s0
Access: 2024-01-13 01:03:07.432084831 +0100
Modify: 2024-01-13 00:50:56.394662577 +0100
Change: 2024-01-13 00:50:56.394662577 +0100
Birth: -
>From the change log, I see the following:
- imap-hibernate: If an IMAP client unhibernation timed out with
"(version received)", the unhibernation could still have successfully
finished later on and continued working normally. This was rather
confusing, because imap-hibernate already logged that the client got
disconnected. Avoid this by forcing the connection to shutdown on
unhibernation timeout.
By the looks of it, it seems hibernation never actually happens anymore as of
the new version.
Downgrading to version 2.3.20 again seems to make hibernation function again
based on the event logs.
In 2.3.21 I only see events being logged for `imap_client_hibernated` which
matches the /run/dovecot/imap-hibernate disconnected:
"error":"/run/dovecot/imap-hibernate disconnected"
In 2.3.20 I get both imap_client_hibernated and imap_client_unhibernated events
(that it happens and when idle_done is triggered).
Thank you in advance!
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