Hi Timo,
I’ve made freebsd port patch which looks like that:
# cat files/patch-configure.ac
--- configure.ac.orig 2026-06-25 11:03:42 UTC
+++ configure.ac
@@ -363,7 +363,7 @@ AS_CASE(
DOVECOT_IOLOOP
DOVECOT_NOTIFY
AS_CASE(
- ["$notify"],
+ ["$have_notify"],
[none], [BUILD_IMAP_HIBERNATE=0],
[kqueue], [BUILD_IMAP_HIBERNATE=0],
[BUILD_IMAP_HIBERNATE=1])
I’m simulating the situation with telnet:
c idle
+ idling
* 4228 EXPUNGE
* 0 RECENT
* OK Still here
* OK Still here
* 4228 EXISTS
* 1 RECENT
* 4228 EXPUNGE
* 0 RECENT
* 4228 EXISTS
* 1 RECENT
* 4228 EXPUNGE
* 0 RECENT
* OK Still here
* OK Still here
* OK Still here
* OK Still here
* 4228 EXISTS
* 1 RECENT
* 4228 EXPUNGE
* 0 RECENT
* OK Still here
* OK Still here
d idle
c BAD Idle completed.
+ idling
* OK Still here
* 4228 EXISTS
* 1 RECENT
* 4228 EXPUNGE
* 0 RECENT
* OK Still here
* 4228 EXISTS
* 4227 FETCH (FLAGS (\Seen $NotJunk NotJunk))
* 4228 EXPUNGE
* OK Still here
in the log I see following:
Jun 25 14:21:17 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:21:17 classic dovecot[29292]:
imap([email protected])<29454><CLP/EhJVqIguCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:21:17 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:21:17 classic dovecot[29292]:
imap([email protected])<30943><EJZELRJVp5QuCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:26:03 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:26:03 classic dovecot[29292]:
imap([email protected])<30943><EJZELRJVp5QuCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:26:03 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:26:03 classic dovecot[29292]:
imap([email protected])<29454><CLP/EhJVqIguCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:29:28 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:29:28 classic dovecot[29292]:
imap([email protected])<29454><CLP/EhJVqIguCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:33:36 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:33:36 classic dovecot[29292]:
imap([email protected])<33114><cX5QWRJVrZguCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:33:37 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:33:37 classic dovecot[29292]:
imap([email protected])<33112><NlVOWRJVkbEuCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Jun 25 14:34:40 classic dovecot[29292]: imap-hibernate: Error: conn
unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
peer_dev_major value: 18446744073709551615
Jun 25 14:34:40 classic dovecot[29292]:
imap([email protected])<33112><NlVOWRJVkbEuCt00>: Error: Couldn't hibernate
imap client: /var/run/dovecot/imap-hibernate returned failure: Failed to parse
client input: Invalid peer_dev_major value: 18446744073709551615
Here is my piece of my config:
# dovecot -a | grep hibernate
imap_hibernate_timeout = 1 mins
service imap-hibernate {
unix_listener imap-hibernate {
What we can do more?
KR,
Jordan
> On 25 Jun 2026, at 12:34, Timo Sirainen <[email protected]> wrote:
>
> On 24. Jun 2026, at 21.34, Jordan Ostrev via dovecot <[email protected]>
> wrote:
>>
>> Hi,
>> IMAP hibernation compiles and attempts to run on FreeBSD 15.x (tested with
>> Dovecot 2.4.4 and FreeBSD 15.1), but fails at runtime with:
>> plain
>>
>> imap-hibernate: Error: conn unix:imap-hibernate (uid=125): Failed to parse
>> client input: Invalid peer_dev_major value: 18446744073709551615
>>
>> Jun 24 21:27:08 classic dovecot[36888]: imap-hibernate: Error: conn
>> unix:imap-hibernate (uid=125): Failed to parse client input: Invalid
>> peer_dev_major value: 18446744073709551615
>> Jun 24 21:27:08 classic dovecot[36888]:
>> imap([email protected])<37120><ExaV/gNVAdt/AAAB>: Error: Couldn't
>> hibernate imap client: /var/run/dovecot/imap-hibernate returned failure:
>> Failed to parse client input: Invalid peer_dev_major value:
>> 18446744073709551615
> ..
>> 1. Disable hibernation at compile time for kqueue systems, or
>
> It was already supposed to be done, but looks like there's a bug. Can you
> verify if this works? :
>
> diff --git a/configure.ac b/configure.ac
> index 9beacaa299..04f9c8edd6 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -363,7 +363,7 @@ DOVECOT_TYPEOF
> DOVECOT_IOLOOP
> DOVECOT_NOTIFY
> AS_CASE(
> - ["$notify"],
> + ["$have_notify"],
> [none], [BUILD_IMAP_HIBERNATE=0],
> [kqueue], [BUILD_IMAP_HIBERNATE=0],
> [BUILD_IMAP_HIBERNATE=1])
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