[Dovecot] reload without shutting imap connections down
Hello,
we have some problems with users who report connectionproblems to dovecot sometimes. According to the logs there are dovecot reloads at this times. Seems that a reload also causes dovecot to shut all imapconnections down:
Jul 16 13:31:40 myhostname dovecot: master: Warning: SIGHUP received - reloading configuration Jul 16 13:31:40 myhostname dovecot: imap: Server shutting down. bytes=251/675
I tried to reload by initscript or sending -HUP manually to pid, dovecot is shutting down imapconnections and i think this is the reason for users to report this problems with some clients. This seems to be new with versions 2.x, i have some old 1.2.x dovecots running and cant find "Server shutting down" in their logs after reload.
I have still potential to reduce reloads, but cant avoid them completely. Is there a workaround?
Thanks, Hajo
Hajo,
From the looks and sounds of things your Dovecot installation and configuration is crashing without creating a dump. What happens prior to the aforementioned log entries?
Thanks, Dan
On Tue, Jul 16, 2013 at 11:44 AM, Hajo Locke <hajo.locke@gmx.de> wrote:
Hello,
we have some problems with users who report connectionproblems to dovecot sometimes. According to the logs there are dovecot reloads at this times. Seems that a reload also causes dovecot to shut all imapconnections down:
Jul 16 13:31:40 myhostname dovecot: master: Warning: SIGHUP received - reloading configuration Jul 16 13:31:40 myhostname dovecot: imap: Server shutting down. bytes=251/675
I tried to reload by initscript or sending -HUP manually to pid, dovecot is shutting down imapconnections and i think this is the reason for users to report this problems with some clients. This seems to be new with versions 2.x, i have some old 1.2.x dovecots running and cant find "Server shutting down" in their logs after reload.
I have still potential to reduce reloads, but cant avoid them completely. Is there a workaround?
Thanks, Hajo
-- Daniel Reinhardt cryptodan@cryptodan.net http://www.cryptodan.net 301-875-7018(c) 410-455-0488(h)
where do you suspect a crash in "Warning: SIGHUP received"? https://en.wikipedia.org/wiki/Unix_signal
SIGHUP is used for a lot of software to indicate reload the configuration without completly restart a service
Am 16.07.2013 13:49, schrieb Daniel Reinhardt:
From the looks and sounds of things your Dovecot installation and configuration is crashing without creating a dump. What happens prior to the aforementioned log entries?
On Tue, Jul 16, 2013 at 11:44 AM, Hajo Locke <hajo.locke@gmx.de> wrote:
Hello,
we have some problems with users who report connectionproblems to dovecot sometimes. According to the logs there are dovecot reloads at this times. Seems that a reload also causes dovecot to shut all imapconnections down:
Jul 16 13:31:40 myhostname dovecot: master: Warning: SIGHUP received - reloading configuration Jul 16 13:31:40 myhostname dovecot: imap: Server shutting down. bytes=251/675
I tried to reload by initscript or sending -HUP manually to pid, dovecot is shutting down imapconnections and i think this is the reason for users to report this problems with some clients. This seems to be new with versions 2.x, i have some old 1.2.x dovecots running and cant find "Server shutting down" in their logs after reload.
I have still potential to reduce reloads, but cant avoid them completely. Is there a workaround?
Hello,
From the looks and sounds of things your Dovecot installation and configuration is crashing without creating a dump. What happens prior to the aforementioned log entries?
none unexpected behaviour. I run now with debugoptions. There is no evidence of problem. some regular mailtraffic and some people are imap-ideling...then comes the reload and connections are shut down. 2.0.19 ist default of Ubuntu 12.10, but we also use 2.1.7 with same effect. Older Machines with 1.2 dont show this behaviour.
Thanks, Hajo
Hi,
we have some problems with users who report connectionproblems to dovecot sometimes. According to the logs there are dovecot reloads at this times. Seems that a reload also causes dovecot to shut all imapconnections down: Just a wile guess: Could it have something to do with the "shutdown_clients" setting, perhaps..?
Am 16.07.2013 15:18, schrieb Hajo Locke:
Could it have something to do with the "shutdown_clients" setting, perhaps..?
arrgh, did not see there is a adequate setting. works good.... default of shutdown_clients is yes, must be changed between versions?
yes - depends of what you need and want
keep in mind that without this and in case of IMAP with long running connections (over days maybe) the existing connections are still running with the old configuration and depending on the config changes this may or may not be a problem
participants (4)
-
Daniel Reinhardt
-
Hajo Locke
-
mourik jan heupink
-
Reindl Harald