Hello,

Aki created this patch a while ago: http://files1.directadmin.com/services/custombuild/patches/maildirlock-crash...

It works perfectly to fix the issue :) Regarding dsync - I don't think it's a good replacement in all the cases, is it? We use maildirlock extensively for compression of email folders (when zlib compression is enabled in dovecot, old emails remain untouched).

-- Best regards, Martynas Bendorius

On 2019-12-07, at 00:46, Stephan Bosch via dovecot dovecot@dovecot.org wrote:

On 22/10/2019 05:44, lty--- via dovecot wrote:

...

Dear all, Dovecot upgraded from v2.2.36 to v2.3.8 There is no problem with the configuration, but the lock directory seems to have an error.

[root@spam dovecot]# /usr/libexec/dovecot/maildirlock /path/to/maildir 1 Panic: BUG: No IOs or timeouts set. Not waiting for infinity. 19276[root@spam dovecot]# Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xe227a) [0x7f1cb567a27a] -> /usr/lib64/dovecot/libdovecot.so.0(+0xe2321) [0x7f1cb567a321] -> /usr/lib64/dovecot/libdovecot.so.0(+0x40f31) [0x7f1cb55d8f31] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf93b4) [>xrf1cb56913b4] -> /usr/ Lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x28) [0x7f1cb5693918] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x5c) [0x7f1cb5691aac] -> /usr/lib64/dovecot/libdovecot. So.0(io_loop_run+0x38) [0x7f1cb5691cc8] -> /usr/libexec/dovecot/maildirlock(main+0x242) [0x7f1cb5b522c2] -> /lib64/libc.so.6(__libc_start_main+0x100) [0x7f1cb5222d20] -> / Usr/libexec/dovecot/maildirlock(+0xfa9) [0x7f1cb5b51fa9]

After google seems to be a bug, this is the address Https://bugs.gentoo.org/682498

If this is not fixed, we are temporarily unable to upgrade to use the new version. Will the next version be fixed? We are looking forward to seeing that we have returned v2.2.36

The maildirlock tool will likely be deprecated. You should use dsync instead for making backups.

Regards,

Stephan.

On 08 Dec 2019, at 05:58, @lbutlr kremels@kreme.com wrote:

On 06 Dec 2019, at 16:28, Martynas Bendorius martynas@martynas.it wrote:

...

when zlib compression is enabled in dovecot, old emails remain untouched

I’ve been considering doing this, or at least looking into how much space we’d save (answer so far, less than you might think), but I am hesitant to “alter” the user’s mail stores without a bit more guidance.

Has anyone found a good walkthrough/guide on setting this up and also on compressing the old mail?

Are there any common issues to watch out for? Is it entirely transparent to the user?

https://wiki2.dovecot.org/Plugins/Zlib says it has moved to https://doc.dovecot.org/plugin-settings/zlib_plugin/ which does not exist.

"Not Found The requested URL /plugin-settings/zlib_plugin/ was not found on this server."

The ULR on that page has the _ character instead of a - in the URL.

https://doc.dovecot.org/plugin-settings/zlib-plugin/ loads and leads to

https://doc.dovecot.org/configuration_manual/zlib_plugin/#zlib-plugin

Which, sadly, does not have example code on actually compressing the existing mail, but does say to use maildirlock.

-- Wife: Who are you talking to? Husb: [on phone] Jon Wife: Aren't you going to talk to me? Husb: I talked to you at dinner, do I need to talk to you again?