Please disregard this. My apologies.
The issue appears to have been caused by an unrelated network issue with
one of the directors, that coincidentally occurred at almost the exact
same time.
A potential improvement would be if the "Ring SYNC seq=XX appears to
have got lost" error message would indicate which director/server it
pertains to.
Best regards,
Eirik Rye
On 16/07/2019 11:17, Eirik Rye via dovecot wrote:
Version 2.3.7 appears to break director ring sync. After upgrading, our
logs are full of these kinds of messages:
Jul 14 04:09:20 yyy dovecot: director: Error: director: User xxx host
lookup failed: Timeout because ring not synced - queued for 30 secs
(Ring not synced for 1410 secs, hash=271838221)
Jul 14 04:09:20 yyy dovecot: director: Error: director: User xxx host
lookup failed: Timeout because ring not synced - queued for 30 secs
(Ring not synced for 1410 secs, hash=3482757093)
As well as:
Jul 14 04:09:21 yyy dovecot: director: Error: Ring SYNC seq=53 appears
to have got lost, resending
These are absent from the logs prior to July 12.
I have downgraded to 2.3.6 in hopes of resolving the issue.
Regards,
Eirik Rye
On 12/07/2019 14:29, Aki Tuomi via dovecot wrote:
Hi!
We are pleased to release Dovecot release v2.3.7.
Tarball is available at
https://dovecot.org/releases/2.3/dovecot-2.3.7.tar.gz
https://dovecot.org/releases/2.3/dovecot-2.3.7.tar.gz.sig
Binary packages are available at https://repo.dovecot.org/
Changes
-------
* fts-solr: Removed break-imap-search parameter
+ Added more events for the new statistics, see
https://doc.dovecot.org/admin_manual/list_of_events/
+ mail-lua: Add IMAP metadata accessors, see
https://doc.dovecot.org/admin_manual/lua/
+ Add event exporters that allow exporting raw events to log files and
external systems, see
https://doc.dovecot.org/configuration_manual/event_export/
+ SNIPPET is now PREVIEW and size has been increased to 200 characters.
+ Add body option to fts_enforced. This triggers building FTS index only
on body search, and an error using FTS index fails the search rather
than reads through all the mails.
- Submission/LMTP: Fixed crash when domain argument is invalid in a
second EHLO/LHLO command.
- Copying/moving mails using Maildir format loses IMAP keywords in the
destination if the mail also has no system flags.
- mail_attachment_detection_options=add-flags-on-save caused email body
to be unnecessarily opened when FETCHing mail headers that were
already cached.
- mail attachment detection keywords not saved with maildir.
- dovecot.index.cache may have grown excessively large in some
situations. This happened especially when using autoexpunging with
lazy_expunge folders. Also with mdbox format in general the cache file
wasn't recreated as often as it should have.
- Autoexpunged mails weren't immediately deleted from the disk. Instead,
the deletion from disk happened the next time the folder was opened.
This could have caused unnecessary delays if the opening was done by
an interactive IMAP session.
- Dovecot's TCP connections sometimes add extra 40ms latency due to not
enabling TCP_NODELAY. HTTP and SMTP/LMTP connections weren't
affected, but everything else was. This delay wasn't always visible -
only in some situations with some message/packet sizes.
- imapc: Fix various crash conditions
- Dovecot builds were not always reproducible.
- login-proxy: With shutdown_clients=no after config reload the
existing connections could no longer be listed or kicked with doveadm.
- "doveadm proxy kick" with -f parameter caused a crash in some
situations.
- Auth policy can cause segmentation fault crash during auth process
shutdown if all auth requests have not been finished.
- Fix various minor bugs leading into incorrect behaviour in mailbox
list index handling. These rarely caused noticeable problems.
- LDAP auth: Iteration accesses freed memory, possibly crashing
auth-worker
- local_name { .. } filter in dovecot.conf does not correctly support
multiple names and wildcards were matched incorrectly.
- replicator: dsync assert-crashes if it can't connect to remote TCP
server.
- config: Memory leak in config process when ssl_dh setting wasn't
set and there was no ssl-parameters.dat file.
This caused config process to die once in a while
with "out of memory".
---
Aki Tuomi
Open-Xchange oy
