Problem syncing contacts with cyrus-imapd 3.10

[BlackZork]

Hi,

I've updated my home instance of cyrus-imapd from 3.6 to 3.10 and DavX5 stopped to work.
Thunderbird and roundcube work Ok.

I've captured logs from server with debugging logging enabled:
cyrus-debug.txt

and logs from Davx5:
logcat.txt
debug-info.txt

It looks like a problem related to sync token, which is not sent in second REPORT request by Dav5x ?

Any hints how to fix it?

[BlackZork]

This a server log from successfull REPORT request from thunderbird to compare:

Oct 27 15:22:25 black cyrus/https[4188171]: process request
Oct 27 15:22:25 black cyrus/https[4188171]: http_read_req_body(flags=0x8, framing=2)
Oct 27 15:22:25 black cyrus/https[4188171]: http_read_body(flags=0x28, framing=2)
Oct 27 15:22:25 black cyrus/https[4188171]: scanned token data:,1669242163-1187 to 2 1669242163 1187 0
Oct 27 15:22:25 black cyrus/https[4188171]: write_body(code = -1964266998, flags.te = 0x4, len = 151)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Date: Sun, 27 Oct 2024 14:22:25 GMT)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Connection: Keep-Alive)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Keep-Alive: timeout=300)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Strict-Transport-Security: max-age=600)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Vary: Accept-Encoding, Brief, Prefer)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Accept-Encoding: deflate, gzip)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Content-Type: application/xml; charset=utf-8)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Content-Encoding: zstd)
Oct 27 15:22:25 black cyrus/https[4188171]: simple_hdr(Transfer-Encoding: chunked)
Oct 27 15:22:25 black cyrus/https[4188171]: localhost.localdomain [127.0.0.1] as "[email protected]" with "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Thunderbird/128.2.3" via SESSIONID=<cyrus-1730038945-4188171-1-13983089926497196559>; "REPORT /dav/addressbooks/user/[email protected]/Default/ HTTP/1.1" (origin=https://zork.pl; auth=Basic; type=sync-collection; token=data:,1669242163-1187; depth=1) => "HTTP/1.1 207 Multi-Status" (tx-encoding=chunked; cnt-encoding=zstd) [timing: cmd=0.011032 net=0.000063 total=0.011095]

[rfc2822]

Sounds like cyrusimap/cyrus-imapd#4985 (see also #952)

This is very likely a Cyrus problem. The request with empty sync-token looks OK, but the server replies with 403 instead of sending all entries.

[BlackZork]

Many thanks!

I had libxml2 2.13.3 and after checking diff between 2.13.3 and 2.13.4 I decided to upgrade libxml2 only. After restarting cyrus-imapd problem goes away.