Quoting ellie timoney <ellie@xxxxxxxxxxxx>:
Hi,
On Sun, 29 Aug 2021, at 8:28 PM, Lists Nethead wrote:
29392: write(6,"S2 SYNCAPPLY MAILBOX %(UNIQUEID
6uxzsiuvofrhrf69dfs1uqxq MBOXNAME user.ppgw SYNC_CRC 2538953411
SYNC_CRC_ANNOT 307862686 LAST_UI"...,4096) = 4096 (0x1000)
29392: write(6,"ATIONS (%(ENTRY /vendor/cmu/cyrus-imapd/thrid USERID
NIL VALUE 87f494ec1d410ff7))) %(UID 18 MODSEQ 194 LAST_UPDATED
1620897300 F"...,4096) = 4096 (0x1000)
29392: write(6,"12 LAST_UPDATED 1620897300 FLAGS () INTERNALDATE
1608458977 SIZE 58108 GUID 03fd1fb95a2083a702fcf679a0e62182698ea1f8
ANNOTATIONS"...,1984) = 1984 (0x7c0)
It's hard to see what it might be complaining about, since the "S2
SYNCAPPLY ..." command it's trying to send is 4096+4096+1984 bytes
long, and is heavily abbreviated in the strace output.
You can log what's actually going over the wire by enabling
telemetry for the user:
https://www.cyrusimap.org/imap/reference/faqs/o-telemetry.html
In this case, you would want to set up telemetry on your replica
server, for the user named by "sync_authname" on your main server.
This will make the replica log all the replication traffic it
receives.
If you can reproduce the bad protocol error by replicating just one
test folder for one test user, then that's probably the least-noisy
way to proceed, and without worry about exposing anyone's mail
contents.
But if you can't reproduce it with a test folder in a test account,
then it might be something specific to the user or mailbox that's
causing the problem, which will be harder to figure out...
Some more. I ran cvt_xlist_specialuse and afterwards sync_server with
the -u option completes without syncing due to mailbox does not exist.
With the -m option, a full sync is start:
1630319017>S2 OK success
<1630319017<S3 SYNCAPPLY MAILBOX %(UNIQUEID 6uxzsiuvofrhrf69dfs1uqxq
[lots of output]
ANNOTATIONS (%(ENTRY /vendor/cmu/cyrus-imapd/thrid USERID NIL VALUE
2de14fdc44df6e6f)))))
1630319017>S3 NO IMAP_PROTOCOL_ERROR Protocol error
<1630319017<Q01 LOGOUT
So now it is S3 rather than S2, whatever that means.
Thanks,
Per
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