Re: [Fetchmail-users] I see a lot of "client/server synchronization error while fetching from..."

[Carlos E. R. <rob...@te...>]

On 2017-07-28 19:13, Matthias Andree wrote:
> Am 28.07.2017 um 03:12 schrieb Carlos E. R.:
>>
>>
>> Config is:
>>
>> poll imap.telefonica.net with proto imap timeout 20, and tracepolls
>>         user USERNAME, with password PASSWORD, is cer here, and
>> fetchall, expunge 20,  folders Inbox, Spam, Junk
>>
>>
>>
>>
>> The log goes thus:
>>
...

>> <2.6> 2017-07-28 02:30:08 minas-tirith fetchmail 10071 - -  SMTP>. (EOM)
>> <2.6> 2017-07-28 02:30:08 minas-tirith fetchmail 10070 - -  IMAP< *
>> BYE Logging out
>> <2.6> 2017-07-28 02:30:08 minas-tirith fetchmail 10070 - -  IMAP<
>> A0067 OK Logout completed.
>> <2.3> 2017-07-28 02:30:08 minas-tirith fetchmail 10070 - - 
>> client/server synchronization error while fetching from
>> ...@imap.telefonica.net
>> <2.6> 2017-07-28 02:30:08 minas-tirith fetchmail 10070 - -  6.3.26
>> querying imap.telefonica.net (protocol IMAP) at 2017-07-28T02:30:08
>> CEST: poll completed
>> <2.6> 2017-07-28 02:30:08 minas-tirith fetchmail 10070 - -  Query
>> status=7 (ERROR)
>>
>> I have to run fetchmail several times in order to fetch it all,
>> because it aborts at each error.
>>
>> Can I do something?
> 
> Hi Carlos,
> 
> is there anything accessing the mailboxes at the same time, for instance
> another e-mail client (thunderbird, kmail, evolution) that is also
> deleting messages?

There is Thunderbird, of course, but it is not deleting messages. I have
had Th and fetchmail running this way for many years with the same
accounts, and never a problem.


> Fetchmail is downloading and marking 20 messages as deleted, issues
> "EXPUNGE" and the server reports 21 or more messages expunged, which
> confuses fetchmail (meaning: nobody has written code to deal with
> something else accessing the mailbox at the same time).
> 
> If you are 100% sure fetchmail is the only client accessing the server
> at the same time, then file a report to the server's operators,
> otherwise, the workaround would be to not make fetchmail delete messages
> so it doesn't expunge either.

Only fetchmail should be doing expunges. Thunderbird is running but
doing nothing at those times (I run fetchmail manually), so I just watch
the mail count go down on all mail accounts till it gets to zero.

> 
> The relevant source code comment is:
> 
>>    /* if there is a mismatch between the number of mails which should
>>      * have been expunged and the number of mails actually expunged,
>>      * another email client may be deleting mails. Quit here,
>>      * otherwise fetchmail gets out-of-sync with the imap server,
>>      * reports the wrong size to the SMTP server on MAIL FROM: and
>>      * triggers a "message ... was not the expected length" error on
>>      * every subsequent mail */
>>     if (deletions > 0 && deletions != actual_deletions)
>>     {
>>         report(stderr,
>>                 GT_("mail expunge mismatch (%d actual != %d expected)\n"),
>>                 actual_deletions, deletions);
>>         deletions = 0;
>>         return(PS_ERROR);
>>     }

Thanks.


I rather suspect the ISP. They have been doing things.

Another error I see is that now and then ALL email disappears from the
Thunderbird inbox, me doing nothing. Suddenly, the inbox is empty. If I
run fetchmail it also finds nothing.

So I send an email to that account, the mail appears after a minute, and
suddenly, the rest of the inbox reappears, perhaps 300 mails.

-- 
Cheers / Saludos,

		Carlos E. R.
		(from 42.2 x86_64 "Malachite" at Telcontar)