[Bug 289097] error "Unable to fetch item from backend" when entering IMAP folder

[jos poortvliet]

https://bugs.kde.org/show_bug.cgi?id=289097

jos poortvliet <jospoortvliet at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |jospoortvliet at gmail.com

--- Comment #26 from jos poortvliet <jospoortvliet at gmail.com> ---
Running KDEPIM 4.8.3 here on openSUSE. This error started to become persistent
recently - I saw it before but usually I could just restart akonadi and I could
enter the folder again. Now, I'm stuck: can't use KMail at all as it simply
doesn't load the Inbox and most other folders.

Moreover, updating doesn't work anymore, it doesn't fetch new mail. I've tried
what I could in the akonadiconsole but no amount of fiddling makes it work. One
thing I notice is that the resource goes in 'off-line' mode all the time. I can
put it on-line but this has no effect and after less than 30 sec it's back to
off-line.

The account in question is a GMail account (disconnected imap) with about 5 gb
of mail, the inbox has about 30K messages, the rest is in folders. As I said,
most folders work, some do not. Found no logic there - some small folders don't
work, other large ones are fine.

The debugger in akonadiconsole doesn't seem to be able to give any meaningful
hints. Upon putting the resource on-line and entering a folder which doesn't
work, I often see something like this:
akonadi_imap_resource_0 (0xee5d30) 336 LSUB 7 0 (RESOURCE
akonadi_imap_resource_0) (STATISTICS true ANCESTORS INF) 
akonadi_imap_resource_0 (0xee5d30) * 7 6 (NAME "INBOX" MIMETYPE (message/rfc822
inode/directory) REMOTEID "/INBOX" REMOTEREVISION "" RESOURCE
"akonadi_imap_resource_0" MESSAGES 39438 UNSEEN 45 SIZE 2572135571 CACHEPOLICY
(INHERIT true INTERVAL 15 CACHETIMEOUT -1 SYNCONDEMAND true LOCALPARTS
(ENVELOPE HEAD RFC822)) ANCESTORS ((6
"imap://jospoortvliet@gmail.com@imap.gmail.com/") (0 "")) ENTITYDISPLAY
"(\"Inbox\" \"mail-folder-inbox\" \"\" ())" collectionquota "5629677568
10742595584" imapquota " %%%% STORAGE % 10490816 %%%% STORAGE % 5497732"
collectionannotations "/vendor/cmu/cyrus-imapd/sharedseen false" uidnext
"138565" collectionflags "\\Answered \\Flagged \\Draft \\Deleted \\Seen
$WATCHED $REPLIED receipt-handled $ATTACHMENT $TODO $QUEUED $SENT $IGNORED
$ERROR $FORWARDED $has_cal $SIGNED $NOTJUNK \\*" uidvalidity "594632413"
timestamp "1336591521") 
akonadi_imap_resource_0 (0xee5d30) 336 OK List completed 
AkonadiConsole Browser Widget (0xeeb0f0) 91 NO Unable to fetch item from
backend 

The whole thing is very frustrating and timeconsuming (not even talking about
the fact that without KMail I have to use GMail and it is just so much less
efficient at handling large mail volumes). I hope someone can digg in and debug
this... I'd be happy to help, ping me on IRC.

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