[Bug 274799] New: akonadi_imap_resource hangs while syncing Inbox

[Antonis Kanouras]

https://bugs.kde.org/show_bug.cgi?id=274799

           Summary: akonadi_imap_resource hangs while syncing Inbox
           Product: Akonadi
           Version: 4.7
          Platform: openSUSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: IMAP resource
        AssignedTo: ervin at kde.org
        ReportedBy: antonis+kdebugs at metadosis.gr
                CC: vkrause at kde.org, kdepim-bugs at kde.org


Version:           4.7 (using Devel) 
OS:                Linux

Hello, I'm using Akonadi 1.5.80 on KDE 4.6.80 (4.7 Beta1) installed from the
KDE:Unstable:SC OBS repo on openSUSE 11.4.

After creating a new Akonadi IMAP resource, syncing with the IMAP server hangs
with the resource displaying "Syncing Collection 'Junk' (3%)".

The last few lines displayed in Akonadi Console are:
--------------------------------------------------------------------------------------------
akonadi_imap_resource_3 (0x948630) 243 BEGIN 
akonadi_imap_resource_3 (0x948630) 243 OK Begin completed 
akonadi_imap_resource_3 (0x948630) 244 X-AKAPPEND 151 250334
(\MimeType[message/rfc822] "\\RemoteId[2272]" $ATTACHMENT \SEEN)
("PLD:HEAD[1]":2092,"PLD:ENVELOPE[1]":261,"PLD:RFC822[1]":247102) {249455} 
akonadi_imap_resource_3 (0x948630) + Ready for literal data (expecting 249455
bytes) 
akonadi_imap_resource_3 (0x948630) 244 NO Unable to append item flags.
--------------------------------------------------------------------------------------------

Trying to force an "AbortActivity" or "RestartAgent" through the Akonadi
Console does nothing. Only killing the imap resource or restarting the Akonadi
server helps, and that only till it hangs again on some folder.

The IMAP server used is Dovecot 1.2.15-4 as packaged with Debian Squeeze.
Namespaces are enabled on the IMAP server, with "|" as the folder separator.

After talking with Till on #akonadi, he suggested I make an account available
for testing on the server, here are the details:

Server: mail.metadosis.gr
Username: akonaditest01 at metadosis.gr
Password: for-till

Thanks,
Antonio

Reproducible: Sometimes

Steps to Reproduce:
1. Create a new IMAP account (disconnected or not) through either Kmail or the
Akonadi Console.
2. Try to sync.

Actual Results:  
Syncing hangs on some folder most of the times, with no visible error in Kmail.

Expected Results:  
I expected it to successfully sync all folders.

The whole IMAP folder list is visible in Akonadi, and scattered messages in
various folders (the ones it managed to download on each attempt before
hanging).

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