[kmail2] [Bug 344670] New: KMail becomes unable to fetch e-mail after trying to view a specific folder

[Arvid]

https://bugs.kde.org/show_bug.cgi?id=344670

            Bug ID: 344670
           Summary: KMail becomes unable to fetch e-mail after trying to
                    view a specific folder
           Product: kmail2
           Version: 4.14.4
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: message list
          Assignee: kdepim-bugs at kde.org
          Reporter: behold at behold.se

(The actual version I'm using is 4.14.5, from the official Arch Linux
repositories, but as it was unavailable in the version list I chose the closest
stable version.)

I'm unsure if this is a problem in KMail or Akonadi, but since KMail is where
the symtpoms manifest themselves, and I know next to nothing about how the
interaction between KMail and Akonadi works, I'm reporting this here to start
off.

I have KMail configured to sync with two IMAP accounts, one being a Gmail
account, set up using Google Apps, and the other being some kind of Outlook Web
App(?) account.

The Gmail account has three subfolders to the Inbox folder. I am able to fetch
and read messages from the Inbox folder as well as two of the subfolders, but
whenever I try to view the third subfolder KMail becomes unable to fetch
messages, including messages from other folders.

Reproducible: Always

Steps to Reproduce:
1. Quit KMail
2. Restart Akonadi (akonadictl restart)
3. Start KMail
4. Switch to the folder in question


Actual Results:  
KMail stalls at "Retrieving Folder Contents - Please wait" indefinitely, and is
unable to fetch messages from any other folder or even other accounts.

In the terminal I see the following output from Akonadi when switching to the
problematic folder:

posting retrieval request for item 41750  there are  1  queues and  0  items in
mine 
request for item 41750 still pending - waiting 
processing retrieval request for item 41750  parts: ("RFC822")  of resource:
"akonadi_imap_resource_2"

At this point the progress bar starts counting up from 0% to 100% for about 10
seconds. Once the progress bar reaches 100%, it immediately jumps back to 96%.
At the same time I see output along the following lines from Akonadi, I think
this might be related to the message KMail was trying to fetch:

40616 "3041" "<91AFCD21.4365920 at gmail.com>" 
40630 "3041" "<91AFCD21.4365920 at gmail.com>"

Meanwhile KMail is displaying "Retrieving Folder Contents - Please wait"
indefinitely. This does not go away if I try to switch to another folder, even
if the folder belongs to my other account. After several minutes I get the
following error message:

request for item 41750 "3206" failed: "Unable to retrieve item from resource:
Did not receive a reply. Possible causes include: the remote application did
not send a reply, the message bus security policy blocked the reply, the reply
timeout expired, or the network connection was broken." 
ItemRetrieverException :  Unable to retrieve item from resource: Did not
receive a reply. Possible causes include: the remote application did not send a
reply, the message bus security policy blocked the reply, the reply timeout
expired, or the network connection was broken.

KMail continues to be unable to fetch/display messages however.

Expected Results:  
KMail should fetch a message from the folder and display it, and afterwards
allow me to fetch other messages.

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