[Bug 233390] Names in message list shown twice or more

[Leo Franchi]

https://bugs.kde.org/show_bug.cgi?id=233390


Leo Franchi <lfranchi at kde.org> changed:

           What    |Removed                     |Added
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                 CC|                            |lfranchi at kde.org




--- Comment #4 from Leo Franchi <lfranchi kde org>  2010-06-08 21:34:09 ---
I'm not sure why this happens, but it's not directly a result of the
messagelist.

I think it's a race condition between the messagelist loading the new item, and
the ETM backing it.

After the message editor is closed, it fires off an ItemCreateJob that creates
the item in the collection. The maildir resource, watching the draft folder,
modifies the item by adding a remoteid. This emits a itemModified() signal,
that is propagated up to the ETM monitoredItemChanged() method, where the old
item (the full mail) and the new item (the full mail with a new remoteid) are
merged.

This merge results in duplication of the headers of the
KMime::Message::Ptr---the akonadi mail serializer, when deserializing the
ENVELOPE part of a message, merges the new envelope with the existing message
headers.

So the ETM is now holding mails with incorrectly duplicated headers.

Now,the messagelist loading happens in batches and async. If the update timer
is called *between* the item creation and the maildir resource item
modification, all is good, because it gets the message before the headers are
duplicated. If the update timer fires *after*, it reads the duplicated-headers
message, and shows them. 

I'm not sure what the proper fix in Akonadi/ETM is for this, will consult the
akonadi gurus :)

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