[Akonadi] [Bug 389829] "Unable to fetch item from backend" after deleting it using akonadi_maildir_resource_0

[Raúl]

https://bugs.kde.org/show_bug.cgi?id=389829

--- Comment #19 from Raúl <rasasi78 at gmail.com> ---
Hello:

I think here we are talking about 2 different issues:

* Issue reported which is that it is not possible to fetch a specific email
from akonadi backend. I think this is related to database engine, database
corruption or akonadiserver lack of sync with database. This is what your
latest journalctl log (https://bugs.kde.org/attachment.cgi?id=144299) could be
related to (or maybe not. I'm not sure) 

* A permanent deadlock in either the communication from akonadi with the
database engine or a problem in the database handling. This is exposed when
sending the `show engine innodb status;` sql statement to the database engine.
This is also exposed with the error message ` Deadlock found when trying to get
lock; try restarting transaction QMYSQL3: Unable to execute statement`  I think
this problem should be followed up in the proper bug report
https://bugs.kde.org/show_bug.cgi?id=434706 This problems prevents going on in
the kmail usage as akonadi cannot properly fetch or handle data from database.
One workaround for my is killing the mariadb server and letting akonadi to
restart it.

Regards,

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