After successfully updating Tumbleweed to the latest snapshot (by cleanly
logging out and running the upgrade in a virtual console) and rebooting my
computer, while the upgrade was successful, the akonadiserver no longer starts
which prevents me from using KMail (the only email client working for me from a
performance perspective considering the large size of my email accounts). So
basically I cannot do my job anymore.

Here is the error message I am getting when trying to run "akonadictl start"
(for clarity, I have not included the whole log since the other parts show that
everything is starting fine until that point):

org.kde.pim.akonadiserver: DATABASE ERROR:
org.kde.pim.akonadiserver:   Error code: "2013"
org.kde.pim.akonadiserver:   DB error:  "Lost connection to server during
query"
org.kde.pim.akonadiserver:   Error text: "Lost connection to server during
query QMYSQL3: cannot execute query"
org.kde.pim.akonadiserver:   Values: QMap((":0", QVariant(qlonglong, 1))(":1",
QVariant(qlonglong, 2))(":2", QVariant(qlonglong, 16)))
org.kde.pim.akonadiserver:   Query: "SELECT count(DISTINCT PimItemTable.id),
sum(PimItemTable.size), sum(CASE WHEN ( SeenFlags.Flag_id IS NOT NULL OR
IgnoredFlags.Flag_id IS NOT NULL ) THEN 1 ELSE 0 END) FROM PimItemTable LEFT
JOIN PimItemFlagRelation AS SeenFlags ON ( PimItemTable.id =
SeenFlags.PimItem_id AND SeenFlags.Flag_id = :0 ) LEFT JOIN PimItemFlagRelation
AS IgnoredFlags ON ( PimItemTable.id = IgnoredFlags.PimItem_id AND
IgnoredFlags.Flag_id = :1 ) WHERE ( collectionId = :2 )"
org.kde.pim.akonadiserver: database server stopped unexpectedly
org.kde.pim.akonadiserver: DATABASE ERROR:
org.kde.pim.akonadiserver:   Error code: "2006"
org.kde.pim.akonadiserver:   DB error:  "Server has gone away"
org.kde.pim.akonadiserver: DATABASE ERROR:
org.kde.pim.akonadiserver:   Error text: "Server has gone away QMYSQL3:
Impossible d'ex���cuter la requ���te"
org.kde.pim.akonadiserver:   Error code: "2013"
org.kde.pim.akonadiserver:   Values: QMap((":0", QVariant(qlonglong, 1))(":1",
QVariant(qlonglong, 2))(":2", QVariant(qlonglong, 17)))
org.kde.pim.akonadicore: "QLocalSocket���: Connexion ferm���e"
"/run/user/1000/akonadi/akonadiserver-cmd.socket"
org.kde.pim.akonadicore: Socket error occurred: "QLocalSocket���: connection
closed"
org.kde.pim.akonadicore: "QLocalSocket���: connection closed"
"/run/user/1000/akonadi/akonadiserver-cmd.socket"
org.kde.pim.akonadicore: Socket error occurred: "QLocalSocket���: connection
closed"

Afterwards, these connection closed error messages cascade until the process
crashes. What can I do?