Error messages from akonadictl

Hello list,

I've just run "akonadictl restart" after shutting KMail down. The console 
showed these messages:

Connecting to deprecated signal 
QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
org.kde.pim.akonadi_indexer_agent: "DatabaseLockError" "DatabaseLockError: 
Unable to get write lock on /home/prh/.local/share/akonadi/search_db/email/: 
already locked"
org.kde.pim.akonadi_indexer_agent: "DatabaseLockError" "DatabaseLockError: 
Unable to get write lock on /home/prh/.local/share/akonadi/search_db/
emailContacts/: already locked"
org.kde.pim.akonadiserver: "Cannot connect to agent instance with identifier 
'akonadi_maildir_resource_0', error message: ''"
org.kde.pim.akonadi_search_xapian: Could not obtain lock for Xapian 
Database. This is bad
org.kde.pim.akonadi_indexer_agent: "DatabaseLockError" "DatabaseLockError: 
Unable to get write lock on /home/prh/.local/share/akonadi/search_db/notes/: 
already locked"
org.kde.pim.akonadi_search_xapian: Could not obtain lock for Xapian 
Database. This is bad
org.kde.pim.akonadi_indexer_agent: "DatabaseLockError" "DatabaseLockError: 
Unable to get write lock on /home/prh/.local/share/akonadi/search_db/
collections/: already locked"

I restarted akonadi in an attempt to get KMail to show new-message totals in 
the folders to which filters had sent the messages. Sometimes it helps, 
other times not.

-- 
Gentoo stable
sys-kernel/gentoo-sources 4.14.65
QT 5.9.6, KDE frameworks 5.46.0, KDE plasma 5.12.5
KMail 18.04.3, akonadi 18.04.3
x11-drivers/xf86-video-amdgpu 18.0.1, dev-libs/amdgpu-pro-opencl 
18.20.606296