Removing mysql-cluster-community-server (7.6.3-1debian7) ...
Failed to stop mysql.service: Unit mysql.service not loaded.
invoke-rc.d: initscript mysql, action "stop" failed.
dpkg: error processing package mysql-cluster-community-server (--remove):
 subprocess installed pre-removal script returned error exit status 5
Failed to start mysql.service: Unit mysql.service not found.
invoke-rc.d: initscript mysql, action "start" failed.
Unit mysql.service could not be found.
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 5
Errors were encountered while processing:
 mysql-cluster-community-server
E: Sub-process /usr/bin/dpkg returned an error code (1)