I am running duplicati in a docker on unraid server and I have been having this chronic issue. After successfully doing a complete back up of all my files, I run a new back and after backing up six or seven files, duplicati crashes and the “cannot connect….” message appears.
Eventually the docker just remains in this frozen state. I cannot connect to it, I cannot stop the docker, nothing.
I will wait overnight check the next morning and the docker is still frozen.
The only solution I have found is to disconnect the mounted drives its backing up to, put the back server to sleep, then try to stop the docker and eventually (hours later), it will stop.
Not sure how to fix.
Any help you can provide will be appreciated.