Sometimes mining client will show you an output such as:
API bind error
TCP API bind address already in use
Bind failed with error
Port is busy
Port already in use
Failed to bind to port
These errors occur when the previous mining client didn't properly exit and didn't close the port that API was using. For that reason, the new mining client can't use that same port.
Our mining OS will detect such issues and fix them, but in case it fails, killing the process or rebooting the rig is required.
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