MySQL Error Message
Waiting until I/O thread for channel ‘%s’ finish writing
to disk before stopping. Free some disk space or use ‘KILL’ to
abort I/O thread operation. Notice that aborting the I/O thread
while rotating the relay log might corrupt the relay logs,
requiring a server restart to fix it.
Reason for the Error
ER_STOP_SLAVE_IO_THREAD_DISK_SPACE
was added in 8.0.2, removed after 8.0.32.