The self-heal daemon runs in the background and diagnoses issues with bricks and automatically initiates a self-healing process every 10 minutes on the files that require healing. To see the files that require healing, use:

# gluster volume heal myvolume info

You can start a self-healing manually using:

# gluster volume heal myvolume

To list the files in a volume which are in split-brain state, use:

# gluster volume heal myvolume info split-brain

See the upstream documentation for the methods available to avoid and recover from split-brain issues.