This is a simple command that can be used to run via a browser to change the log level without needing a restart.
For Hbase Master:
For HBase Region Server:
Please make sure there is no space between '&' and 'level'. There seems to be a formatting issue in HCC because of which a space was introduced in the syntax.
<SERVER-HOSTNAME> : Represents the hostname of the server where the daemon is running.
<DESIRED-LOG-LEVEL>: Represent the log level that is desired by the user to have. Ex. INFO, DEBUG,..