You might have to restart a node if you notice unusual behavior such as excessive CPU consumption.
hadbm restartnode [--adminpassword=password | --adminpasswordfile=file] [--agent=maurl] [--startlevel=level] nodeno [dbname]
The dbname operand specifies the database name. The default is hadb.
The nodeno operand specifies the number of the node to restart. Use hadbm status to display the numbers of all nodes in a database.
The hadbm restartnode command has one special option, --startlevel (short form -l), that specifies the level at which to start the node. See Start level option for more information.
hadbm restartnode 1