To stop replication of a database, connect to the master database using the stopMaster=true connection URL attribute. The master sends the remaining log records that await shipment, and then sends a stop replication command to the slave. The slave then writes all logs to disk and shuts down the database. For example, for a database named wombat, you might specify the following connection URL:
To stop replication on the slave system if the connection to the master is lost, use the stopSlave=true connection URL attribute.
See the Derby Reference Manual for details about these attributes.
You cannot resume replication after it has been stopped. You need to start replication over again from the beginning using the startMaster=true attribute, as described in Starting and running replication.