Document how to configure the keepAlive timeout on network sockets

Hi,

Below is the complete description of the issue,

• Running a java application which creates a good number of connections with derby on the machine X.
• We are running the derby database server on the machine lets say Y.
• We explicitly block the listening of 1527 port of system X traffics on system Y in the network until it thrown connection exception and then again established the network between the two systems.
• After the java application has finished execution we found there are still some connections remained open in derby.
•  We can see open connections in derby although we have terminated the java application.
• We have restarted derby to free up these connection.
• Concern here is, how these connection are generated, is these connections are broken /stale connection made during the network reset, if YES then, how to these connection will be auto deleted or handled in derby ?