Unable to start derby database from Netbeans 7.4

Question

I downloaded Netbeans 7.4 and Java 7 Update 51. I get the below error when I try to start Java DB or derby connection from Netbeans. This is on a windows 8 PC. I downloaded

Answer 1

According to Java™ SE Development Kit 7, Update 51 Release Notes

Change in Default Socket Permissions

The default socket permissions assigned to all code including untrusted code have been changed in this release. Previously, all code was able to bind any socket type to any port number greater than or equal to 1024. It is still possible to bind sockets to the ephemeral port range on each system. The exact range of ephemeral ports varies from one operating system to another, but it is typically in the high range (such as from 49152 to 65535). The new restriction is that binding sockets outside of the ephemeral range now requires an explicit permission in the system security policy.

Most applications using client tcp sockets and a security manager will not see any problem, as these typically bind to ephemeral ports anyway. Applications using datagram sockets or server tcp sockets (and a security manager) may encounter security exceptions where none were seen before. If this occurs, users should review whether the port number being requested is expected, and if this is the case, a socket permission grant can be added to the local security policy, to resolve the issue.

This means that you have to explicity set the permissions for your application to be able to access the ports range between 1025 and 49151. You can therefore grant this permission by appending this line in the list of permissions granted:

Visit your Java Home Directory and access your policy file at $JAVA_HOME/jre/lib/security/java.policy and make the following changes.

grant{
     //List of granted permissions
     permission java.net.SocketPermission "localhost:1527", "listen";
}