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

See http://www.oracle.com/technetwork/java/javase/7u51-relnotes-2085002.html for the description of the "problem". Search other-libs/javadb

Depending on your requirement, what I did was go and modify the default security policy

cd $JAVA_HOME/jre/lib/security

Edit java.policy (make a backup first!)

Add the following

grant codeBase "file:${java.home}}/../db/lib/*" {
        permission java.security.AllPermission;
};

Note that this is my requirement.

I'm granting every app who uses the u51 JRE the permission to start Derby.

EDIT

The alternative would be to use a less permissive set of permissions like:

grant codeBase "file:${java.home}}/../db/lib/*" {
    permission java.net.SocketPermission "localhost:1527", "listen,resolve";
};

NetBeans, by default, uses the derby version installed with GlassFish. So my permissions look like this on the Mac. It will be similar on Windows, but the path will need to change.

grant codeBase "file:/Applications/NetBeans/glassfish-4.0/javadb/lib/*" {
    permission java.net.SocketPermission "localhost:1527", "listen,resolve";
};