Java Database Connection Cant Connect To Derby Database Netbeans 7.4

Question

Im trying to connect to a derby database on netbeans but i get this error every time. I have done some research and seen that poeple have resolved this issue by editing the policy file but this has not helped me. Any help would be appreciated.

Tue Feb 11 11:49:08 EST 2014 : Security manager installed using the Basic server security policy.
Tue Feb 11 11:49:09 EST 2014 : access denied ("java.net.SocketPermission" "localhost:1527" "listen,resolve")
java.security.AccessControlException: access denied ("java.net.SocketPermission" "localhost:1527" "listen,resolve")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:372)
    at java.security.AccessController.checkPermission(AccessController.java:559)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at java.lang.SecurityManager.checkListen(SecurityManager.java:1134)
    at java.net.ServerSocket.bind(ServerSocket.java:375)
    at java.net.ServerSocket.<init>(ServerSocket.java:237)
    at javax.net.DefaultServerSocketFactory.createServerSocket(ServerSocketFactory.java:231)
    at org.apache.derby.impl.drda.NetworkServerControlImpl.createServerSocket(Unknown Source)
    at org.apache.derby.impl.drda.NetworkServerControlImpl.access$000(Unknown Source)
    at org.apache.derby.impl.drda.NetworkServerControlImpl$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.derby.impl.drda.NetworkServerControlImpl.blockingStart(Unknown Source)
    at org.apache.derby.impl.drda.NetworkServerControlImpl.executeWork(Unknown Source)
    at org.apache.derby.drda.NetworkServerControl.main(Unknown Source)

Well, this error isn't coming from trying to connect to your database, it is coming from trying to start the Network Server. Have you followed the instructions at db.apache.org/derby/docs/10.10/adminguide/… — Bryan Pendleton
– Bryan Pendleton, Commented Feb 12, 2014 at 15:00

Hhyperion · Accepted Answer · 2014-03-16 13:13:49Z

3

I had the same problem with netbeans 7.4. Try this:

Find out exactly where the java home is by executing this instruction from Netbeans 7.4:
```
System.out.println(System.getProperty(“java.home”));
```
In my case it was:
```
C:\Program Files\Java\jdk1.7.0_51\jre
```
It was really important to find the right config folder.
Open the file

{your path}\lib\security\java.policy

It should be something like this:

C:\Program Files\Java\jdk1.7.0_51\jre\lib\security\java.policy

You may need administrator privileges.

3. Add this line into the grant block:

    permission java.net.SocketPermission "localhost:1527", "listen,resolve";

Save the file and try to connect to your DB.

Hope this helps.

answered Mar 16, 2014 at 13:13

Hhyperion

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