I'm writing a netbeans ui application in the netbeans ide, that consists of 5 modules. All modules depend on the same jar, which I've created a "library" for. The jar gets periodically updated, so I replaced this jar with a symlink to the output directory where the jar actually gets built. I've also replaced all the places where the jar is copied to (release/module/ext for each module) with symlinks to the correct jar. I periodically have to redo this step. 

My problem is that now, I can't run my application because I get a ZipException presumably when netbeans tries to extract my library jar. Running my application somehow corrupts the library jar.

Before running my application:
'jar tf ovation.jar' correctly lists the classes in the jar

After running my application
'jar tf ovation.jar' gives me the java.util.zip.ZipException