NickName:Sravan Kumar Ask DateTime:2012-05-11T13:17:09

Java Security Exception for Java AST

I am using eclipse 32bit in my office and developing a java code to parse JavaAST, but when I try to run the program at home I am getting a getting this exception. I am also providing where the Exception is occurred.

How can I Resolve this exception?

Exception Line

ASTParser parser = ASTParser.newParser(AST.JLS3);

Security Exception

Exception in thread "main" java.lang.SecurityException: class "org.eclipse.core.runtime.Plugin"'s signer information does not match signer information of other classes in the same package
    at java.lang.ClassLoader.checkCerts(ClassLoader.java:943)
    at java.lang.ClassLoader.preDefineClass(ClassLoader.java:657)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:785)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.eclipse.jdt.core.dom.ASTParser.initializeDefaults(ASTParser.java:235)
    at org.eclipse.jdt.core.dom.ASTParser.<init>(ASTParser.java:218)
    at org.eclipse.jdt.core.dom.ASTParser.newParser(ASTParser.java:118)
    at tester.runTest.main(runTest.java:33)

Copyright Notice：Content Author:「Sravan Kumar」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/10545809/java-security-exception-for-java-ast

Answers

mgibsonbr 2012-05-11T05:27:46

Please refer to this page on Java documentation: Sealing Packages within a JAR File. That is the probable cause of the error you're seeing.\n\nIn short, when a jar file is sealed the JVM assumes every class from that jar's packages must be defined inside that jar. If there is some code in other parts of your project that belongs to the same package, it will treat is as a security exception.\n\nCheck if the code you're running at home is structured similarly to what you're running in the office. You might have some classes defined in regular .java files, accessible from your CLASSPATH, that belongs to the same package(s) defined in that jar file. Try removing any unnecessary dependencies from your project (so it looks as closely as possible to your working envirnment) and see if that solves your problem.\n\nEdit: I might have mistaken signed for sealed; the relevant docs, then, is Signing and Verifying JAR Files. The probable cause and possible solution remains the same, though...",