How to resolve – java.lang.VerifyError java.lang.SecurityException: Signers of org.junit.runner.Runner do not match signers of other classes in package

Problem:

Have you ever encountered the following exception when you were trying to run a JUnit Class with isolation framework like JMockit?

java.lang.VerifyError: java.lang.SecurityException: Signers of 'org.junit.runner.Runner' do not match signers of other classes in package
	at java.lang.J9VMInternals.verify(J9VMInternals.java:74)
	at java.lang.J9VMInternals.initialize(J9VMInternals.java:129)
	at org.junit.runner.Request.aClass(Request.java:45)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.(JUnit4TestClassReference.java:24)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:40)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:30)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

Root Cause:

After quite a few attempts and reserch, I discovered that the error is due to the conflict with the default version of the JUnit provided by the eclipse.

Solution:

Follow the following steps to resolve the issue. Happy JUniting and JMockiting.

  1. Remove the build reference to existing JUnit jar file from your build path.
  2. Download and use the independent Junit Jar file in your library.
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5 Responses to Read XML File In JAVA using DOM – A Simple Tutorial

  1. harry says:

    I need a tutorial on an exact opposite of this excellent article. That is I need to serialize Java Object to XML. Can you help me in that Kushal??? I wud appreciate it a lot.

    Thanks

  2. Jim says:

    Hey Kushal!
    This is very great and helpful, but I got another question about that. If I have an Element which hasn’t any values, I always get a NullpointerException. Do you have an Idea how to fix/catch that?

    Thank you!

  3. Mridula says:

    The advantage in Java is that there it is not necessary to take care of objects which are no longer used. Garbage collector takes care of these objects unlike C/C++ language where because of this issue the program terminates causing OutOfMemoryErrors.

  4. priya says:

    Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory.

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