Bug 62503 Classloader problem with older versions of JUnit [JUnit]
I have a project with a version 3.6 junit.jar on the classpath. In 3.0M8 when I run a test with an assertEquals() that fails, I get this error: java.lang.NoClassDefFoundError: junit/framework/ComparisonFailure at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.addFailure(RemoteTestRunner.java:533) at junit.framework.TestResult.addFailure(TestResult.java:46) at junit.framework.TestResult.runProtected(TestResult.java:127) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:131) at junit.framework.TestSuite.runTest(TestSuite.java:173) at junit.framework.TestSuite.run(TestSuite.java:168) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:410) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:294) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:182) Exception in thread "main" This used to work with Eclipse 2.1 (which also had JUnit 3.8.1 built in), and it disappears when I upgrade my copy of junit.jar to 3.8.1 to match the Eclipse one.
org.eclipse.jdt.junit.runtime/src/org/eclipse/jdt/internal/junit/runner/RemoteTestRunner.java
runFailed(JUnitMessages.getFormattedString("RemoteTestRunner.error.connect", new String[]{fHost, Integer.toString(fPort)} )); 
		exception.printStackTrace();
		return false;
	}
	/**
	 * Shutsdown the connection to the remote test listener.
	 */
	private void shutDown() {
		if (fWriter != null) {
			fWriter.close();
			fWriter= null;
		}
		try {
			if (fReaderThread != null)   {
				
				
				
				fReaderThread.interrupt();
			}
			if (fReader != null) {
				fReader.close();
				fReader= null;
			}
		} catch(IOException e) {
			if (fDebugMode)
				e.printStackTrace();
		}
		
		try {
			if (fClientSocket != null) {