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From "Nellya Udovichenko (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1259) NoClassDefFoundError while working with MX4J loggers
Date Tue, 22 Aug 2006 13:37:13 GMT
NoClassDefFoundError while working with MX4J loggers 

                 Key: HARMONY-1259
                 URL: http://issues.apache.org/jira/browse/HARMONY-1259
             Project: Harmony
          Issue Type: Bug
          Components: App-Oriented Bug Reports
            Reporter: Nellya Udovichenko
            Priority: Minor

MX4J has the logging system that allows redirecting the log calls to Commons Logging or Log4J
systems and mx4j.jar file is included to the bootclasspath.
However, there are no jar files of Commons Logging (commons-logging.jar) and Log4J (log4j.jar)
projects in Harmony bootclasspath.
Therefore, NoClassDefFoundError occurs while using MX4J logging system. This problem appears
during Geronimo launching with Harmony.

Below is the localized test case for easy bug reproducing:
import java.lang.reflect.Method;
import java.util.ArrayList;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;

public class MX4JLoggerTest {

	public static void main(String[] args) {

		try {

			Class cl = Class.forName("mx4j.log.Log");
			Class clParam = Class.forName("mx4j.log.Logger");
			Method method = cl.getDeclaredMethod("redirectTo", new Class[] {clParam});
			clParam = Class.forName("mx4j.log.CommonsLogger");
			method.invoke(null, new Object[] {clParam.newInstance()});
		} catch (ClassNotFoundException e) {
			System.out.println("MX4J classes aren't found in JDK");
		} catch (Exception e) {
			System.out.println("Exception: it can't force MX4J to use commons.logging classes");

		try {
			ArrayList servers = MBeanServerFactory.findMBeanServer("test");
		} catch (NoClassDefFoundError e) {
			System.out.println("FAILED with exception:");
		} catch (Exception e) {
			System.out.println("PASSED with exception");

Test output.

Harmony with commons-logging.jar added to classpath (not bootclasspath):

C:\>java -cp C:\commons-logger.jar; MX4JLoggerTest
FAILED with exception:
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
        at mx4j.log.Log.createLogger(Log.java:211)
        at mx4j.log.Log.getLogger(Log.java:180)
        at javax.management.MBeanServerFactory.getLogger(MBeanServerFactory.java:34)
        at javax.management.MBeanServerFactory.findMBeanServer(MBeanServerFactory.java:105)
        at MX4JLoggerTest.main(MX4JloggerTest.java:24)

Harmony with commons-logging.jar added to bootclasspath:

C:\>java MX4JLoggerTest
PASSED with exception

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