I compile my Swing program with some third party jar files successfully but running it has the following error in Eclipse 3.3.2, JDK 6 & Windows XP.
However, running my Swing program as a Java web start program on the command line is ok:
javaws http://localhost:7001/webstart/myapp/launch.jnlp

I do not use any log statement in my program.
I cannot modfiy the third party jar files.
Please help.

Exception in thread "main" java.lang.ExceptionInInitializerError
at com.mycom.myprod.proj.client.swing.MyApp.main(MyAp p.java:121)
Caused by: org.apache.commons.logging.LogConfigurationExcepti on: java.lang.SecurityException: class "org.apache.commons.logging.Log"'s signer information does not match signer information of other classes in the same package (Caused by java.lang.SecurityException: class "org.apache.commons.logging.Log"'s signer information does not match signer information of other classes in the same package)
at org.apache.commons.logging.LogFactory$2.run(LogFac tory.java:579)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.commons.logging.LogFactory.newFactory(L ogFactory.java:517)
at org.apache.commons.logging.LogFactory.getFactory(L ogFactory.java:308)
at com.mycom.myprod.proj2.swing.logging.LogFactoryHel per.getFactory(LogFactoryHelper.java:88)
at com.mycom.myprod.proj2.swing.logging.LogFactoryHel per.getFactory(LogFactoryHelper.java:61)
at com.mycom.myprod.proj2.swing.DesktopContext.<clini t>(DesktopContext.java:287)
... 1 more
Caused by: java.lang.SecurityException: class "org.apache.commons.logging.Log"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(ClassLoader.java: 775)
at java.lang.ClassLoader.preDefineClass(ClassLoader.j ava:487)
at java.lang.ClassLoader.defineClass(ClassLoader.java :614)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:260)
at java.net.URLClassLoader.access$000(URLClassLoader. java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 06)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 51)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:319)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Cla ss.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.commons.logging.LogFactory$2.run(LogFac tory.java:531)
... 7 more