Launching JBoss 7.0 Runtime Server from Eclipse. Web app deployed on server.  Getting following error message on JBoss startup:

Exception in thread "main" java.lang.ExceptionInInitializerError
at org.jboss.logmanager.LoggerNode.<init>(LoggerNode.java:104)
at org.jboss.logmanager.LogContext.<init>(LogContext.java:47)
at org.jboss.logmanager.LogContext.<clinit>(LogContext.java:41)
at org.jboss.logmanager.LogManager$1.run(LogManager.java:104)
at org.jboss.logmanager.LogManager$1.run(LogManager.java:51)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.logmanager.LogManager.<init>(LogManager.java:51)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at      sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:498)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at java.util.logging.LogManager$1.run(LogManager.java:167)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.logging.LogManager.<clinit>(LogManager.java:156)
at org.jboss.modules.Main.main(Main.java:275)
Caused by: java.lang.NullPointerException
at java.util.logging.Logger.getLogger(Logger.java:229)
at java.util.logging.Logger.<clinit>(Logger.java:181)
... 17 more
Exception in thread "Thread-1" java.lang.NoClassDefFoundError: Could not initialize class java.util.logging.LogManager
at java.util.logging.LogManager$Cleaner.run(LogManager.java:199)

Anyone know how to resolve this problem?