Eclipse livelock(?) at startup with hibernate builder in stacktrace

sh ./jbt420final.sh 
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
org.eclipse.m2e.logback.configuration: The org.eclipse.m2e.logback.configuration bundle was activated before the state location was initialized.  Will retry after the state location is initialized.
org.eclipse.m2e.logback.configuration: Logback config file: /home/eskimo/workspace/420cr2-test1/.metadata/.plugins/org.eclipse.m2e.logback.configuration/logback.1.5.0.20140606-0033.xml
org.eclipse.m2e.logback.configuration: Initializing logback
java.lang.ClassCastException: org.eclipse.osgi.internal.framework.EquinoxConfiguration$1 cannot be cast to java.lang.String
	at org.eclipse.m2e.logback.configuration.LogHelper.logJavaProperties(LogHelper.java:26)
	at org.eclipse.m2e.logback.configuration.LogPlugin.loadConfiguration(LogPlugin.java:189)
	at org.eclipse.m2e.logback.configuration.LogPlugin.configureLogback(LogPlugin.java:144)
	at org.eclipse.m2e.logback.configuration.LogPlugin.access$2(LogPlugin.java:107)
	at org.eclipse.m2e.logback.configuration.LogPlugin$1.run(LogPlugin.java:62)
	at java.util.TimerThread.mainLoop(Timer.java:555)
	at java.util.TimerThread.run(Timer.java:505)
Dec 05, 2014 3:41:58 PM org.hibernate.eclipse.HibernatePlugin start
INFO: HibernatePlugin Started