Had to restart server this morning. Startup is halted with the following error. HELP!!!

java.lang.ClassNotFoundException: org.apache.log4j.NullAppender
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at org.apache.log4j.helpers.Loader.loadClass(Loader.java:198-)
	at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:327)
	at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:124)
	at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:785)
	at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768-)
	at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:672)
	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:516)
	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:395)
	at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:403)
	at com.bas.basserver.persistence.log.C.<init>(Unknown Source)
	at com.bas.basserver.persistence.PersistenceManager.initialise(Unknown Source)
	at com.bas.basserver.bsmanager.E.A(Unknown Source)
	at com.bas.newcp.ServerStarterECP.L(Unknown Source)
	at com.bas.newcp.ServerStarterECP.main(Unknown Source)
log4j:ERROR Could not instantiate appender named "A_BGND".
Initialising LDAP Persister
LDAP SEARCH LIMIT value is null

OK - All's well. It stopped on the last line in the above log - like .... forever!! but then eventually restarted again. Never done that before. Time for a faster server methinks

2 years later