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java.lang.IllegalArgumentException: null source	at java.util.EventObject.(Unknown Source)	at javax.cache.event.CacheEntryEvent.(CacheEntryEvent.java:26)	at net.sf.ehcache.jcache.JCacheEntryEventAdapter.(JCacheEntryEventAdapter.java:38)	at net.sf.ehcache.jcache.JCacheListenerAdapter.notifyElementPut(JCacheListenerAdapter.java:121)	at net.sf.ehcache.event.RegisteredEventListeners.notifyListener(RegisteredEventListeners.java:294)	at net.sf.ehcache.event.RegisteredEventListeners.invokeListener(RegisteredEventListeners.java:284)	at net.sf.ehcache.event.RegisteredEventListeners.internalNotifyElementPut(RegisteredEventListeners.java:144)	at net.sf.ehcache.event.RegisteredEventListeners.notifyElementPut(RegisteredEventListeners.java:122)	at net.sf.ehcache.Cache.notifyPutInternalListeners(Cache.java:1485)	at net.sf.ehcache.Cache.putInternal(Cache.java:1460)	at net.sf.ehcache.Cache.put(Cache.java:1387)	at net.sf.ehcache.Cache.put(Cache.java:1352)	at net.sf.ehcache.constructs.EhcacheDecoratorAdapter.put(EhcacheDecoratorAdapter.java:119)	at net.sf.ehcache.jcache.JCacheEhcacheDecorator.put(JCacheEhcacheDecorator.java:84)	at net.sf.ehcache.jcache.JCache.put(JCache.java:245)	at com.tibco.events.other.TestCacheEvents.testEvents(TestCacheEvents.java:28)	at com.tibco.events.other.TestCacheEvents.(TestCacheEvents.java:19)	at com.tibco.events.other.TestCacheEvents.main(TestCacheEvents.java:31)