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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

Solutions on the web

via hivmr.com by Unknown author, 1 year ago
This exception has no message.
via GitHub by artdaw
, 2 years ago
via Stack Overflow by Koen ten Katen
, 4 months ago
via Apache Bugzilla by thomas.eliasson, 1 year ago
via GitHub by GoogleCodeExporter
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at java.util.Hashtable.put(Hashtable.java:396)	at org.apache.naming.resources.DirContextURLStreamHandler.bind(DirContextURLStreamHandler.java:233)	at org.apache.geronimo.tomcat.TomcatWebAppContext.doStart(TomcatWebAppContext.java:453)	at org.apache.geronimo.gbean.runtime.GBeanInstance.createInstance(GBeanInstance.java:981)	at org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStart(GBeanInstanceState.java:267)	at org.apache.geronimo.gbean.runtime.GBeanInstanceState.start(GBeanInstanceState.java:102)	at org.apache.geronimo.gbean.runtime.GBeanInstance.start(GBeanInstance.java:526)	at org.apache.geronimo.gbean.runtime.GBeanDependency.attemptFullStart(GBeanDependency.java:111)