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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.

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via Apache's JIRA Issue Tracker by Antonio Sanso, 1 year ago
This exception has no message.
via Oracle Community by 807593, 1 year ago
This exception has no message.
via Oracle Community by 688154, 1 year ago
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via Oracle Community by 432051, 1 year 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:394)	at org.apache.sling.jcr.resource.internal.JcrResourceListener.sendOsgiEvent(JcrResourceListener.java:298)	at org.apache.sling.jcr.resource.internal.JcrResourceListener.onEvent(JcrResourceListener.java:218)	at org.apache.jackrabbit.oak.plugins.observation.ChangeProcessor$EventGeneratingNodeStateDiff.sendEvents(ChangeProcessor.java:154)	at org.apache.jackrabbit.oak.plugins.observation.ChangeProcessor.run(ChangeProcessor.java:117)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)	at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)