java.lang.InstantiationException: xx.xx.xx.SessionTrackingListener

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This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

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via Stack Overflow by Jugu
, 1 year ago
java.lang.InstantiationException: xx.xx.xx.SessionTrackingListener
at java.lang.Class.newInstance(Class.java:427)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:125)

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