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sethuraman sukumaran
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How many instances of the listener class will be created by the container.

In other words are the instance variables defined in the listener class thread safe ?

There is a listener class which implements HttpSessionListener. Will there be as many instances of the listener as the number of sessions ?
 
Ner min
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in a single JVM enviroment only one.
anything else wouldnt make sence couse o wouldnt even be able to say how many sessions r online/created. If u dont tuch the propertys by youre self should be thread safe.

on multi JVM enviroment i m not sure
 
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