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HttpServletRequest.getSession producing Null Pointer

843840Dec 9 2002 — edited Jan 14 2003

Hi Guys,

I am running an Applet - Servlet system using serialisation for communication using tomcat 3.3 and swing. In one of my servlets, I start a second thread for the purpose of running a batch process, whilst still returning status information to the client.

My problem is that if I try to access HttpServletRequest.getSession() from within the new thread, I get the following exception:

java.lang.NullPointerException
at org.apache.tomcat.core.RequestImpl.getSession(RequestImpl.java:497)
at org.apache.tomcat.facade.HttpServletRequestFacade.getSession(HttpServletRequestFacade.java:382)

It seems that basically you cannot access session information from threads spawned within servlets.

Has anyone had any trouble like this?

Thanks in advance.

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Locked on Feb 11 2003

Added on Dec 9 2002

#java-servlet

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