nullpointerexception on request.getHeaderNames method call in websphere

Question

In websphere (version 6 sp11) on request.getHeaderNames method call, i get this exception

java.lang.NullPointerException

            at com.ibm.ws.webcontainer.srt.SRTServletRequest.getHeaderNames(SRTServletRequest.java:345)

            at ....

I dont have source code for SRTServletRequest.

Has anybody faced this problem?

Answer 1

Finally, I have got the answer, thanks everyone for helping me out. the issue was: 1. a developer has saved a request in class field and 2. by the time class level request field is accessed, some other thread started and ended, hence destroy call and nullPointer.