"key cant be null " during invocation of Web service - Programmers Heaven

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"key cant be null " during invocation of Web service


I am getting the following exception while invoking a webservice deployed on WAS (Websphere application server) from an application in JBOSS.

javax.xml.ws.soap.SOAPFaultException: java.lang.NullPointerException: key can't be null
12:06:36,371 ERROR [STDERR] at org.jboss.ws.core.jaxws.SOAPFaultHelperJAXWS.getSOAPFaultException(SOAPFaultHelperJAXWS.java:72)
12:06:36,371 ERROR [STDERR] at org.jboss.ws.core.jaxws.binding.SOAP11BindingJAXWS.throwFaultException(SOAP11BindingJAXWS.java:109)

The issue is intermittent and not all the requests are giving problem.

Please help me to solve this issue.

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