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HELP with java.lang.NullPointerException on doFilter  RSS feed

 
gaston e lopez
Greenhorn
Posts: 3
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HI, I need some helo with this. I cant resolve.

I have the next error: javax.servlet.ServletException: java.lang.NullPointerException inside a method doFilter.
I dont know what else to do... I cant find the error.

org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:508)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:415)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446)
javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:333)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
negocio.DAO.Hibernation.doFilter(Hibernation.java:126)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:313)
org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:291)
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:666)
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:597)
com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:872)
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(PortUnificationPipeline.java:382)
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:264)
com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
 
Paul Clapham
Sheriff
Posts: 22374
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It looks to me like the answer is going to involve Struts, so since there's an identical copy of this post in the Struts forum, I'm locking this one.
 
It is sorta covered in the JavaRanch Style Guide.
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