NullPointerException in weblogic.servlet.internal.ChunkOutput

[Alexis de Peufeilhoux]

Hello,

 

I'm retrieving some PDF content from a servlet, everything worked fine but an exception show up in the traces at the point I flush the response PrintWriter of the servlet, which I accessed through a RequestDispatcher.forward(). From what I read in the Servlet 2.3 specifications I have to commit the response before the forward() method ends. Why flush() did not work?

 

I'm using Weblogic 6.1 SP1 on Linux.

 

A. de Peufeilhoux

---

 

EXCEPTION: java.lang.NullPointerException
        at weblogic.servlet.internal.ChunkOutput.clearBuffer(ChunkOutput.java:231)
        at weblogic.servlet.internal.ChunkOutput.flush(ChunkOutput.java:251)
        at weblogic.servlet.internal.ChunkOutputWrapper.flush(ChunkOutputWrapper.java:152)
        at weblogic.servlet.internal.ChunkWriter.flush(ChunkWriter.java:31)
        at java.io.PrintWriter.flush(PrintWriter.java:120)
        at de.nets_ag.channel.DefaultProjectDecorator.decorate(DefaultProjectDecorator.java:95)
        at de.nets_ag.channel.http.html.HtmlNetsProjectDecorator.decorate(HtmlNetsProjectDecorator.java:64)
        at de.nets_ag.channel.http.ChannelBaseServlet.sendServletResponse(ChannelBaseServlet.java:435)
        at de.nets_ag.channel.http.ChannelBaseServlet.defaultProcessRequest(ChannelBaseServlet.java:292)
        at de.nets_ag.channel.http.html.HtmlChannel.processRequest(HtmlChannel.java:89)
        at de.nets_ag.channel.http.ChannelBaseServlet.processRequestMain(ChannelBaseServlet.java:194)
        at de.nets_ag.channel.http.ChannelBaseServlet.doGet(ChannelBaseServlet.java:125)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
        at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:215)
        at de.nets_ag.channel.http.ForwarderServlet.forwardRequest(ForwarderServlet.java:113)
        at de.nets_ag.channel.http.ForwarderServlet.doGet(ForwarderServlet.java:90)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:21)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at de.nets_ag.channel.http.authentication.SetUserIdFilter.doWeblogicFilter(SetUserIdFilter.java:151)
        at de.nets_ag.channel.http.authentication.SetUserIdFilter.doFilter(SetUserIdFilter.java:110)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
        at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2464)
        at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2039)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
 
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