here are some steps you can take
1. Start asking on the tomcat user list, most likely you have some funky
flow in your app, for example, you can't do requestdispatcher.forward if
you've already written data (like JSPs do behind the scenes when you use
them
2. try to work out a reproducible test case
3. with that reproducible test case you can start debugging yourself, OR
you can open a bug https://issues.apache.org/bugzilla/enter_bug.cgi and
attach your test there, and it will be fixed if it is really a bug
Filip
Quintin Beukes wrote:
I figured it might be related to the Nio protocol I did, so I changed
it to "HTTP/1.1". What a surprise!!
It all comes down after the JSP is invoked, so my perception is that
it's related to a bug in the JSP code. Jasper?
Any advice would be greatly appreciated, and I'm willing to fix it
myself if I can get some advice/guidance as this problem is major for
us at the moment. To revert to the old ways will take too long, and
we'll loose a lot of time spent in design for current and future
changes, which are all based around our moving forward from the JSP
templates.
java.lang.NullPointerException
at
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:737)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:349)
at
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:761)
at
org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:127)
at
org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:570)
at org.apache.coyote.Response.doWrite(Response.java:560)
at
org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:325)
at
org.apache.tomcat.util.buf.IntermediateOutputStream.write(C2BConverter.java:242)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:202)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:272)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:276)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:122)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:212)
at org.apache.tomcat.util.buf.WriteConvertor.flush(C2BConverter.java:191)
at org.apache.tomcat.util.buf.C2BConverter.flushBuffer(C2BConverter.java:134)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:439)
at org.apache.catalina.connector.CoyoteWriter.write(CoyoteWriter.java:143)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:119)
at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:326)
at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:342)
at org.apache.jasper.runtime.JspWriterImpl.print(JspWriterImpl.java:468)
at templates.ValuesTag.doEndTag(ValuesTag.java:95)
at
org.apache.jsp.templates.search_jsp._jspx_meth_tmpl_005fvalues_005f0(search_jsp.java:331)
at org.apache.jsp.templates.search_jsp._jspService(search_jsp.java:71)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at templates.JSPTemplate.loadTemplate(JSPTemplate.java:64)
at web.Search.replyBody(Search.java:255)
at web.Search.doGet(Search.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
On Thu, Jul 10, 2008 at 4:23 PM, Quintin Beukes <[EMAIL PROTECTED]> wrote:
Hey,
Can someone please advise me on this one. I am at a total loss as to
what is going on here.
Since we search engine's deployed our output to be a JSP page, random
pages are failing. I would literally refresh the page, and it works
every time, and then suddenly, WAM. Also, not the same error every
time. We are using a custom tag library, but it doesn't fail in here.
For isntance, the following exception is because "context" is null.
Can someone explain to me WHY context would be null?
java.lang.NullPointerException
at org.apache.catalina.connector.Request.setAttribute(Request.java:1424)
at
org.apache.catalina.connector.RequestFacade.setAttribute(RequestFacade.java:503)
at templates.JSPTemplate.loadTemplate(JSPTemplate.java:63)
at web.Search.replyBody(Search.java:255)
at web.Search.doGet(Search.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at
org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:887)
at
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:696)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2009)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Also this. I know that I didn't request the output stream or writer
from the response object. I NEVER do. I only do a
requestDispacter().forward(req,resp) to the JSP apge.
java.lang.IllegalStateException: Cannot forward after response has
been committed
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:302)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
at templates.JSPTemplate.loadTemplate(JSPTemplate.java:64)
at web.Search.replyBody(Search.java:255)
at web.Search.doGet(Search.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at
org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:887)
at
org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:696)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2009)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
--
Quintin Beukes
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