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From Leonard Gestrin <Leonard.Gest...@markettools.com>
Subject request.getSession() generates IllegalStateException in top filter (appears, response not being recycled properly if SocketException happened for it in the past)
Date Thu, 16 Apr 2009 05:39:06 GMT
Hello,

This is my first post on the list and I've been using tomcat for few years, so I want to start
off stating that it is an excellent product.

However, I've ran into an issue, which I am not sure what to do about.

We have jsp that displays multiple images, which is being written directly to the page by
the servlet.

<img src="/chart/DrawTestChart>

Every once in while, in the servlet,  while writing the bytes out, I get " ClientAbortException:
 java.net.SocketException: Connection reset by peer"

At this point, I catch an exception and in finally block, I am trying to close response.outputstream.

After a while, the same response object is being used by tomcat again, but as it gets to a
first filter, I can see that it's already in commited state (response.isCommitted()==true)

I know it's the same response object for which SocketException was generated, because I am
printing response.hashcode() in chart servlet and in Filter

This really sucks, because anything I try to do with such response is doomed to fail :)

So, please advise how can I work around this issue, short of writing image in temp directory
of tomcat as oppose to directly to response output stream.

This is tomcat apache-tomcat-5.5.20, JRE 15, WinXP.

I can provide code snippets, if it would be helpful. (chart servlet is using jdk classes
java.awt.image.BufferedImage to create image
javax.imageio.ImageWriter that is wrapped on top of response.outputstream)

Thanks

Leonard







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