IOException in writing to response.getWriter()

[Sharad Agarwal]

Relevant snip of code is:

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
// ... Lots of other code
StringBuffer completeDoc= new StringBuffer();
// ... Code to populate completeDoc
PrintWriter out = response.getWriter();
out.print(completeDoc);
out.close();
}

Relevant snip of stack trace is:
Servlet failed with Exception
java.lang.RuntimeException: IOException occured
at weblogic.servlet.internal.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:178)
at weblogic.servlet.internal.WLOutputStreamWriter.write(WLOutputStreamWriter.java:99)
at weblogic.servlet.internal.WLOutputStreamWriter.write(WLOutputStreamWriter.java:111)
at java.io.PrintWriter.write(PrintWriter.java:208)
at java.io.PrintWriter.write(PrintWriter.java:224)
at java.io.PrintWriter.print(PrintWriter.java:369)
at com.myCode.servlet.myServlet.doGet(myServlet.java:282)
Line 282 in myServlet is the one above: out.print(completeDoc);
Now this happens once in ~1000 accesses to this servlet. While I will be adding code to catch the IOException and print details, I was hoping if someone could point me towards possible issues. Also, perhaps it might be more correct to convert this statement to: out.print(completeDoc.toString());

[Sai Prasad]

I don't know why but I like to know the reason too.

[sameerleekha]

Hi,
Try to set the content type before getting the writer object.
response.setContentType("text/html")

[Sharad Agarwal]

Hi All (especially Sai Prasad),
Sorry for the late response. This had been put on the back burner for quite some time. We found out the issue. This Exception is logged by Weblogic whenever the end customer hits 'escape' or 'stop' in the browser before the page is loaded. I guess the connection gets terminated and consequently the servlet throws an IOException. Note that this is WL5.1, this might have been 'fixed' in later versions.
Hope this helps,
Sharad Agarwal

[Chris Mathews]

Originally posted by Sharad Agarwal:
Hi All (especially Sai Prasad),
Sorry for the late response. This had been put on the back burner for quite some time. We found out the issue. This Exception is logged by Weblogic whenever the end customer hits 'escape' or 'stop' in the browser before the page is loaded. I guess the connection gets terminated and consequently the servlet throws an IOException. Note that this is WL5.1, this might have been 'fixed' in later versions.
Hope this helps,
Sharad Agarwal

I remember this problem from WLS 4.x, however I didn't put the two together when you originally posted. Regardless, this problem has been fixed in WLS 6.x and greater.