Printing Stacktrace in error jsp

[rudresh kumar]

Hi all,

Can anyone help me on showing stacktrace in error jsp.

Thanks in advance

[Jeanne Boyarsky]

On the error page, just do:
exception.printStackTrace()

Although this begs the question: what is a user going to do with an exception. Why not write the exception to the error log so it is persisted and you can go back to it after a user complains?

[sudhir nim]

exception.printStackTrace() will print stack trace on console not on jsp page.
If you want to display stack trace on jsp page use following line.

exception.printStackTrace(response.getWriter());

[Stan James]

And you may want to go to a bit more trouble yet to replace newlines with <br> and such. It might be entertaining to write a PrintStream implementation that does that.

[Ben Souther]

Originally posted by Stan James:
And you may want to go to a bit more trouble yet to replace newlines with <br> and such. It might be entertaining to write a PrintStream implementation that does that.

Or wrap the call in a set of <pre></pre> tags.

[Rodrigo Tomita]

I know this is a fairly old thread, but just wanted to share what I could put together from the info presented here. We defined a default error page and put the stack trace "hidden" from the user. In dev/test environments, we can right-click the page and show the source code to see the stack trace.

<blockquote>code:

---

<pre name="code" class="core">
<%@ page isErrorPage="true" import="java.io.*"%>

<div id="stacktrace" style="display:none;">
<pre>
<%
// if there is an exception
if (exception != null) {
// print the stack trace hidden in the HTML source code for debug
exception.printStackTrace(new PrintWriter(out));
}
%>
</pre>
</div>
</pre>

---

</blockquote>