Struts 1.1 requires it (should solve your problem of "ActionServlet
failing to load", though I admint I've never seen that exact
manifestation of the problem before so I could be wrong). I suggest a
value of 1, but it really depends on your application. Are there any
other Servlets in your application that you need to initialize first?
Erik
Daffin, Miles (Company IT) wrote:
Should I have done? What is the expected result?
1) If no such param is specified.
2) If the param is specified.
And what value would you recommend?
Thanks.
Miles
-----Original Message-----
From: Erik Weber [mailto:[EMAIL PROTECTED]
Sent: 12 November 2004 16:28
To: Struts Users Mailing List
Subject: Re: STRUTS Application still appears viable even
though ActionServlet has failed to initialize.
Have you specified the load-on-startup attribute for the
controller Servlet in web.xml?
Erik
Daffin, Miles (Company IT) wrote:
Hi,
Can anyone tell me if this is a bug?
I have a struts 1.1 app with a typical default index.jsp
redirecting to
the entry point action:
<logic:redirect forward="/startForm3"/>
This was failing to because of the following NPE:
---
java.lang.NullPointerException
at
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:521)
at
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:436)
at
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:396)
at
org.apache.struts.taglib.logic.RedirectTag.doEndTag(RedirectT
ag.java:29
4
)
---
I can see from a quick google that this is a frequently experienced
problem and yet I have not seen a satisfactory solution.
If we look into the RequestUtils code we find that the
problem is that
the ModuleConfig cannot be found on either the request or in the
application context. When the forward config for the string
in the jsp
is looked up we therfore get the NPE.
If we look into the container logs we find the root cause: the
ActionServlet failed to load:
---
javax.servlet.ServletException: Error instantiating servlet class
org.apache.struts.action.ActionServlet
at
org.apache.catalina.core.StandardWrapper.loadServlet(Standard
Wrapper.ja
v
a:986)
...
----- Root Cause -----
java.lang.NoClassDefFoundError: javax/sql/DataSource at
java.lang.ClassLoader.defineClass0(Native Method)
---
One assumes that the ActionServlet did not load the
ModuleConfig, and
that the application is *not* therefore really viable - although it
seems to think it is...
So. My question is: is this a struts bug? Should the application be
attempting to service requests if its central component
failed to boot
correctly?
The side effects this causes are hard to diagnose and I
suggest that it
would be better if, in situations like this, all further
requests were
responded to with an Error 500 and the stacktrace for the original
problem.
My apologies if this is one of a thousand emails on the same
subject. I
searched the archive prior to writing this.
-Miles
Miles Daffin
Morgan Stanley
20 Cabot Square | Canary Wharf | London E14 4QA | UK
Tel: +44 (0) 20 767 75119
[EMAIL PROTECTED]
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