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Posted to user@struts.apache.org by Sri Sankaran <Sr...@sas.com> on 2002/11/15 20:25:44 UTC
[OT] Tomcat Class loader (Was RE: [OT]Need magic incantation)
Fixed! But I have a following question. But first the fix...
In displaying the classpath used by Tomcat 4.1.12, I noticed that it was loading jre/lib/ext/beaucoup.jar.files. Since I didn't need any of those jar files, I wiped the directory clean. Everything worked...!
While I am pleased that it works, I am puzzled. Why did it not work? I have read the Tomcat classloader page a few times now and don't see an answer.
Sri
-----Original Message-----
From: shakeel.mahate@us.abb.com [mailto:shakeel.mahate@us.abb.com]
Sent: Friday, November 15, 2002 1:36 PM
To: Struts Users Mailing List
Subject: RE: [OT]Need magic incantation
Hi Sri,
Is your class "public"?
-Shakeel
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Please respond to "Struts Users Mailing List"
<st...@jakarta.apache.org>
To: "Struts Users Mailing List" <st...@jakarta.apache.org>
cc: (bcc: Shakeel Mahate/USTRA/ABB)
Subject: RE: [OT]Need magic incantation
Security Level:? Internal
Checked out everything you suggested. Everything's on the up-and-up. The case is right. The package is right. I have even go to the extent of unzipping the jar file in the appropriate classes directory to no avail.
Thanks for the help.
The search continues....what a way to end the week :(
Sri
-----Original Message-----
From: Kevin.Bedell@sunlife.com [mailto:Kevin.Bedell@sunlife.com]
Sent: Friday, November 15, 2002 12:46 PM
To: Struts Users Mailing List
Subject: RE: [OT]Need magic incantation
Gee -
According to the Tomcat site, a webapp looks in all of these places in the order listed:
/WEB-INF/classes of your web application
/WEB-INF/lib/*.jar of your web application
Bootstrap classes of your JVM
System class loader classses (described above) $CATALINA_HOME/common/classes $CATALINA_HOME/common/endorsed/*.jar
$CATALINA_HOME/common/lib/*.jar
$CATALINA_HOME/shared/classes
$CATALINA_HOME/shared/lib/*.jar
Obviously, you've got this covered.
One issue I've noticed with this is case sensitivity. Sometimes if you're using a Windows OS classes can be located even if they have upper case in their directory paths. But when running in an APP server, case sensitivity will keep the class from being found. In your jar file, are there any upper case letters in any of the directory names? It might be worth reviewing the offending jar file structure to make sure there are no issues (though you've probably already done this...).
Not sure - it's probably something obvious because you seem to have the jar file whereit is visible.
Can you see other classes or properties files in that particular jar file?
Silly question - do you have the package and class names correct? Might be worth double checking.
"Sri Sankaran" <Sr...@sas.com> on 11/15/2002 12:04:06 PM
Please respond to "Struts Users Mailing List"
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To: "Struts Users Mailing List" <st...@jakarta.apache.org>
cc: (bcc: Kevin Bedell/Systems/USHO/SunLife)
Subject: RE: [OT]Need magic incantation
Alright.
What I have tried is to place the jar so that it is available to any of the common, shared or the webapp-specific classloaders. In other words, I've placed it in CATALINA_HOME/common/lib re-start & test then placed it in CATALINA_HOME/shared/lib re-start & test....
Sri
-----Original Message-----
From: Kevin.Bedell@sunlife.com [mailto:Kevin.Bedell@sunlife.com]
Sent: Friday, November 15, 2002 11:50 AM
To: Struts Users Mailing List
Subject: Re: [OT]Need magic incantation
Can you re-phrase your question in terms of the classloader diagram at this page?
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/class-loader-howto.html
That is, identify which classloaders your jar file should be visible to (system, shared, webapp, etc.) based on the directories you've put it in?
"Sri Sankaran" <Sr...@sas.com> on 11/15/2002 11:41:40 AM
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To: "Struts-User" <st...@jakarta.apache.org>
cc: (bcc: Kevin Bedell/Systems/USHO/SunLife)
Subject: [OT]Need magic incantation
I'm being stymied by a classpath issue that occurs both on Tomcat 4.1.12 and JRun 3.1.
I get a ClassNotFoundException while the classpath clearly displays the jar file that contains the "missing" class. I've even tried -- in desperation
-- putting the jar file in Tomcat's bin common/lib and server/lib directories to no avail.
The kicker is that I can successfully run a command-line application -- that exercises the same business logic -- using the classpath used by Tomcat.
I know it could be any bunch of things -- but do you have any recommendations?
Sri
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