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Posted to dev@tomcat.apache.org by bu...@apache.org on 2011/07/18 11:32:17 UTC
DO NOT REPLY [Bug 51523] New: ClassNotFoundException when loading
TLD listeners
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Bug #: 51523
Summary: ClassNotFoundException when loading TLD listeners
Product: Tomcat 7
Version: unspecified
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: alonso.domin@gmail.com
Classification: Unclassified
Created attachment 27296
--> https://issues.apache.org/bugzilla/attachment.cgi?id=27296
Localhost log file
Tomcat 7 fails to find listener class defined in TLD.
Tag library is packaged inside folder "META-INF" of one the libraries deployed
with the webapp. Tomcat seems to read perfectly the tag library definition but
throws a "ClassNotFoundException" when trying to invoke the listener class,
which exists and it's contained in same jar file as the tag library definition.
Same application starts up perfectly with Tomcat 6.x.
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Alonso <al...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|WORKSFORME |
--- Comment #2 from Alonso <al...@gmail.com> 2011-07-19 13:54:41 UTC ---
I should be more specific in my previous post. As you can see at logfile the
exception message is:
java.lang.ClassNotFoundException:
net.sf.jasperreports.jsf.config.ConfigurationStartupListener
and the listener definition in TLD is as follows:
<listener>
<listener-class>
net.sf.jasperreports.jsf.config.ConfigurationStartupListener
</listener-class>
</listener>
So, Tomcat 7 is not trimming blanks at the string which has been read from the
TLD file. I think it should be considered as a bug no matter how stricter
Tomcat 7 had become validating the TLD file, since TLD is still valid with or
without those blanks.
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
--- Comment #5 from Mark Thomas <ma...@apache.org> 2011-07-19 15:49:55 UTC ---
Hmm. I still can't reproduce this even with that library.
Trying with 7.0.16 rather than trunk...
That reproduced it. Very odd. I don't recall any changes since 7.0.16 that
fixed this. Trying with 7.0.19. That also reproduces it... Even stranger. The
changes between 7.0.19 and trunk are minimal and seem unrelated to this. Still
digging...
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |WORKSFORME
--- Comment #1 from Mark Thomas <ma...@apache.org> 2011-07-19 13:47:15 UTC ---
This works for me with a simple test case and I'd be surprised if the TCKs
didn't cover this as well (although I haven't checked).
This is most likely a configuration error, possibly an issue with the TLD
and/.or web.xml since Tomcat 7 is stricter about validating these.
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |INVALID
--- Comment #6 from Mark Thomas <ma...@apache.org> 2011-07-19 17:00:09 UTC ---
Tracked it down.
The TLD provided by the JAR you are using is invalid. If you follow the
definitions in the XSDs you'll eventually see that leading and trailing
whitespace should not be present.
Since this is an invalid TLD Tomcat will not be adding a work-around for this.
Tomcat very rarely adds workarounds for bugs in third-party
applications/libraries.
The reason I wasn't seeing it is that I always run Tomcat with
-Dorg.apache.catalina.STRICT_SERVLET_COMPLIANCE="true"
Amongst other things, this configures the XML parsers to use the slower but
specification compliant settings of validation=true and namespaceAware=true.
With these settings the parsers remove leading and trailing whitespace.
One work-around that is available to you is to enable STRICT_SERVLET_COMPLIANCE
or configure appropriate XML validation for the specific context. Help with
either of those options is available on the users mailing list.
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution| |WORKSFORME
--- Comment #3 from Mark Thomas <ma...@apache.org> 2011-07-19 14:12:24 UTC ---
This works for me with the blanks present as well.
This still looks like a configuration error and the users list is the place to
get help.
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DO NOT REPLY [Bug 51523] ClassNotFoundException when loading TLD
listeners
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51523
Alonso <al...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|WORKSFORME |
--- Comment #4 from Alonso <al...@gmail.com> 2011-07-19 14:29:12 UTC ---
Sorry for being so pedant, but I'm not asking for help, I'm reporting a bug
because if I modify the TLD inside the jar file (removing blanks), repack it
and deploy the same webapp with the modified jar, then the application is
started up without problems. I didn't posted previously whithout check that
first.
Please, review the code at the component which loads TLD files since I'm pretty
sure that it is not trimming blanks a that string.
I'm using Tomcat 7.0.16 and this library:
https://sourceforge.net/projects/jasperreportjsf/
Kind regards.
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