Apache's Ant

martian · 03-08-2006, 03:54 PM

I just tried installing ant, and when I run it I get this error message.

Code:

Exception in thread "main" java.lang.NoClassDefFoundError: org.apache.tools.ant.launch.Launcher
   at gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.5.0.0)
   at _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_RunMain(java.lang.Class, byte const, int, byte const, boolean) (/usr/lib/libgcj.so.5.0.0)
   at __gcj_personality_v0 (/usr/lib/jvm/java.version=1.4.2)
   at __libc_start_main (/lib/tls/libc-2.3.4.so)
   at _Jv_RegisterClasses (/usr/lib/jvm/java.version=1.4.2)

I've set up my environment as specified in the manual (http://ant.apache.org/manual/install.html#installing).

Thanks.
Chris

tomdkat · 03-08-2006, 04:49 PM

Maybe you need to set CLASSPATH to the location of a jar with the missing class? Just a guess...

Peace...

martian · 03-09-2006, 02:26 PM

How do I do that?

martian · 03-09-2006, 03:16 PM

I upgraded Java to version 1.5, and installed the jaxp_parser_impl RPM, and that has reduced my error message to this:

Code:

# ant
/usr/bin/build-classpath: error: could not find xml-commons-apis Java extension for this JVM
/usr/bin/build-classpath: error: All specified jars were not found
Unknown argument: -cp

When I search for the xml-commons-apis, I find RPMs for Mandriva and Connectiva (on rpmfind.net). I'm guessing I shouldn't use these on a RedHat distribution. Any suggestions on what I should do?

gezmo · 08-14-2007, 07:52 PM

I recently needed to work with ant for work and installed FC7, Java SDK 5 with Update 12.

I did a wget from the jpackage.repos, and did a yum install ant, had encountered similar problems where the ant would complain:

/usr/bin/build-classpath: error: Could not find xml-commons-apis Java extension for this JVM
/usr/bin/build-classpath: error: Some specified jars were not found

I then did a yum install xml-commons-apis

Hopefully this will help your problem martian