Ant build error

[Neo Wills]

Hi,

I tried building the 6.0.x tomcat source. From the installation looks like we had to execute "ant download" and then "ant".

Executing "ant download" completed fine. But executing "ant" after it fails with this error:

Any idea if some envt variable is messed up ? The JAVA_HOME path is pointing right at the jdk directory - /usr/lib/jvm/java-6-openjdk/.

sudo ant
Buildfile: build.xml

build-prepare:
   [delete] Deleting directory /usr/share/tomcat-trunk/output/build/temp
    [mkdir] Created dir: /usr/share/tomcat-trunk/output/build/temp

compile:
    [javac] Compiling 1058 source files to /usr/share/tomcat-trunk/output/classes

BUILD FAILED
java.lang.NoClassDefFoundError: gnu/classpath/Configuration
        at com.sun.tools.javac.Main.<clinit>(Main.java:66)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:186)
        at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.doesModernCompilerExist(CompilerAdapterFactory.java:145)
        at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:100)
        at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1058)
        at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:882)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.ClassNotFoundException: gnu.classpath.Configuration
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)
        ... 23 more

Total time: 1 second

Neo.

[Tim Holloway]

Try using the Sun JDK instead. The open-source versions of Java were not complete implementations, and I'm not sure that even the latest versions of them are complete.

[Peter Johnson]

Are you sure JAVA_HOME is set to openjdk? I ask because the missing class appears to be from the gnu implementation of the JVM, which as Tim points out is not complete. So my guess is that it is not openjdk but rather the gnu version of the JVM that is running. Try adding the -v option to the ant command line, it will print out, among other things, the JDK it is using:

ant -v