Ant does not build my sources

[Ashish Kundu <ka...@in.ibm.com>]

I am trying to build some java files to a new directory called Try on
AIX using IBM JDK1.2.2. The Ant1.3alpha, that comes with Tomcat 3.2 is
complaining with the following output. Can anybody please share his/her
clue on how to overcome this ? Have alreday included Tools.jar in the
CLASSPATH.

Output :

Buildfile: build.xml
 [property] Error in class org.apache.tools.ant.taskdefs.Property

BUILD FAILED

/data7/tom32/adminPages/build.xml:13:
java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException:
java.lang.NullPointerException
 at org.apache.tools.ant.taskdefs.Property.execute(Property.java:150)
 at java.lang.reflect.Method.invoke(Native Method)
 at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:82)
 at
org.apache.tools.ant.ProjectHelper$TaskHandler.init(ProjectHelper.java:419)

 at
org.apache.tools.ant.ProjectHelper$ProjectHandler.handleProperty(ProjectHelper.java:298)

 at
org.apache.tools.ant.ProjectHelper$ProjectHandler.startElement(ProjectHelper.java:283)

 at com.sun.xml.parser.Parser.maybeElement(Parser.java:1391)
 at com.sun.xml.parser.Parser.content(Parser.java:1499)
 at com.sun.xml.parser.Parser.maybeElement(Parser.java:1400)
 at com.sun.xml.parser.Parser.parseInternal(Parser.java:492)
 at com.sun.xml.parser.Parser.parse(Parser.java:284)
 at javax.xml.parsers.SAXParser.parse(SAXParser.java:155)
 at javax.xml.parsers.SAXParser.parse(SAXParser.java:126)
 at org.apache.tools.ant.ProjectHelper.parse(ProjectHelper.java:104)
 at
org.apache.tools.ant.ProjectHelper.configureProject(ProjectHelper.java:85)

 at org.apache.tools.ant.Main.runBuild(Main.java:403)
 at org.apache.tools.ant.Main.main(Main.java:149)

Total time: 1 second
------------------
Thanks in advance,
Ashish

Re: Ant does not build my sources (Tomcat 3.2)

[Stefan Bodewig <bo...@apache.org>]

Ashish Kundu <ka...@in.ibm.com> wrote:

> The Ant1.3alpha, that comes with Tomcat 3.2 is complaining with the
> following output.

Tomcat 3.2 ships with an alpha version of Ant? Strange.

> java.lang.reflect.InvocationTargetException:
> java.lang.NullPointerException at
> org.apache.tools.ant.taskdefs.Property.execute(Property.java:150) at
> java.lang.reflect.Method.invoke(Native Method) at
> org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:82) at

This is extremely strange as well. Line 150 is a blank line in my
version of Property.java. Which date has the version of Ant been
compiled on?

What's really strange here is that Ant thinks Property would not be a
subclass of Task - this is indicated by the TaskAdapter line above. It
seems as if org.apache.tools.ant.taskdefs.Property and
org.apache.tools.ant.taskdefs.Task have been loaded by different
classloaders.

Is this a stand alone invocation of Ant or are you running Ant inside
another application (like Tomcat)?

Stefan