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At times, the build process of Ant is not successful due to the following errors:
Errors in the installation process
Errors in the buildfile
Before installing Ant, you need to ensure that that there is no prior version of Ant installed on the computer. During the installation and configuration process, errors can occur due to various reasons, such as:
Ant JDK/bin not specified in the CLASSPATH environment variable.
The environment variables, ANT_HOME and JAVA_HOME, not specified correctly.
There are any existing versions of crimson.jar or other XML parsers in JRE/ext.
The optional.jar file is not present in ANT_HOME/lib.
The sample chat application consists of five components: JMS, client, server, common, and Channel. The buildfile of each component can contain semantic and syntax errors that may cause the build to fail. You need to check certain conditions, which can cause the build failure:
The targets failure: Targets contain the tasks that perform specific operations after execution. The optional tasks, such as <javacc>, may fail to execute if the libraries on which these tasks depend are absent.
The dependency of targets: The dependency aspect of targets can cause build failure if one of the dependents is missing. If you have set the [component name].dependencies property, you need to specify the dependants.
The Java source code errors: The incorrect Java source code may cause build failure. When the <javac> task compiles the incorrect Java source files, compilation errors occur that cause the build to fail.
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