Error while building Hadoop 0.20 source code using Ant

StackOverflow https://stackoverflow.com/questions/23380539

  •  12-07-2023
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Question

I am compiling hadoop 0.20.0 source code to create its binary distribution(hadoop-0.20.0.tar.gz). Ant is used to compile and package this source code.I installed ANT, Apache forrest and libtool.

  • After this i applied command "ant compile" --Compiled succesfully
  • when i applied command ant package -Djava5.home=$JAVA_HOME -Dforrest.home=$FORREST_HOME. I am getting following error.(Both JAVA_HOME and FORREST_HOME is set properly): Build Failed

Please help me out:

Was it helpful?

Solution

It looks like you encountered a bug that existed only in Ant 1.9.3:

Bugzilla Report 55949: NPE in javadoc when using a custom doclet

You have several options:

  • Upgrade to a newer version of Ant, such as Ant 1.9.4.
  • Downgrade to an older version of Ant, such as Ant 1.9.2.
  • Edit the build.xml file in the hadoop 0.20.0 source code.

If you go with the "Edit the build.xml" option, open the file in a text editor and change line 981 from...

<javadoc>

...to...

<javadoc postProcessGeneratedJavadocs="false">
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