Hudson seems to deploy the product with not jar but pom when the description of
maven-plugin is specified to pom of the project. However, it might be a problem
of occurring for maven-plugin that adds a special operation from no occurrence
of the problem in maven-compiler-plugin, and the occurrence of the problem such
as maven-install-plugin and javacc-maven-plugin to phase.

対象となるプロジェクトのpomにmaven-pluginの記述が指定してあるとhudsonが成果物を
jarではなくpomでデプロイしてしまうようです。ただmaven-compiler-pluginでは問題が
起きず、maven-install-plugin、javacc-maven-plugin等で問題が起きることからphaseに
特殊な操作を加えるmaven-pluginの場合に起きる問題かもしれません。