Solution

Set the JSP compilation switch fork to false.

This can be done either of two ways:

• Globally, by setting the fork init parameter of the JspServlet in ${S1AS_HOME}/domains/domain1/config/default-web.xml to false:

  <servlet\> <servlet-name\>jsp</servlet-name\> <servlet-class\>org.apache.
  jasper.servlet.JspServlet</servlet-class\> .... <init-param\> <param-name\>
  fork</param-name\> <param-value\>false</param-value\> </init-param\> .... 
  </servlet\>

• On a per-web application basis, by setting the fork JSP configuration property in sun-web.xml to false:

  <sun-web-app\> <jsp-config\> <property name="fork" value="false" /\> 
  </jsp-config\> </sun-web-app\>

Either setting will prevent ant from spawning a new process for javac compilation.