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 domain-dir/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.