The JSP page is accessed but fails to compile, and the server log contains the error message "Unable to execute command" with the following stack trace:
at org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher. exec(Execute.java:655) at org.apache.tools.ant.taskdefs.Execute. launch(Execute.java:416) at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:427) at org.apache.tools.ant.taskdefs.compilers.DefaultCompilerAdapter. executeExternalCompile(DefaultCompilerAdapter.java:448) at org.apache.tools.ant.taskdefs.compilers.JavacExternal.execute (JavacExternal.java:81) at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:842) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:682) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:396)
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.