--- build.xml.orig	2017-08-26 18:47:06.000000000 -0700
+++ build.xml	2017-08-26 18:48:23.000000000 -0700
@@ -158,6 +158,7 @@
 
     <!-- Compile internal server components -->
     <javac srcdir="java" destdir="${tomcat.classes}"
+           fork="true" memoryinitialsize="256m" memorymaximumsize="512m"
            debug="${compile.debug}"
            deprecation="${compile.deprecation}"
            source="${compile.source}"
@@ -574,6 +575,7 @@
 
     <!-- Build classes for examples webapp -->
     <javac   srcdir="webapps/examples/WEB-INF/classes"
+             fork="true" memoryinitialsize="256m" memorymaximumsize="512m"
              destdir="${tomcat.build}/webapps/examples/WEB-INF/classes"
              debug="${compile.debug}" deprecation="${compile.deprecation}"
              source="${compile.source}"
@@ -584,6 +586,7 @@
     </javac>
 
     <javac   srcdir="webapps/examples/jsp/plugin/applet"
+             fork="true" memoryinitialsize="256m" memorymaximumsize="512m"
              destdir="${tomcat.build}/webapps/examples/jsp/plugin/applet"
              debug="${compile.debug}" deprecation="${compile.deprecation}"
              source="${compile.source}"
@@ -1065,6 +1068,7 @@
     </move>
     <mkdir dir="${tomcat-dbcp.home}/classes"/>
     <javac destdir="${tomcat-dbcp.home}/classes"
+           fork="true" memoryinitialsize="256m" memorymaximumsize="512m"
            debug="${compile.debug}"
            deprecation="${compile.deprecation}"
            source="${compile.source}"