context.xml
<!-- Tomcat context descriptor used for specifying a custom ClassLoader -->
<Context path="/petclinic" reloadable="false">
<!-- please note that useSystemClassLoaderAsParent is available since Tomcat 5.5.20 / remove if previous versions are being used -->
<!--
<Loader loaderClass="org.springframework.instrument.classloading.tomcat.TomcatInstrumentableClassLoader" useSystemClassLoaderAsParent="false"/>
-->
</Context>