<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">

  <!--    Allows App Engine to send multiple requests to one instance in parallel:  -->
  <threadsafe>true</threadsafe>

  <!-- Configure java.util.logging -->
  <system-properties>
    <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
  </system-properties>

  <!-- use the Java 8 runtime -->
  <runtime>java8</runtime>

  <!-- Resource files -->
  <resource-files>
    <include path="WEB-INF/StaticFiles/*" />
  </resource-files> 

</appengine-web-app>

<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">

  <!--    Allows App Engine to send multiple requests to one instance in parallel:  -->
  <threadsafe>true</threadsafe>

  <!-- Configure java.util.logging -->
  <system-properties>
    <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
  </system-properties>

  <!-- use the Java 8 runtime -->
  <runtime>java8</runtime>

  <!-- Resource files -->
  <resource-files>
    <include path="WEB-INF/StaticFiles/*" />
  </resource-files> 
 
  <!-- Fix Unknown Host error when using ROME -->
  <url-stream-handler>urlfetch</url-stream-handler>
  
</appengine-web-app>

Fix annoying UnknownHostException when using ROME
Fix annoying UnknownHostException when using ROME

Apparently this happened when migrating to Java 8.
AbstractPlainSocketImpl.connect
Glad that this bot still works with free GAE account because I was getting worried...