in knative-build/runtimes/java/core/java8/proxy/src/main/java/org/apache/openwhisk/runtime/java/action/Proxy.java [49:61]
public Proxy(int port) throws IOException {
long startTime = Debug.start();
Debug.printEnv();
this.server = HttpServer.create(new InetSocketAddress(port), -1);
this.server.createContext("/init", new InitHandler());
this.server.createContext("/run", new RunHandler());
this.server.setExecutor(null); // creates a default executor
// Default is false; used primarily for establishing boot shared class cache
checkMultipleInitEnabled();
Debug.end(startTime);
}