I have two very simple apps listening on TCP HTTP 4466. Both use Jersey 2.X but one is a native-image and the other is a java UncompiledMain.java process (I'm trying to migrate to java native images instead of JIT compilation):
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
1) java 71457 sarnobat 73u IPv6 0x5e313f1de8147dd9 0t0 TCP *:4466 (LISTEN)
2) app 71552 sarnobat 5u IPv6 0x5e313f1db096eb79 0t0 TCP localhost:4466 (LISTEN)
I'm using different runtime bindings for each (see details).
I know in more recent Linux kernel versions multiple listeners can bind to the same port but I don't know if that's related (besides, I'm using Mac OS X 10.15.7).
Can anyone suggest what I can do to understand why this is? Ultimately I wish to solve the problem so only one program handles all requests but I think I don't understand well enough some network basics.
Details
Sorry the code is messy - I was hoping to get it working before cleaning it up!
Server 1 (via JVM) - org.glassfish.jersey.jdkhttp.JdkHttpServerFactory
Responds to network requests (through an ssh tunnel).
JdkHttpServerFactory.createHttpServer(new URI("http://localhost:" + args[0] + "/"),
new ResourceConfig(MyResource.class));
...
@javax.ws.rs.Path("")
public static class MyResource { // Must be public
@GET
@javax.ws.rs.Path("")
@Produces("application/json")
public Response list(@QueryParam("value") String iValue)
throws JSONException, IOException {
System.err.println("list()");
System.out.println(iValue);
return Response.ok().header("Access-Control-Allow-Origin", "*").type("application/json").build();
}
Server 2 (native image) - org.glassfish.grizzly.http.server.HttpServer
Responds to local requests but not over network.
private static final URI BASE_URI = URI.create("http://localhost:4466/");
public static final String ROOT_PATH = "";
public static void main(String[] args) {
try {
System.out.println("\"Hello World\" Jersey Example App");
final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(BASE_URI, create(), true);
Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
@Override
public void run() {
server.shutdownNow();
}
}));
server.start();
...
public static ResourceConfig create() {
final Resource.Builder resourceBuilder = Resource.builder(ROOT_PATH);
resourceBuilder.addMethod("GET").handledBy(new Inflector<ContainerRequestContext, Response>() {
@Override
public Response apply(ContainerRequestContext data) {
String iValue = data.getUriInfo().getQueryParameters().getFirst("value");
System.err.println("list()");
System.out.println(iValue);
getMethodCalled = true;
return Response.ok().header("Access-Control-Allow-Origin", "*").type("application/json").build();
}
});
