Why is Jetty hanging when I try to start it in debug mode?

问题

My problem is that when I try to launch Start.java in debug mode, Jetty hangs. Here is my Start.java file, taken from the Wicket quickstart page

Server server = new Server();
SocketConnector connector = new SocketConnector();

// Set some timeout options to make debugging easier.
connector.setMaxIdleTime(1000 * 60 * 60);
.....
try {
    System.out.println(">>> STARTING EMBEDDED JETTY SERVER, PRESS ANY KEY TO STOP");
    server.start();
    System.in.read();
    System.out.println(">>> STOPPING EMBEDDED JETTY SERVER");
    // while (System.in.available() == 0) {
    //   Thread.sleep(5000);
    // }
    server.stop();
    server.join();
} catch (Exception e) {
.....
}

When I try to reach http://localhost:8080, I get:

HTTP ERROR: 503

Problem accessing / Reason:

SERVICE_UNAVAILABLE

There are no error logs. What's wrong, and how do I fix it?

回答1:

I had the same problem, Wicket hung on startup. After activating the debug log in log4j, I found out it hangs while generating or read a random from the underlying OS.

Try this: http://docs.codehaus.org/display/JETTY/Connectors+slow+to+startup

回答2:

The problem probably caused by your IDEA debugging options. At the breakpoints section for each breakpoint there is a suspend all / thread option. If you have stopped at a breakpoint which suspended all threads Jetty will not answer requests (since it has been suspended). Change the breakpoint to "thread".

来源：https://stackoverflow.com/questions/4601745/why-is-jetty-hanging-when-i-try-to-start-it-in-debug-mode