1 Reply Latest reply: Jan 29, 2013 3:19 PM by oajamfibia RSS

    SingleInstanceService does not work.

    oajamfibia
      Hi
      I have a javafx application started from web start via a link on a webpage. The SingleInstanceService works fine when I have a running instance and try to open another one. But when no instances are running, and I either double click a link on my webpage or a desktop link, two instances are started.

      Windows 7, Java 7 u11

      In the log files, I can see, that the two instances are started within less than 100 milliseconds. This is some of the console output from the instance that came last:

      ...................
      2013-01-29 14:03:17,246 [thread App-1] DEBUG App - SingleInstanceService found !
      server running at port: 61065
      temp: connect to: http://www.test.net/App.jnlp 61065
      network: Connecting socket://127.0.0.1:61065 with proxy=DIRECT
      temp: no server is running - continue launch!
      basic: unique id: http://www.test.net//App.jnlp
      basic: server port at: 61109
      basic: getSingleInstanceFilename: C:\Users\me\AppData\LocalLow\Sun\Java\Deployment\tmp\si\http___www.test.net_App.jnlp-x86_61109
      basic: file should be removed: C:\Users\me\AppData\LocalLow\Sun\Java\Deployment\tmp\si\http___www.test.net_App.jnlp-x86_61065
      ....................

      , as you can see, web start actually finds the marker file of the first instance, but just removes it.

      Is this a bug ? How can I fix it ?
        • 1. Re: SingleInstanceService does not work.
          oajamfibia
          Hi

          I could see, that the Java Control Panel also uses this technique. It also places a Single Instance File in C:\Users\me\AppData\LocalLow\Sun\Java\Deployment\tmp\si

          When I place a shortcut to the JCP on the desktop, I can launch 2 instances if I press the enter key twice real fast. So it must be a bug somewhere.