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  1. JDK
  2. JDK-8023095

Applet with legacy_lifecycle=true and jdwp properties destroyed on browseaway

    Details

    • Subcomponent:
    • Resolved In Build:
      b12
    • OS:
      windows_7

      Backports

        Description

        FULL PRODUCT VERSION :
          From Java console:

        Java Plug-in 10.40.2.38
        Using JRE version 1.7.0_40-ea-b38 Java HotSpot(TM) Client VM

        ADDITIONAL OS VERSION INFORMATION :
        Windows 7 (Microsoft Windows [Version 6.1.7601])

        A DESCRIPTION OF THE PROBLEM :
        Using an applet configured with the legacy_lifecycle parameter set to true, so that an applet frame remains open even when the user browses away from the original page, the applet is destroyed on browse-away if the Java control panel is configured with the JDWP properties used to enable remote debugging.

        Without the JDWP properties configured, the applet remains alive even after browsing off the applet page.

        This last worked fully in 7u17, then JDWP remote debugging stopped working in 7u21 and 7u25 while the legacy_lifecycle=true behavior continued to work (that is, if JDWP props were set, browse-away would not destroy the separate applet frame, but JDWP itself was in-op). Now in 7u40-ea-b38, JDWP works again, but if JDWP props are configured, applet with legacy_lifecycle=true is destroyed on browse-away.

        REGRESSION. Last worked in version 7u17

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Create an applet that opens a separate frame as a test that the applet remains running when you browse off the HTML page. With 7u40, the applet must also be jar'ed.

        In the HTML applet tag, set the " legacy_lifecycle " parameter to " true " .

        In the Java control panel -> Java tab -> View -> Java Runtime Environment Settings dialog, add these JDWP props as the runtime parameters:

        -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

        Load the HTML page into the browser, so the applet loads, accepting any required security prompts.

        Once the applet frame has been displayed, navigate to another website. The applet frame should remain alive.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        The applet should remain alive when browsing away from the HTML page.
        ACTUAL -
        The applet is destroyed on browse-away.

        ERROR MESSAGES/STACK TRACES THAT OCCUR :
        No error messages, but when problem occurs, Java console has this output (at tail end):

        security: SSV validation: running: 1.7.0_40-ea, requested: null, range: null
        network: Created version ID: 1.7.0.40
        network: Created version ID: 1.7.0.40
        security: continue with running version
        network: Created version ID: 1.7.0.40.ea
        network: Created version ID: 1.7
        network: Created version ID: 2.2.40
        security: --- parseCommandLine converted : -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
        into:
        [-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005]
        network: Created version ID: 1.9
        network: Created version ID: 1.8
        network: Created version ID: 1.7
        network: Created version ID: 1.6
        network: Created version ID: 1.5
        network: Created version ID: 1.4
        network: Created version ID: 1.3
        basic: WARNING - specified JRE version, null is invalid platform version
        basic: Removed progress listener: sun.plugin.util.ProgressMonitorAdapter@1c74402
        basic: Saving session state to C:\Users\username\AppData\Local\Temp\session2717596495410700379
        basic: Remote relaunch: LaunchJVMAppletMessage{appletID=1, conversationID=0, javaHome=C:\Program Files (x86)\Java\jre7, launchTime=81474922265, sendKill=false, [sun.plugin2.main.client.PluginMain, write_pipe_name=jpi2_pid7360_pipe5,read_pipe_name=jpi2_pid7360_pipe4]}
        security: --- parseCommandLine converted : -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
        into:
        [-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005]
        security: --- parseCommandLine converted : -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
        into:
        [-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005]
        network: Created version ID: 2.0+
        network: Created version ID: 1.6.0.10
        basic: RemoteJVMLauncher.start(), pipe=Pipe{transport=WindowsNamedPipe: server: false; readPipe: jpi2_pid7360_pipe2, readBufferSz: 4096; writePipe: jpi2_pid7360_pipe3, writeBufferSz: 4096, initiatingSide=false} message: LaunchJVMAppletMessage{appletID=1, conversationID=0, javaHome=C:\Program Files (x86)\Java\jre7, launchTime=81474922265, sendKill=false, [sun.plugin2.main.client.PluginMain, write_pipe_name=jpi2_pid7360_pipe5,read_pipe_name=jpi2_pid7360_pipe4]}
        basic: Thread[RemoteJVMLauncher-1,5,main] running...
        basic: RemoteJVMLauncher.afterStart(): initializing streamers
        handleLaunchJVM(): RemoteJVMLauncer.setCallBack for 1
        handleLaunchJVM(): now unregisterApplet 1
        basic: PluginMain.unregisterApplet: 1 from mananger sun.plugin2.applet.Applet2Manager@a55130
        basic: Thread[RemoteJVMLauncher-1,5,main] completing: done=true exited=false
        basic: Sending final message LaunchJVMAppletMessage{appletID=1, conversationID=0, process started=true, process exited=true, process exitedCode=0}

        ------------------

        When JDWP properties are omitted from control panel, tail end of console has this output instead:

        security: SSV validation: running: 1.7.0_40-ea, requested: null, range: null
        network: Created version ID: 1.7.0.40
        network: Created version ID: 1.7.0.40
        security: continue with running version
        network: Created version ID: 1.7.0.40.ea
        network: Created version ID: 1.7
        network: Created version ID: 2.2.40
        security: --- parseCommandLine converted :
        into:
        []
        basic: Applet loaded.
        basic: Applet resized and added to parent container
        basic: PERF: AppletExecutionRunnable - applet.init() BEGIN ; jvmLaunch dt 116134 us, pluginInit dt 2860324 us, TotalTime: 2976458 us
        ClockFrame.init
        basic: Applet initialized
        basic: Starting applet
        basic: completed perf rollup
        basic: Applet made visible
        basic: Applet started
        basic: Told clients applet is started
        basic: Starting applet teardown
        basic: Finished applet teardown
        basic: PluginMain.unregisterApplet: 1 from mananger sun.plugin2.applet.Applet2Manager@19c705e
        basic: Removed progress listener: sun.plugin.util.ProgressMonitorAdapter@87281f
        basic: Applet supports legacy lifecycle model - add applet to lifecycle cache



        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        import java.awt.*;
        import java.util.Date;
        import javax.swing.*;

        public class ClockFrame extends JApplet
        {
        public void init()
        {
        System.out.println( " ClockFrame.init " );

        final Thread t = new Thread( " Init thread " )
        {
        public void run()
        {
        frameUp();
        }
        };
        t.start();
        }

        private void frameUp()
        {
        JFrame frame = new JFrame();
        frame.setLayout( new BorderLayout() );
        frame.setSize( 200, 170 );
        frame.setLocation( 200, 200 );
        final JLabel label = new JLabel();
        label.setText( new Date().toString() );
        new Thread( new Runnable() {
        public void run()
        {
        while( true )
        {
        try
        {
        Thread.sleep( 1000 );
        label.setText( new Date().toString() );
        }
        catch( Exception e )
        {
        // ignore
        }
        }
        }
        }).start();
        frame.add( label, BorderLayout.CENTER );
        frame.setVisible(true);
        }
        }

        -------------------
        HTML for launching applet:

        <html>
        <body>
        <applet code= " ClockFrame " codebase= " . " height= " 100 " width= " 150 " name= " ClockFrame " archive= " ClockFrame.jar " >
            <param name= " legacy_lifecycle " value= " true " >
        </applet>
        </body>
        </html>


        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        Remove JDWP properties from Java control panel, or don't browse off page hosting the original applet.

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                • Assignee:
                  dtitov Daniil Titov (Inactive)
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: