Name: dsR10078 Date: 10/09/2002

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The bug can be reproduced on Solaris/Linux with the following test case:
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import java.awt.*;
import java.awt.datatransfer.*;

public class Test {
    public static void main(String[] args) {
        Toolkit tk = Toolkit.getDefaultToolkit();
        Clipboard c1 = null;
        Clipboard c2 = null;
        if (args.length == 0) {
            c1 = tk.getSystemClipboard();
            c2 = tk.getSystemSelection();
        } else {
            c1 = tk.getSystemSelection();
            c2 = tk.getSystemClipboard();
        }
        final Clipboard clipboard = c2;
        final Transferable t = new StringSelection("TEXT");
        c1.setContents(t, null);
        for (int i = 0; i < 100; i++) {
            try {
                EventQueue.invokeAndWait(new Runnable() {
                        public void run() {
                            Transferable t = clipboard.getContents(null);
                            try {
                                System.err.println("data=" +
                                                   t.getTransferData(DataFlavor.stringFlavor));
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        }
                    });
            } catch (Exception e) {
                e.printStackTrace();
            }
            System.err.println("i=" + i);
        }
    }
}
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Steps to reproduce:
1.Compile the test case.
2.Run simultaneosly two instances of this test - one with an arbitrary command-line
  argument and the other without any arguments. For example:
   # java Test 1
   # java Test
3.Note that they start printing to the console and then both get blocked.
The thread dump at the point of deadlock is as follows:
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Full thread dump Java HotSpot(TM) Client VM (1.4.2-beta-b02 mixed mode):

"AWT-EventQueue-0" prio=1 tid=0x081cee30 nid=0x7b14 in Object.wait() [41617000..416178cc]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x4828ee40> (a java.lang.Class)
        at sun.awt.datatransfer.ClipboardTransferable.getClipboardData(Native Method)
        at sun.awt.datatransfer.ClipboardTransferable.fetchOneFlavor(ClipboardTransferable.java:106)
        at sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:80)
        at sun.awt.datatransfer.SunClipboard.getContents(SunClipboard.java:96)
        - locked <0x441d0308> (a sun.awt.motif.X11Clipboard)
        at Test$1.run(Test.java:23)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:171)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:449)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

"AWT-Motif" daemon prio=1 tid=0x081be6a0 nid=0x7b12 in Object.wait() [41595000..415968cc]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x4828ee40> (a java.lang.Class)
        at sun.awt.motif.MToolkitThreadBlockedHandler.enter(Native Method)
        at sun.awt.datatransfer.DataTransferer.convertData(DataTransferer.java:2026)
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java:536)

"AWT-Shutdown" prio=1 tid=0x081be328 nid=0x7b10 in Object.wait() [41515000..415158cc]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x4464c288> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:426)
        at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x4464c288> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:536)

"Signal Dispatcher" daemon prio=1 tid=0x08093648 nid=0x7b0b waiting on condition [0..0]

"Finalizer" daemon prio=1 tid=0x0808e588 nid=0x7b01 in Object.wait() [40bdb000..40bdb8cc]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44645448> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x44645448> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x0808cad8 nid=0x7b00 in Object.wait() [40b5a000..40b5a8cc]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x446454b0> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:426)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:113)
        - locked <0x446454b0> (a java.lang.ref.Reference$Lock)

"main" prio=1 tid=0x08051ef8 nid=0x7afd in Object.wait() [bfffc000..bfffce88]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44145f60> (a java.awt.EventQueue$1$AWTInvocationLock)
        at java.lang.Object.wait(Object.java:426)
        at java.awt.EventQueue.invokeAndWait(EventQueue.java:824)
        - locked <0x44145f60> (a java.awt.EventQueue$1$AWTInvocationLock)
        at Test.main(Test.java:21)

"VM Thread" prio=1 tid=0x080898f8 nid=0x7aff runnable

"VM Periodic Task Thread" prio=1 tid=0x08092168 nid=0x7b07 waiting on condition
"Suspend Checker Thread" prio=1 tid=0x08092bd8 nid=0x7b09 runnable
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This behavior was introduced with the fix for 4558797.
Before that fix the deadlock is not reproducible, but the two apps continuously throw
IOExceptions reporting data conversion failure:
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java.io.IOException: Failed to get selection targets
        at sun.awt.datatransfer.ClipboardTransferable.getClipboardData(Native Method)
        at sun.awt.datatransfer.ClipboardTransferable.fetchOneFlavor(ClipboardTransferable.java:106)
        at sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:80)
        at sun.awt.datatransfer.SunClipboard.getContents(SunClipboard.java:96)
        at Test$1.run(Test.java:23)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:171)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:449)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
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###@###.### 2002-10-09
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