Re: thread deadlock on Mac Intel under apple.laf.AquaDirectoryModel

On 3/20/06, Jim Davidson <email@hidden> wrote:

My Java app is hitting thread deadlock on Mac Intel.  This does not
happen with any other platform, including PPC.  On Mac Intel, it happens
with 1.4.2, and the released version of 1.5.  It does *not* happen with
the latest DP (J2SE 5.0 R4 DP6).

Here's a part of the thread dump:

"AWT-EventQueue-1" prio=6 tid=0x005147a0 nid=0x1975c00 waiting for monitor
entry [0xb0f88000..0xb0f88d10]
        at java.awt.Component.invalidate (Component.java:2427)
        - waiting to lock <0x083d1ff8> (a java.awt.Component$AWTTreeLock)
        at java.awt.Container.invalidate(Container.java:1419)
        at javax.swing.JComponent.revalidate(JComponent.java :4573)
        at javax.swing.JTable.tableRowsInserted(JTable.java:3097)
        at javax.swing.JTable.tableChanged(JTable.java:3020)
        at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java :280)
        at javax.swing.table.AbstractTableModel.fireTableRowsInserted(AbstractTableModel.java:215)
        at apple.laf.AquaDirectoryModel$DoChangeContents.run(AquaDirectoryModel.java:447)
        - locked <0x06651188> (a java.lang.Object)
        - locked <0x06687ca8> (a java.lang.Object)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java :461)
           .............

"Module-Actions" daemon prio=1 tid=0x0054a030 nid=0x1a47400 waiting for monitor entry [0xb130e000..0xb130fd10]
        at apple.laf.AquaDirectoryModel.getRowCount(AquaDirectoryModel.java :184)
        - waiting to lock <0x06651188> (a java.lang.Object)
        at javax.swing.JTable.getRowCount(JTable.java:1797)
        at javax.swing.plaf.basic.BasicTableUI.createTableSize(BasicTableUI.java :1694)
        at javax.swing.plaf.basic.BasicTableUI.getPreferredSize(BasicTableUI.java:1735)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1615)
        at javax.swing.JViewport.getViewSize (JViewport.java:1001)
        at javax.swing.ScrollPaneLayout.preferredLayoutSize(ScrollPaneLayout.java:476)
        at java.awt.Container.preferredSize(Container.java:1558)
        - locked <0x083d1ff8> (a java.awt.Component$AWTTreeLock)
        at java.awt.Container.getPreferredSize(Container.java:1543)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1617)
        at java.awt.BorderLayout.preferredLayoutSize (BorderLayout.java:690)
        - locked <0x083d1ff8> (a java.awt.Component$AWTTreeLock)
        at java.awt.Container.preferredSize(Container.java:1558)
        - locked <0x083d1ff8> (a java.awt.Component$AWTTreeLock )
        at java.awt.Container.getPreferredSize(Container.java:1543)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1617)
        at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java :690)
        .......................

Found one Java-level deadlock:
=============================
"Module-Actions":
  waiting to lock monitor 0x0180f1b4 (object 0x06651188, a java.lang.Object ),
  which is held by "AWT-EventQueue-1"
"AWT-EventQueue-1":
  waiting to lock monitor 0x0180f100 (object 0x083d1ff8, a java.awt.Component$AWTTreeLock),
  which is held by "Module-Actions"

I notice that both stack traces contain AquaDirectoryModel.  I'm
guessing that's the source of the problem, since this doesn't occur on
any other platform.  This seems to be similar to the problem reported
in: <http://tykje.com/unpackingjavamustangonosx>

Looking at the release notes for the various DPs, there's nothing about
bugfixes in AquaDirectoryModel, but DP5 reported a fix:
        "( 4400344 ) Application deadlocks in JTable"
But, this isn't enough information to determine whether the bug
was the same.

Has anyone else seen this?  Maybe some docs on the AquaDirectoryModel
class?  A list search didn't turn up anything.  I'm hoping to find a
workaround, since there's presently no released version of Java that
this works on.

-Jim
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References:
	>thread deadlock on Mac Intel under apple.laf.AquaDirectoryModel (From: Jim Davidson <email@hidden>)