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From "Alexey Petrenko (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-4634) [classlib][swing]SplitPane triggers the deadlock in AbstractDocument$ReadWriteLock
Date Fri, 14 Sep 2007 10:05:33 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-4634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexey Petrenko resolved HARMONY-4634.
--------------------------------------

    Resolution: Fixed

The patch has been applied.
Please verify.

> [classlib][swing]SplitPane triggers the deadlock in AbstractDocument$ReadWriteLock
> ----------------------------------------------------------------------------------
>
>                 Key: HARMONY-4634
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4634
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>         Environment: Win32
>            Reporter: Alexey Petrenko
>            Assignee: Alexey Petrenko
>         Attachments: HARMONY-4634-ReadWriteLock.patch
>
>
> We need a better patch for HARMONY-4624.
> Here is a description from HARMONY-4624:
>  Dead lock possibilities are seen in the synchronized metnods of AbstractDocument$ReadWriteLock.
>         public final synchronized void readLock() {
>             final Thread thread = Thread.currentThread();
>             if (writer != thread) {
>                 while (writerCount > 0) {
>                     try { wait(); }
>                     catch (final InterruptedException e) { }
>                 }
>             }
>             readers.add(thread);
>         }
>  Waiting in synchronized methods (requires another synchronized method to wakeup it)
likely just dies there.
>  Multithreaded SplitPane application triggers the possibility. One thread can operate
at the texts of the LeftComponent, thus in a critical section after setting writercount(writeLock()).
The other thread can operate at the rightComponent, then call the readLock() of LeftComponent
via layout managment and just waits there.

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