[jira] [Created] (BATIK-1107) CleanerThread may be started more than once

["Ralf Saier (JIRA)" <ji...@apache.org>]

Ralf Saier created BATIK-1107:
---------------------------------

             Summary: CleanerThread may be started more than once
                 Key: BATIK-1107
                 URL: https://issues.apache.org/jira/browse/BATIK-1107
             Project: Batik
          Issue Type: Bug
    Affects Versions: 1.7, trunk
            Reporter: Ralf Saier


Due to wrong synchronized block in CleanerThread.getReferenceQueue, the Thread may be started more than once.
wrong:
        if ( queue == null ) {
            synchronized (CleanerThread.class) {
                queue = new ReferenceQueue();
                thread = new CleanerThread();
            }
        }
 
correct:
        synchronized (CleanerThread.class) {
            if ( queue == null ) {
                queue = new ReferenceQueue();
                thread = new CleanerThread();
            }
        }
 



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