RFR: 8048020 - Regression on java.util.logging.FileHandler

[Jason Mehrens]

Alan,


> Catching OverlappingFileLockException is usually a sign of a mis-use. 
> Can you summarize how this comes about (given the locking on "locks"). 


Malicious intent or ignorant mis-use by code outside of the FileHandler can turn the FileHandler into a victim of that misuse.


=======

public static void main(String[] args) throws Exception {
        Path p = Files.createTempFile("test", "test");
        try (FileChannel pathogen = FileChannel.open(p, CREATE, WRITE)) {
            FileLock lck = pathogen.lock();
            System.out.println(lck);
            try (FileChannel fileHandler = FileChannel.open(p, WRITE, APPEND)) {
                FileLock fhl = fileHandler.lock();
                System.out.println(fhl);
            }
        } finally {
            Files.deleteIfExists(p);
        }
    }

=========

sun.nio.ch.FileLockImpl[0:9223372036854775807 exclusive valid]
Exception in thread "main" java.nio.channels.OverlappingFileLockException

=================


Jason