在释放Java文件锁时遇到问题

我与nio合作不多，在释放文件锁方面遇到了一些问题。基本上，在JVM-A中，我在一个文件上有一个不可共享的写锁，看起来像这样：

File lockfile = new File("m.lock");
RandomAccessFile writeFile = new RandomAccessFile(lockfile, "rw");
FileChannel writeChannel = writeFile.getChannel();
FileLock writeLock = writeChannel.tryLock(0L, Long.MAX_VALUE, false);

File lockfile = new File("m.lock");
RandomAccessFile readFile = new RandomAccessFile(lockfile, "r");
FileChannel readChannel = readFile.getChannel();
FileLock readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);  
while (readLock == null) {
    System.out.println("unable to get lock");
    Thread.sleep(5000);
    readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);
}

readChannel.tryLock(0L, Long.MAX_VALUE, true);

然后在JVM-B中，我尝试在同一个文件上创建一个可共享的读锁，如下所示：

File lockfile = new File("m.lock");
RandomAccessFile writeFile = new RandomAccessFile(lockfile, "rw");
FileChannel writeChannel = writeFile.getChannel();
FileLock writeLock = writeChannel.tryLock(0L, Long.MAX_VALUE, false);

File lockfile = new File("m.lock");
RandomAccessFile readFile = new RandomAccessFile(lockfile, "r");
FileChannel readChannel = readFile.getChannel();
FileLock readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);  
while (readLock == null) {
    System.out.println("unable to get lock");
    Thread.sleep(5000);
    readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);
}

readChannel.tryLock(0L, Long.MAX_VALUE, true);

我的问题是JVM-B永远循环，永远不会得到可共享的读锁。即使JVM-A执行

writeLock.release（）
writeChannel.close（）
和
writeFile.close（）即使JVM-A退出并不再运行，JVM-B仍然无法获得文件的可共享读锁

那么我在这里遗漏了什么呢？
我的错误各位，我发现了我的错误。我的代码如下所示：

File lockfile = new File("m.lock");
RandomAccessFile writeFile = new RandomAccessFile(lockfile, "rw");
FileChannel writeChannel = writeFile.getChannel();
FileLock writeLock = writeChannel.tryLock(0L, Long.MAX_VALUE, false);

File lockfile = new File("m.lock");
RandomAccessFile readFile = new RandomAccessFile(lockfile, "r");
FileChannel readChannel = readFile.getChannel();
FileLock readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);  
while (readLock == null) {
    System.out.println("unable to get lock");
    Thread.sleep(5000);
    readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);
}

readChannel.tryLock(0L, Long.MAX_VALUE, true);

与此相反：

readLock = readChannel.tryLock(0L, Long.MAX_VALUE, true);

我错过了变量赋值。
请写出您得到的输出，以便更好地理解。