java.nio.BufferUnderflowException
2013-12-24 18:05:32 [INFO] [STDERR]     at java.nio.Buffer.nextGetIndex(Unknown Source)
2013-12-24 18:05:32 [INFO] [STDERR]     at java.nio.HeapByteBuffer.getLong(Unknown Source)
2013-12-24 18:05:32 [INFO] [STDERR]     at deadmansswitch.DeadMansSwitch.checkForDeadMansSwitchReset(DeadMansSwitch.java:148)

which is long timeMilliseconds = bb.getLong();



public static boolean checkForDeadMansSwitchReset() {
        try {
            RandomAccessFile file = new RandomAccessFile("." + File.separator + "DeadMansSwitch.txt", "rw");
            FileChannel fc = file.getChannel();
            ByteBuffer bb = ByteBuffer.allocate(8);
            int bytesRead = fc.read(bb);
            long timeMilliseconds = bb.getLong();
            fc.close();
            System.out.println("read timeMilliseconds: " + timeMilliseconds);
            if (timeMilliseconds != -1 && timeMilliseconds + restartThreshold > System.currentTimeMillis()) {
                System.out.println("we should restart!");
                return true;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {

        }
        return false;
    }



    public static void resetDeadMansSwitch(long timeVal) {
        FileChannel fc = null;
        try {
            RandomAccessFile file = new RandomAccessFile("." + File.separator + "DeadMansSwitch.txt", "rw");
            fc = file.getChannel();
            ByteBuffer bb = ByteBuffer.allocate(8);
            bb.clear();
            bb.putLong(timeVal);
            bb.flip();
            while(bb.hasRemaining()) {
                fc.write(bb);
            }
            fc.close();
            System.out.println("write timeMilliseconds: " + timeVal);
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {

        }
    }