byte[] fileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            fileId[i] = (byte) (i + 1);
        }

        manager.updateHandleFileId(guid, fileId);

        HandleInfo info = manager.getHandleByGuid(guid);
        assertArrayEquals(fileId, info.getFileId());
    }

    @Test
    public void testGetHandleForReconnect() {

    }

    /**
     * Update the file ID for a handle after successful create response
     * @param guid the handle GUID
     * @param fileId the 16-byte file ID
     */
    public void updateHandleFileId(HandleGuid guid, byte[] fileId) {
        lock.writeLock().lock();
        try {
            HandleInfo info = guidToHandle.get(guid);
            if (info != null) {
                info.updateFileId(fileId);

        guidToHandle.put(guid, info);
        
        if (type == HandleType.PERSISTENT) {
            persistHandle(info);
        }
        
        return guid;
    }
    
    public void updateHandleFileId(HandleGuid guid, byte[] fileId) {
        HandleInfo info = guidToHandle.get(guid);
        if (info != null) {
            System.arraycopy(fileId, 0, info.fileId, 0, 16);