def get_log_info(prefix='', rconn=None):
    """Return info log as a list of log strings, newest first. On failure, returns empty list"""
    if rconn is None:
        return []
    # get data from redis
    try:
        logset = rconn.lrange(prefix+"log_info", 0, -1)
    except:
        return []
    if logset:
        loglines = [ item.decode('utf-8') for item in logset ]
    else:
        return []
    loglines.reverse()
    return loglines