public final static TaskName getActiveTaskName(TaskName standbyTaskName) {
    return new TaskName(standbyTaskName.getTaskName().split(TASKNAME_SEPARATOR)[1]);
  }
Returns true if the containerName implies a standby container, false otherwise.
@param containerID The desired containerID
@return
samza-core/src/main/java/org/apache/samza/clustermanager/StandbyTaskUtil.java