public final static String getActiveContainerId(String standbyContainerID) {
    return standbyContainerID.split(STANDBY_CONTAINER_ID_SEPARATOR)[0];
  }
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