@Override
  void updateFromRegistry(TezAmInstance si, int ephSeqVersion) {
    updateAmEndpointInfo(si, ephSeqVersion);
    if (si != null) {
      handleGuaranteedTasksChange(si.getGuaranteedCount());
    }
  }
The actual state of the guaranteed task, and the update state, for the session.
ql/src/java/org/apache/hadoop/hive/ql/exec/tez/WmTezSession.java