@Override
  public String toString() {
    return "EventType: " + eventType + " EventStartTimestamp: " + eventStartTimestamp + " elapsedTime: " +
      elapsedTime + " wmTezSessionInfo:" + wmTezSessionInfo;
  }
Workload Manager events at query level.
ql/src/java/org/apache/hadoop/hive/ql/exec/tez/WmEvent.java