in flume-legacy-thrift-source/src/main/java/com/cloudera/flume/handlers/thrift/ThriftFlumeEventServer.java [555:563]
public int hashCode() {
int hashCode = 1;
hashCode = hashCode * 8191 + ((isSetEvt()) ? 131071 : 524287);
if (isSetEvt())
hashCode = hashCode * 8191 + evt.hashCode();
return hashCode;
}