in core/src/main/scala/org/apache/spark/sql/eventhubs/EventHubsSource.scala [478:484]
private def compare(a: ExecutorCacheTaskLocation, b: ExecutorCacheTaskLocation): Boolean = {
if (a.host == b.host) {
a.executorId > b.executorId
} else {
a.host > b.host
}
}