question How Tez decides the Reducers order and spins the containers in Support Questions

question How Tez decides the Reducers order and spins the containers in Support Questions https://community.cloudera.com/t5/Support-Questions/How-Tez-decides-the-Reducers-order-and-spins-the-containers/m-p/304075#M221871 In My HDP 3.1.5 cluster, Tez is not following the reducer order in the VERTICES (shown in the first pic). I am interested in knowing how Tez decides the order and number of containers in a VERTICES. I can even see single-digit containers in a few VERTICES. Resources are free on the cluster but it has very few containers running. <img src="https://community.cloudera.com/t5/image/serverpage/image-id/29096iFD9EFBF043791742/image-size/medium?v=v2&px=400" role="button" title="santoshh_0-1602161140129.png" alt="santoshh_0-1602161140129.png" /> <IMG border="0" alt="" />  Thu, 08 Oct 2020 12:50:44 GMT santoshh 2020-10-08T12:50:44Z