Thank you Gary. Regarding your previous suggestion to to change the configuration regarding to the number of vcores on the EMR master node, I tried and found one funny/bad behaviour as following: * hardware onfiguration: master node: 4vcores + 8GB ram, 2x executors with 16vcores + 32GB ram each. * Flink launch parameters: -yn 2 -ys 16 -ytm 4g... 4 TMs were created, with 2 of them were used (0 free slots) and two others not used (16 free slots). The bad thing is most of the time 2 free TMs are on a same machine, and two occupied ones are on the other machine. If I dont change the Hadoop configurations then still 4 TMs created, but the occupied ones are always on two different servers.
I'm not sure whether that's EMR's issue, or YARN's or Flink's. Thanks and regards, Averell -- Sent from: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/
