Re: Task manager count goes the expand then converge process when running flink on YARN
since version 1.5 you don't need to specify the number of TaskManagers to start, because the system will figure this out. Moreover, in version 1.5.x and 1.6.x it is recommended to set the number of slots per TaskManager to 1 since we did not support multi task slot TaskManagers properly. The problem was that we start for every incoming slot request a separate TaskManager even though there might still be some free slots left. This has been fixed by FLINK-9455 . The fix will be released with the upcoming next major Flink release 1.7.