[FLINK-10214] why is job applying as many TMs as default parallelism when starting, each parallelism is 1

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 1.5.0
• Component/s: Deployment / YARN, Runtime / Coordination
• Assignee: Unassigned
• Reporter: lzh9
• Created: 25/Aug/18 03:00
• Updated: 27/Apr/21 18:06
• Resolved: 25/Aug/18 09:28

Description

If I set TM number=6, slot num each TM=8, memory each TM=4G, the job will apply 48 TMs, and use only one slot each, total memory usage is 192G. A few minutes later, it will release 40TMs, everything will be normal. 

Is there any reason about it? 

Issue Links

• is related to: FLINK-9455 Make SlotManager aware of multi slot TaskManagers