spark.dynamicAllocation.executorIdleTimeout = 60
Can this be lowered? Is there any benefit/harm?
My question is regarding preemption. Are executors of a preempted container "idle". or is this idle step skipped during preemption?
Thank you for posting the query with us.
Basically when you enable Dynamic allocation it gracefully remove the Idle containers which were idle for (60s as default) But when you lower the value will remove the executors frequently depending upon the executor's usage (just like the tasks getting allocated to those executors and the amount of tasks required)
Also, the above said behaviour is upto Spark (and yarn container pre-emption wont be aware of it)