Dave Chen 3e65fe4378 Change the exception to avoid the cost of preemption ...

node's labels doesn't contain the required topologyKeys in `Constraints`
cannot be resolved by preempting the pods on that pods.

One use case that could easily reproduce the issue is,
- set `alwaysCheckAllPredicates` to true.
- one node contains all the required topologyKeys but is failed in predicates
  such as 'taint'.
- another node doesn't hold all the required topologyKeys, and thus return `Unschedulable`
  status code.
- scheduler will try to preempt the pods on the above node with lower priorities.

Signed-off-by: Dave Chen <dave.chen@arm.com>

2020-07-03 10:17:31 +08:00

3.5 KiB

Raw Blame History

View Raw