[Bug] The UniformLoadShedder strategy fails when the traffic is less than 1000(delta)

[hanmz]

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• I searched in the issues and found nothing similar.

Version

3.0

Minimal reproduce step

The cluster configuration information is as follows(other load balacnce configurations remain at default values)：
loadBalancerEnabled=true
loadBalancerSheddingEnabled=true
loadBalancerSheddingGracePeriodMinutes=5
minUnloadMessage=0
minUnloadMessageThroughput=0

1、Start the first broker
2、Create a multi-partition topic and distribute the partitions on different bundles
3、Send messages to the topic at a speed less than 1000 TPS(for example 600TPS)
4、After waiting for the send to stabilize, start the second broker node

What did you expect to see?

The second broker is only allocated part of the traffic, and the traffic of the brokers is relatively balanced.

What did you see instead?

The second broker distributes all traffic.

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!