```java
@Override
public BalancerSegmentHolder pickSegmentToMove(final List<ServerHolder>
serverHolders)
{
ReservoirSegmentSampler sampler = new ReservoirSegmentSampler();
return sampler.getRandomBalancerSegmentHolder(serverHolders);
}
```
I see a probability here that the coordinator peaks the same segment several
times within a single rebalancing phase as nothing keeps the record of selected
segments.
[ Full content available at:
https://github.com/apache/incubator-druid/issues/6329 ]
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