I recently ran into a very strange behavior described in detail in the mail linked at the bottom of this description. In short:
- Default settings didn't distribute nodes evenly on brand new 50 node cluster
- Can't seem to write rules producing suggestions to distribute them evenly
- Suggestions are made that then fail despite quiet cluster, no changes.
Also of note was diagnostic output containing this seemingly impossible result with 2 cores counted and no replicas listed:
I will attach anonymized cluster status output and autoscaling.json shortly
This issue may be related to