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The 2.7.3 version upgrade is a two step process.

1. Set pinot.server.realtime.replicaCount to 0. Keep note of the original value of this field because we will set it back to that value in step 4.

2. Run helm upgrade as usual.

3. Make sure all pods and jobs have finished successfully.

4. Set pinot.server.realtime.replicaCount back to its original value in the values.yaml file.

5. Either run helm upgrade again.
   Alternatively, you could run kubectl scale sts pinot-server-realtime --replicas=N

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