Issue with Multi-Stage Query Engine in Apache Pinot 0.11.0 Hello Apache Pinot Team, I am currently encountering an issue with the multi-stage query engine in Apache Pinot version 0.11.0, which leads to a

NullPointerException

when executing simple queries. I've tried enabling the multi-stage engine according to the documentation, but it seems there might be a deeper configuration or runtime issue. *Environment: Pinot Version: 0.11.0 Deployment: Docker-compose Components Configured: Controller, Broker, and Server *Controller Configuration (

controller.conf

):

controller.helix.cluster.name=bigdata-pinot-ansible
controller.port=9000
...
pinot.multistage.engine.enabled=true
pinot.query.server.port=8421
pinot.query.runner.port=8442

*Issue Description: When attempting to run the query

SELECT * FROM insight_product LIMIT 10

, the system throws the following error:

SQLParsingError:
java.lang.RuntimeException: Error composing query plan for: select * from insight_product limit 10
    at org.apache.pinot.query.QueryEnvironment.planQuery(QueryEnvironment.java:136)
    ...
Caused by: java.lang.NullPointerException
    at org.apache.pinot.query.routing.WorkerManager.assignWorkerToStage(WorkerManager.java:63)
    ...

*Troubleshooting Done: Confirmed network connectivity and settings in Docker. Ensured all services are reachable and communicating. Checked logs for additional clues but found none indicating configuration issues prior to the error. I suspect there might be an issue with how workers are assigned to stages or possibly a deeper integration issue. Could you please help me understand if there is a configuration I might be missing or if this points to a potential bug in the multi-stage engine? Thank you for your assistance.

Replied here https://apache-pinot.slack.com/archives/C011C9JHN7R/p1714398021745659?thread_ts=1714305204.460829&channel=C011C9JHN7R&message_ts=1714398021.745659

My production cluster now is now on this version and I can't to update it to new version