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Coordinator will poll metadatastore for new segments. Can you check network connectivity or can you do a

mysql

from coordinator pod to mds pod?

Thank you Brandon for responding. Do you mean, there might be a connectivity issue between google cloudsql and the coordinator pod?

Just a hypothesis

sorry, I am pretty new to this. Could you please give more details about which jar and which classpath. I mean how to do that.

I am new to google cloudSql

ok, no problem. Let me try to compare it with the config where we have the mysql on a separate pod in cluster. Then where do we find the jar and how do we set the CLASSPATH there?

you should put mysql-connector-java-5.1.49.jar under lib directory of your druid installation

There are more instructions here: https://druid.apache.org/docs/latest/development/extensions-core/mysql.html#installing-the-mysql-connector-library. Though none of them directly address installing it in K8s/Helm. The simplest thing to do might be to build a custom docker image with the MySQL library in there.

Thank you everyone and @Vijay Narayanan. Switching to Postgresql helped fixing the issue.