v.20.3Improvement

Display Zookeeper Exception for system.replicas in Separate Column

If zookeeper exception has happened while fetching data for system.replicas, display it in a separate column. This implements #9137 #9138 (alexey-milovidov)
Displays ZooKeeper exceptions in a separate column when fetching data for system.replicas table.

Why it matters

This feature helps users identify and troubleshoot issues related to ZooKeeper communication errors by explicitly showing exceptions encountered while retrieving replica data, improving observability and debugging.

How to use it

Query the system.replicas table as usual. If a ZooKeeper exception occurs during data fetching, it will appear in a new dedicated column alongside the replica information.