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What type of lookup you are creating, could you share the json from the console for the lookup. Sometimes it takes a bit of time to have the lookup ready. Here is a blog that gives an example: https://blog.hellmar-becker.de/2021/10/14/druid-data-modeling-special-lookups-and-multi-value-dimensions/

Hope you have followed the below link and added the require extension(

druid-lookups-cached-global

and

druid-kafka-extraction-namespace

) and restarted the services after adding the extension, you could check coordinator log for some more information on the error as well. https://druid.apache.org/docs/latest/development/extensions-core/kafka-extraction-namespace/

@Bibek Sahoo Hi Bibek, With the above one we have tried, and updated in the druid, but its not reflecting. we have added the below one, # Druid extensions druid_extensions_loadList=["druid-lookups-cached-global", "druid-kafka-extraction-namespace"] # Lookup Configuration druid.lookup.namespaceKafkaKv.kafkalookup.type=kafkalookup druid.lookup.namespaceKafkaKv.kafkalookup.lookupService=kafkalookup druid.lookup.namespaceKafkaKv.kafkalookup.isOneToOneMap=false druid.lookup.namespaceKafkaKv.kafkalookup.pollTimeout=5000

It should be in common.runtime.properties

druid.extensions.loadList

, in the above it is showing as druid_ it should be druid.

actually we have installed the druid in Docker-compose, so we will add it in the common environment file.

ok

we have added all extension but same error found