I have written a blog on this,  Kindly refer to blog to setup dbcp connection pool Lookup controller service and execute same query in multiple databases.   Please follow this link, it is with an example with step by step instructions to setup the same: https://bigdata-galaxy.blogspot.com/2020/04/nifi-querying-multiple-databases-using.html      ... View more

I was facing the same issue after updating to HDF 3.4.1.1, couldn't update/create new version of an existing schema. The solution worked out for me as well. I first checked whether the schema in question has a record in schema_lock. It hadn't. As well as most of the schemas in our registry.   Thank you very much for sharing! ... View more