This message was deleted.

Well no one here is restarting their cluster to see aggregations or transformations working, but maybe a bit more context? Are you running batch (s3, hdfs) or streaming (kafka, kinesis) ingestions? Are these aggregations rollup jobs? How are you setting them? Are you appending or replacing data? Maybe you could provide a ingestion spec sample so we could understand the job, the transformations.

This is just a strictly "does Druid offer this" type question @Luiz Augusto

For Druid the question may be more related to Broadcast tables and Lookups following a cluster restart ... I'm not sure if this just works the same way as Historicals loading segments (i.e. they are loaded immediately upon cluster restart once the Coordinator gets things sorted out).