capistrant commented on code in PR #18286:
URL: https://github.com/apache/druid/pull/18286#discussion_r2260508953


##########
docs/ingestion/hadoop.md:
##########
@@ -23,6 +23,15 @@ sidebar_label: "Hadoop-based"
   ~ under the License.
   -->
 
+:::caution[Deprecated]
+
+Hadoop-based ingestion is deprecated. Use [SQL-based 
ingestion](../multi-stage-query/index.md) instead of MapReduce or 
[MiddleManager-less ingestion using 
Kubernetes](../development/extensions-core/k8s-jobs.md) instead of YARN.

Review Comment:
   Not sure about the wording here. MapReduce jobs usually run on YARN when 
talking about how someone is using hadoop for ingest. Could we just say 
something along the lines of:
   ```suggestion
   Hadoop-based ingestion is deprecated. We recommend one of Druid's other 
supported ingestion patterns, such as [SQL-based 
ingestion](../multi-stage-query/index.md) or [MiddleManager-less ingestion 
using Kubernetes](../development/extensions-core/k8s-jobs.md)
   ```



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