317brian commented on code in PR #18286:
URL: https://github.com/apache/druid/pull/18286#discussion_r2223255727


##########
docs/tutorials/tutorial-batch-hadoop.md:
##########
@@ -23,6 +23,11 @@ sidebar_label: Load from Apache Hadoop
   ~ under the License.
   -->
 
+:::caution[Deprecated]
+
+Hadoop-based ingestion 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:
   ```suggestion
   Hadoop-based ingestion 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.
   
   You must now explicitly opt-in to using the deprecated `index_hadoop` task 
type. To opt-in, set `druid.indexer.task.allowHadoopTaskExecution` to `true` in 
your `common.runtime.properties` file. For more information, see 
[#18239](https://github.com/apache/druid/pull/18239)
   ```



##########
docs/tutorials/tutorial-kerberos-hadoop.md:
##########
@@ -23,6 +23,12 @@ sidebar_label: Kerberized HDFS deep storage
   ~ under the License.
   -->
 
+:::caution[Deprecated]
+
+Hadoop-based ingestion 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:
   ```suggestion
   Hadoop-based ingestion 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.
   
   You must now explicitly opt-in to using the deprecated `index_hadoop` task 
type. To opt-in, set `druid.indexer.task.allowHadoopTaskExecution` to `true` in 
your `common.runtime.properties` file. For more information, see 
[#18239](https://github.com/apache/druid/pull/18239)
   ```



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