doc: comment on spark history integration (#559)

* doc: comment on spark history integration

* Update docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc

Co-authored-by: Sebastian Bernauer <[email protected]>

---------

Co-authored-by: Sebastian Bernauer <[email protected]>

Author: razvan

CHANGELOG.md

@@ -18,6 +18,7 @@ All notable changes to this project will be documented in this file.
   - Replace stackable-operator `print_startup_string` with `tracing::info!` with fields.
 - BREAKING: Inject the vector aggregator address into the vector config using the env var `VECTOR_AGGREGATOR_ADDRESS` instead
     of having the operator write it to the vector config ([#551]).
+- Document that Spark Connect doesn't integrate with the history server ([#559])
 
 ### Fixed
 
@@ -28,6 +29,7 @@ All notable changes to this project will be documented in this file.
 [#551]: https://github.com/stackabletech/spark-k8s-operator/pull/551
 [#553]: https://github.com/stackabletech/spark-k8s-operator/pull/553
 [#554]: https://github.com/stackabletech/spark-k8s-operator/pull/554
+[#559]: https://github.com/stackabletech/spark-k8s-operator/pull/559
 
 ## [25.3.0] - 2025-03-21
 

docs/modules/spark-k8s/pages/usage-guide/spark-connect.adoc

@@ -45,11 +45,15 @@ spec:
 
 The example above adds a new endpoint for application metrics.
 
+== Spark History Server
+
+Unforunately integration with the Spark History Server is not supported yet.
+The connect server seems to ignore the `spark.eventLog` properties while also prohibiting clients to set them programatically.
+
 == Notable Omissions
 
 The following features are not supported by the Stackable Spark operator yet
 
-* Integration with the Spark History Server.
 * Authorization and authentication. Currently, anyone with access to the Spark Connect service can run jobs.
 * Volumes and volume mounts can be added only with pod overrides.
 * Job dependencies must be provisioned as custom images or via `--packages` or `--jars` arguments.