chore: bump versions for 26.3 release

CHANGELOG.md

@@ -8,8 +8,14 @@ All notable changes to this project will be documented in this file.
 
 - Support objectOverrides using `.spec.objectOverrides` on the `SparkConnectServer` and `SparkHistoryServer`.
   See [objectOverrides concepts page](https://docs.stackable.tech/home/nightly/concepts/overrides/#object-overrides) for details ([#640]).
+- Support for Spark `4.1.1` ([#642]).
+
+### Removed
+
+- Support for Spark `3.5.6` ([#642]).
 
 [#640]: https://github.com/stackabletech/spark-k8s-operator/pull/640
+[#642]: https://github.com/stackabletech/spark-k8s-operator/pull/642
 
 ## [25.11.0] - 2025-11-07
 

docs/modules/spark-k8s/partials/supported-versions.adoc

@@ -3,11 +3,12 @@
 // Stackable Platform documentation.
 // Please sort the versions in descending order (newest first)
 
-- 4.0.1 (Hadoop 3.4.1, Scala 2.13, Python 3.11, Java 17) (Experimental)
-- 3.5.6 (Hadoop 3.3.4, Scala 2.12, Python 3.11, Java 17) (Deprecated)
-- 3.5.7 (Hadoop 3.3.4, Scala 2.12, Python 3.11, Java 17) (LTS)
+- 4.1.1 (Hadoop 3.4.2, Scala 2.13, Python 3.12, Java 21) (Experimental)
+- 4.0.1 (Hadoop 3.4.2, Scala 2.13, Python 3.12, Java 21)
+- 3.5.7 (Hadoop 3.4.2, Scala 2.12, Python 3.11, Java 17) (LTS)
 
-Some reasons why Spark 4 is considered experimental (as of September 2025):
+Some reasons why Spark 4.1.1 is considered experimental (as of January 2026):
 
 - Missing HBase compatibility (See: https://github.com/apache/hbase-connectors/pull/130)
-- Executors fail to load logging libs (maybe related: https://issues.apache.org/jira/browse/SPARK-52585)
+- No Iceberg Spark runtime release with support for Spark 4.1 available yet.
+- No Delta Lake release with support for Spark 4.1 available yet.

tests/templates/kuttl/delta-lake/40-spark-app.yaml.j2

@@ -42,9 +42,17 @@ spec:
   deps:
     requirements:
       - importlib-metadata
-      - delta-spark=={{ test_scenario['values']['delta'] }}
+{% if test_scenario['values']['spark-delta-lake'].startswith("4") %}
+      - delta-spark==4.0.1
+{% else %}
+      - delta-spark==3.3.2
+{% endif %}
     packages:
-      - io.delta:delta-spark_2.12:{{ test_scenario['values']['delta'] }}
+{% if test_scenario['values']['spark-delta-lake'].startswith("4") %}
+      - io.delta:delta-spark_2.13:4.0.1
+{% else %}
+      - io.delta:delta-spark_2.12:3.3.2
+{% endif %}
   volumes:
     - name: script
       configMap:

tests/templates/kuttl/iceberg/10-deploy-spark-app.yaml.j2

@@ -41,14 +41,11 @@ spec:
           mountPath: /stackable/spark/jobs
   deps:
     packages:
-      #
-      # The iceberg runtime contains the spark and scala versions in the form :
-      #
-      #   <spark major>.<spark minor>_<scala major>.<scala minor>
-      #
-      # We extract the spark parts from the test scenario value.
-      #
-      - org.apache.iceberg:iceberg-spark-runtime-{{ ".".join(test_scenario['values']['spark-iceberg'].split('.')[:2]) }}_2.12:1.8.1
+{% if test_scenario['values']['spark-iceberg'].startswith("4") %}
+      - org.apache.iceberg:iceberg-spark-runtime-{{ ".".join(test_scenario['values']['spark-iceberg'].split('.')[:2]) }}_2.13:1.10.1
+{% else %}
+      - org.apache.iceberg:iceberg-spark-runtime-{{ ".".join(test_scenario['values']['spark-iceberg'].split('.')[:2]) }}_2.12:1.10.1
+{% endif %}
   volumes:
     - name: script
       configMap:

tests/templates/kuttl/logging/08-deploy-automatic-log-config-pyspark-app.yaml.j2

@@ -17,7 +17,7 @@ spec:
   mainApplicationFile: local:///stackable/spark/examples/src/main/python/als.py
   deps:
     requirements:
-      - numpy==1.24.2
+      - numpy==2.4.1
   driver:
     config:
       logging:

tests/templates/kuttl/logging/09-deploy-custom-log-config-pyspark-app.yaml.j2

@@ -34,7 +34,7 @@ spec:
   mainApplicationFile: local:///stackable/spark/examples/src/main/python/als.py
   deps:
     requirements:
-      - numpy==1.24.2
+      - numpy==2.4.1
   driver:
     config:
       logging:

tests/test-definition.yaml

@@ -5,33 +5,44 @@ dimensions:
       - "false"
   - name: spark
     values:
-      - 3.5.6
       - 3.5.7
       - 4.0.1
+      - 4.1.1
       # Alternatively, if you want to use a custom image, append a comma and the full image name to the product version
       # as in the example below.
       # - 3.5.6,oci.stackable.tech/sandbox/spark-k8s:3.5.6-stackable0.0.0-dev
   - name: spark-logging
     values:
       - 3.5.7
+      - 4.0.1
+      - 4.1.1
   - name: spark-hbase-connector
     values:
       - 3.5.7
+      # No hbase-connector release with support for Spark 4 yet.
+      # - 4.0.1
+      # - 4.1.1
   - name: spark-delta-lake
     values:
       - 3.5.7
+      - 4.0.1
+      # No delta-lake release with support for Spark 4.1 yet
+      # - 4.1.1
       # - 3.5.6,oci.stackable.tech/sandbox/spark-k8s:3.5.6-stackable0.0.0-dev
   - name: spark-iceberg
     values:
       - 3.5.7
+      - 4.0.1
+      # No iceberg release with support for Spark 4.1 yet
+      # - 4.1.1
   - name: spark-connect
     values:
       - 3.5.7
       - 4.0.1
+      - 4.1.1
       # - 3.5.6,oci.stackable.tech/sandbox/spark-k8s:3.5.6-stackable0.0.0-dev
   - name: hbase
     values:
-      - 2.6.2
       - 2.6.3
   - name: hdfs-latest
     values:
@@ -46,9 +57,6 @@ dimensions:
     values:
       - "false"
       - "true"
-  - name: delta
-    values:
-      - 3.1.0
 tests:
   - name: smoke
     dimensions:
@@ -102,7 +110,6 @@ tests:
   - name: delta-lake
     dimensions:
       - spark-delta-lake
-      - delta
       - openshift
   - name: hbase-connector
     dimensions: