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new 4f4a4365557e [SPARK-56834][K8S] Use Java `25-jre` instead of `21-jre`
image in K8s Dockerfile
4f4a4365557e is described below
commit 4f4a4365557e3da3912241f568ddec9f0e51cd48
Author: Dongjoon Hyun <[email protected]>
AuthorDate: Tue May 12 11:21:43 2026 -0700
[SPARK-56834][K8S] Use Java `25-jre` instead of `21-jre` image in K8s
Dockerfile
### What changes were proposed in this pull request?
This PR aims to use Java 25 image in the Spark K8s Dockerfile.
### Why are the changes needed?
As a part of [SPARK-51167 Build and Run Spark on Java
25](https://issues.apache.org/jira/browse/SPARK-51167), this PR uses the latest
LTS Java release as the default JVM docker base image in Apache Spark 4.2.0.
- apache/spark#55798
- apache/spark#55827
### Does this PR introduce _any_ user-facing change?
- Yes because the default Java version is changed.
- However, a user still change this back via `-b java_image_tag=17` and the
Apache Spark 4.2.0 provides the same capability for Java 17/21/25.
### How was this patch tested?
Manual review.
### Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Code (Opus 4.7)
Closes #55829 from dongjoon-hyun/SPARK-56834.
Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>
(cherry picked from commit 7a01891b31ea95ca4d4266947099d11cd7f5ddf5)
Signed-off-by: Dongjoon Hyun <[email protected]>
---
.../kubernetes/docker/src/main/dockerfiles/spark/Dockerfile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
b/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
index 84cba5568d27..4af2359237d3 100644
--- a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
+++ b/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
@@ -15,7 +15,7 @@
# limitations under the License.
#
ARG java_image_name=azul/zulu-openjdk
-ARG java_image_tag=21-jre
+ARG java_image_tag=25-jre
FROM ${java_image_name}:${java_image_tag}
LABEL org.opencontainers.image.authors="Apache Spark project
<[email protected]>"
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