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new 5a2de5b [SPARK-53851] Set `io.netty.noUnsafe` to `true` to avoid
JEP-498 warnings
5a2de5b is described below
commit 5a2de5b2dca41467df9316ed96d24a8ac96afeee
Author: Dongjoon Hyun <[email protected]>
AuthorDate: Wed Oct 8 23:58:48 2025 -0700
[SPARK-53851] Set `io.netty.noUnsafe` to `true` to avoid JEP-498 warnings
### What changes were proposed in this pull request?
This PR aims to set `io.netty.noUnsafe` to `true` to avoid JEP-498 warnings.
### Why are the changes needed?
Java 24 has started to print warnings when `sub.misc.Unsafe` is used to
access memory.
- https://openjdk.org/jeps/498
Since Netty 4.1.120.Final, we can use `io.netty.noUnsafe` setting.
- https://github.com/netty/netty/pull/14943
### Does this PR introduce _any_ user-facing change?
No behavior change.
### How was this patch tested?
Manually tests.
**BEFORE**
```
Starting Operator...
WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::allocateMemory has been called by
io.netty.util.internal.PlatformDependent0$2
(file:/opt/spark-operator/operator/spark-kubernetes-operator.jar)
WARNING: Please consider reporting this to the maintainers of class
io.netty.util.internal.PlatformDependent0$2
WARNING: sun.misc.Unsafe::allocateMemory will be removed in a future release
25/10/09 03:35:46 INFO o.a.s.k.o.SparkOperator Configuring operator with
50 reconciliation threads.
```
**AFTER**
```
Starting Operator...
25/10/09 03:32:21 INFO o.a.s.k.o.SparkOperator Configuring operator with
50 reconciliation threads.
```
### Was this patch authored or co-authored using generative AI tooling?
No.
Closes #378 from dongjoon-hyun/SPARK-53851.
Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>
---
build-tools/helm/spark-kubernetes-operator/values.yaml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/build-tools/helm/spark-kubernetes-operator/values.yaml
b/build-tools/helm/spark-kubernetes-operator/values.yaml
index a1180dd..af6504b 100644
--- a/build-tools/helm/spark-kubernetes-operator/values.yaml
+++ b/build-tools/helm/spark-kubernetes-operator/values.yaml
@@ -41,7 +41,7 @@ operatorDeployment:
#
https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/
topologySpreadConstraints: [ ]
operatorContainer:
- jvmArgs: "-Dfile.encoding=UTF8 -XX:+ExitOnOutOfMemoryError
-XX:+UseParallelGC -XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80"
+ jvmArgs: "-Dfile.encoding=UTF8 -XX:+ExitOnOutOfMemoryError
-XX:+UseParallelGC -XX:InitialRAMPercentage=80 -XX:MaxRAMPercentage=80
-Dio.netty.noUnsafe=true"
env:
- name: "SPARK_USER"
value: "spark"
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