[SPARK-53787] Upgrade Spark to 4.1.0-preview2
#364
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peter-toth
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Oct 2, 2025
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Thank you, @peter-toth . After upgrading, I'm planning to test new Spark 4.1.0 features like the following. |
dongjoon-hyun
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4.1.0-preview2
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Merged to main. |
dongjoon-hyun
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Oct 9, 2025
…usage example ### What changes were proposed in this pull request? This PR aims to add `spark.kubernetes.driver.pod.excludedFeatureSteps` usage example. ### Why are the changes needed? Since `Apache Spark K8s Operator v0.6.0`, we can use new features from `Apache Spark 4.1.0-preview2`. - #364 For example, `spark.kubernetes.driver.pod.excludedFeatureSteps` allows us to skip the specific feature steps. If we set the following, we can skip `KerberosConfDriverFeatureStep` which fails always on Java 25 environment currently. - apache/spark#51522 ``` spark.kubernetes.driver.pod.excludedFeatureSteps: "org.apache.spark.deploy.k8s.features.KerberosConfDriverFeatureStep" ``` **BEFORE** ``` 25/10/09 04:22:23 INFO pi-preview default o.a.s.i.Logging You have not specified a krb5.conf file locally or via a ConfigMap. Make sure that you have the krb5.conf locally on the driver image. WARNING: A restricted method in java.lang.System has been called WARNING: java.lang.System::loadLibrary has been called by org.apache.hadoop.util.NativeCodeLoader in an unnamed module (file:/opt/spark-operator/operator/spark-kubernetes-operator.jar) WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module WARNING: Restricted methods will be blocked in a future release unless native access is enabled 25/10/09 04:22:23 WARN pi-preview default o.a.h.u.NativeCodeLoader Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 25/10/09 04:22:23 WARN pi-preview default o.a.s.i.Logging Fail to get credentials java.lang.UnsupportedOperationException: getSubject is not supported at java.base/javax.security.auth.Subject.getSubject(Subject.java:277) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:588) at org.apache.spark.deploy.k8s.features.KerberosConfDriverFeatureStep.liftedTree1$1(KerberosConfDriverFeatureStep.scala:95) ``` **AFTER** ``` 25/10/09 04:20:34 INFO pi-preview default o.a.s.i.Logging You have not specified a krb5.conf file locally or via a ConfigMap. Make sure that you have the krb5.conf locally on the driver image. ``` ### Does this PR introduce _any_ user-facing change? No. This is an example update. ### How was this patch tested? Manual review. ### Was this patch authored or co-authored using generative AI tooling? No. Closes #379 from dongjoon-hyun/SPARK-53852. Authored-by: Dongjoon Hyun <[email protected]> Signed-off-by: Dongjoon Hyun <[email protected]>
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What changes were proposed in this pull request?
This PR aims to upgrade Spark to
4.1.0-preview2for4.0.1.Why are the changes needed?
Since Apache Spark 4.1.0 is planned next month, we had better prepare to use new features via using
4.1.0-preview2(September) and4.1.0-preview2 (October)gradually.spark.kubernetes.(driver|executor).pod.excludedFeatureStepsspark#51522Spark Connectport to Spark Driver pod and service spark#50925Does this PR introduce any user-facing change?
No behavior change.
How was this patch tested?
Pass the CIs.
Was this patch authored or co-authored using generative AI tooling?
No.