[doc] Add Spark 4.0 compatibility warning for JVM packages#12136
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Spark 4.0.0 has a binary incompatibility in `org.apache.spark.ml.param.Param` (SPARK-52259) that breaks all third-party ML libraries including XGBoost4J-Spark. The issue is fixed in Spark 4.0.1 and 4.1.0. Add warnings to the Spark tutorial and migration guide so users know to avoid Spark 4.0.0 and upgrade to at least Spark 4.0.1. Made-with: Cursor
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I think a simple troubleshooting note should be sufficient |
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Hi @trivialfis, I didn't see there's a troubleshooting section, where do you suggest to add? |
trivialfis
approved these changes
Apr 21, 2026
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Summary
doc/jvm/xgboost4j_spark_tutorial.rst) about Spark 4.0.0 binary incompatibilitydoc/jvm/xgboost_spark_migration.rst)Context
Apache Spark 4.0.0 introduced a breaking change to
org.apache.spark.ml.param.Paramconstructor (SPARK-52259), which causesNoSuchMethodErrorwhen instantiating any XGBoost estimator (e.g.,XGBoostClassifier,XGBoostRegressor). This affects all third-party ML libraries that useParam.Test results:
NoSuchMethodErroronParamconstructorThe upstream fix is included in Spark 4.0.1 (released 2025-09-02) and Spark 4.1.0. XGBoost4J-Spark JARs built against Spark 3.5 work on Spark 4.0.1+ without any code changes.
This PR adds documentation warnings so users know to avoid Spark 4.0.0 and use Spark 4.0.1 or later.
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