apache · andygrove · May 7, 2026 · Apr 29, 2026 · Apr 29, 2026 · Apr 29, 2026
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
@@ -74,6 +74,6 @@ jobs:
         with:
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: ghcr.io/apache/datafusion-comet:spark-3.5-scala-2.12-${{ env.COMET_VERSION }}
+          tags: ghcr.io/apache/datafusion-comet:spark-4.1-scala-2.13-${{ env.COMET_VERSION }}
           file: kube/Dockerfile
           no-cache: true
diff --git a/.github/workflows/pr_build_linux.yml b/.github/workflows/pr_build_linux.yml
@@ -451,6 +451,8 @@ jobs:
     runs-on: ${{ github.repository_owner == 'apache' && format('runs-on={0},family=m8a+m7a+c8a,cpu=16,image=ubuntu24-full-x64,extras=s3-cache,disk=large,tag=datafusion-comet', github.run_id) || 'ubuntu-latest' }}
     container:
       image: amd64/rust
+    env:
+      JAVA_TOOL_OPTIONS: --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-exports=java.base/sun.util.calendar=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/sun.nio.cs=ALL-UNNAMED --add-opens=java.base/sun.security.action=ALL-UNNAMED --add-opens=java.base/sun.util.calendar=ALL-UNNAMED
     steps:
       - uses: runs-on/action@742bf56072eb4845a0f94b3394673e4903c90ff0  # v2.1.0
 
@@ -460,7 +462,7 @@ jobs:
         uses: ./.github/actions/setup-builder
         with:
           rust-version: ${{ env.RUST_VERSION }}
-          jdk-version: 11
+          jdk-version: 17
 
       - name: Download native library
         uses: actions/download-artifact@v8
@@ -505,6 +507,8 @@ jobs:
     runs-on: ${{ github.repository_owner == 'apache' && format('runs-on={0},family=m8a+m7a+c8a,cpu=16,image=ubuntu24-full-x64,extras=s3-cache,disk=large,tag=datafusion-comet', github.run_id) || 'ubuntu-latest' }}
     container:
       image: amd64/rust
+    env:
+      JAVA_TOOL_OPTIONS: --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-exports=java.base/sun.util.calendar=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.nio=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED --add-opens=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/sun.nio.cs=ALL-UNNAMED --add-opens=java.base/sun.security.action=ALL-UNNAMED --add-opens=java.base/sun.util.calendar=ALL-UNNAMED
     strategy:
       matrix:
         join: [sort_merge, broadcast, hash]
@@ -518,7 +522,7 @@ jobs:
         uses: ./.github/actions/setup-builder
         with:
           rust-version: ${{ env.RUST_VERSION }}
-          jdk-version: 11
+          jdk-version: 17
 
       - name: Download native library
         uses: actions/download-artifact@v8

diff --git a/docs/source/contributor-guide/benchmarking_aws_ec2.md b/docs/source/contributor-guide/benchmarking_aws_ec2.md
@@ -104,7 +104,7 @@ make release
 Set `COMET_JAR` environment variable.
 
 ```shell
-export COMET_JAR=/home/ec2-user/datafusion-comet/spark/target/comet-spark-spark3.5_2.12-$COMET_VERSION.jar
+export COMET_JAR=/home/ec2-user/datafusion-comet/spark/target/comet-spark-spark4.1_2.13-$COMET_VERSION.jar
 ```
 
 ## Run Benchmarks

diff --git a/docs/source/contributor-guide/benchmarking_macos.md b/docs/source/contributor-guide/benchmarking_macos.md
@@ -55,13 +55,13 @@ export DF_BENCH=`pwd`
 
 ## Install Spark
 
-Install Apache Spark. This example refers to 3.5.4 version.
+Install Apache Spark. This example refers to 4.1.1 version.
 
 ```shell
-wget https://archive.apache.org/dist/spark/spark-3.5.4/spark-3.5.4-bin-hadoop3.tgz
-tar xzf spark-3.5.4-bin-hadoop3.tgz
-sudo mv spark-3.5.4-bin-hadoop3 /opt
-export SPARK_HOME=/opt/spark-3.5.4-bin-hadoop3/
+wget https://archive.apache.org/dist/spark/spark-4.1.1/spark-4.1.1-bin-hadoop3.tgz
+tar xzf spark-4.1.1-bin-hadoop3.tgz
+sudo mv spark-4.1.1-bin-hadoop3 /opt
+export SPARK_HOME=/opt/spark-4.1.1-bin-hadoop3/
 ```
 
 Start Spark in standalone mode:
@@ -129,7 +129,7 @@ make release COMET_FEATURES=mimalloc
 Set `COMET_JAR` to point to the location of the Comet jar file. Example for Comet 0.8
 
 ```shell
-export COMET_JAR=`pwd`/spark/target/comet-spark-spark3.5_2.12-0.8.0-SNAPSHOT.jar
+export COMET_JAR=`pwd`/spark/target/comet-spark-spark4.1_2.13-0.8.0-SNAPSHOT.jar
 ```
 
 Run the following command (the `--data` parameter will need to be updated to point to your S3 bucket):

diff --git a/docs/source/contributor-guide/benchmarking_spark_sql_perf.md b/docs/source/contributor-guide/benchmarking_spark_sql_perf.md
@@ -34,8 +34,8 @@ partitioning and writing to Parquet format automatically.
 
 ## Prerequisites
 
-- Java 17 (for Spark 3.5+)
-- Apache Spark 3.5.x
+- Java 17
+- Apache Spark 4.1.x
 - SBT (Scala Build Tool)
 - C compiler toolchain (`gcc`, `make`, `flex`, `bison`, `byacc`)
 
@@ -225,7 +225,7 @@ Build Comet from source and launch `spark-shell` with both the Comet and spark-s
 
 ```shell
 make release
-export COMET_JAR=$(pwd)/spark/target/comet-spark-spark3.5_2.12-*.jar
+export COMET_JAR=$(pwd)/spark/target/comet-spark-spark4.1_2.13-*.jar
 
 $SPARK_HOME/bin/spark-shell \
     --master $SPARK_MASTER \

diff --git a/docs/source/contributor-guide/debugging.md b/docs/source/contributor-guide/debugging.md
@@ -136,7 +136,7 @@ make release COMET_FEATURES=backtrace
 Set `RUST_BACKTRACE=1` for the Spark worker/executor process, or for `spark-submit` if running in local mode.
 
 ```console
-RUST_BACKTRACE=1 $SPARK_HOME/spark-shell --jars spark/target/comet-spark-spark3.5_2.12-$COMET_VERSION.jar --conf spark.plugins=org.apache.spark.CometPlugin --conf spark.comet.enabled=true --conf spark.comet.exec.enabled=true
+RUST_BACKTRACE=1 $SPARK_HOME/spark-shell --jars spark/target/comet-spark-spark4.1_2.13-$COMET_VERSION.jar --conf spark.plugins=org.apache.spark.CometPlugin --conf spark.comet.enabled=true --conf spark.comet.exec.enabled=true
 ```
 
 Get the expanded exception details

diff --git a/docs/source/contributor-guide/iceberg-spark-tests.md b/docs/source/contributor-guide/iceberg-spark-tests.md
@@ -40,7 +40,7 @@ Here is an overview of the changes that the diffs make to Iceberg:
 Run `make release` in Comet to install the Comet JAR into the local Maven repository, specifying the Spark version.
 
 ```shell
-PROFILES="-Pspark-3.5" make release
+PROFILES="-Pspark-4.1" make release
 ```
 
 ## 2. Clone Iceberg and Apply Diff

diff --git a/docs/source/user-guide/latest/datasources.md b/docs/source/user-guide/latest/datasources.md
@@ -69,12 +69,12 @@ Unlike to native Comet reader the Datafusion reader fully supports nested types
 To build Comet with native DataFusion reader and remote HDFS support it is required to have a JDK installed
 
 Example:
-Build a Comet for `spark-3.5` provide a JDK path in `JAVA_HOME`
+Build a Comet for `spark-4.1` provide a JDK path in `JAVA_HOME`
 Provide the JRE linker path in `RUSTFLAGS`, the path can vary depending on the system. Typically JRE linker is a part of installed JDK
 
 ```shell
-export JAVA_HOME="/opt/homebrew/opt/openjdk@11"
-make release PROFILES="-Pspark-3.5" COMET_FEATURES=hdfs RUSTFLAGS="-L $JAVA_HOME/libexec/openjdk.jdk/Contents/Home/lib/server"
+export JAVA_HOME="/opt/homebrew/opt/openjdk@17"
+make release PROFILES="-Pspark-4.1" COMET_FEATURES=hdfs RUSTFLAGS="-L $JAVA_HOME/libexec/openjdk.jdk/Contents/Home/lib/server"
 ```
 
 Start Comet with experimental reader and HDFS support as [described](installation.md/#run-spark-shell-with-comet-enabled)
@@ -149,7 +149,7 @@ docker compose -f kube/local/hdfs-docker-compose.yml up
 - Build a project with HDFS support
 
 ```shell
-JAVA_HOME="/opt/homebrew/opt/openjdk@11" make release PROFILES="-Pspark-3.5" COMET_FEATURES=hdfs RUSTFLAGS="-L /opt/homebrew/opt/openjdk@11/libexec/openjdk.jdk/Contents/Home/lib/server"
+JAVA_HOME="/opt/homebrew/opt/openjdk@17" make release PROFILES="-Pspark-4.1" COMET_FEATURES=hdfs RUSTFLAGS="-L /opt/homebrew/opt/openjdk@17/libexec/openjdk.jdk/Contents/Home/lib/server"
 ```
 
 - Run local test

diff --git a/docs/source/user-guide/latest/iceberg.md b/docs/source/user-guide/latest/iceberg.md
@@ -31,7 +31,7 @@ reader is enabled by default. To disable it, set `spark.comet.scan.icebergNative
 
 ```shell
 $SPARK_HOME/bin/spark-shell \
-    --packages org.apache.datafusion:comet-spark-spark3.5_2.12:0.14.0,org.apache.iceberg:iceberg-spark-runtime-3.5_2.12:1.8.1,org.apache.iceberg:iceberg-core:1.8.1 \
+    --packages org.apache.datafusion:comet-spark-spark4.1_2.13:0.14.0,org.apache.iceberg:iceberg-spark-runtime-3.5_2.12:1.8.1,org.apache.iceberg:iceberg-core:1.8.1 \
     --repositories https://repo1.maven.org/maven2/ \
     --conf spark.sql.extensions=org.apache.iceberg.spark.extensions.IcebergSparkSessionExtensions \
     --conf spark.sql.catalog.spark_catalog=org.apache.iceberg.spark.SparkCatalog \
@@ -106,7 +106,7 @@ configure Spark to use a REST catalog with Comet's native Iceberg scan:
 
 ```shell
 $SPARK_HOME/bin/spark-shell \
-    --packages org.apache.datafusion:comet-spark-spark3.5_2.12:0.14.0,org.apache.iceberg:iceberg-spark-runtime-3.5_2.12:1.8.1,org.apache.iceberg:iceberg-core:1.8.1 \
+    --packages org.apache.datafusion:comet-spark-spark4.1_2.13:0.14.0,org.apache.iceberg:iceberg-spark-runtime-3.5_2.12:1.8.1,org.apache.iceberg:iceberg-core:1.8.1 \
     --repositories https://repo1.maven.org/maven2/ \
     --conf spark.sql.extensions=org.apache.iceberg.spark.extensions.IcebergSparkSessionExtensions \
     --conf spark.sql.catalog.rest_cat=org.apache.iceberg.spark.SparkCatalog \

diff --git a/docs/source/user-guide/latest/installation.md b/docs/source/user-guide/latest/installation.md
@@ -85,7 +85,7 @@ Here are the direct links for downloading the Comet $COMET_VERSION jar file.
 - [Comet plugin for Spark 3.5 / Scala 2.12](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark3.5_2.12/$COMET_VERSION/comet-spark-spark3.5_2.12-$COMET_VERSION.jar)
 - [Comet plugin for Spark 3.5 / Scala 2.13](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark3.5_2.13/$COMET_VERSION/comet-spark-spark3.5_2.13-$COMET_VERSION.jar)
 - [Comet plugin for Spark 4.0 / Scala 2.13](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark4.0_2.13/$COMET_VERSION/comet-spark-spark4.0_2.13-$COMET_VERSION.jar)
-- [Comet plugin for Spark 4.1 / Scala 2.13 (Experimental)](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark4.1_2.13/$COMET_VERSION/comet-spark-spark4.1_2.13-$COMET_VERSION.jar)
+- [Comet plugin for Spark 4.1 / Scala 2.13](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark4.1_2.13/$COMET_VERSION/comet-spark-spark4.1_2.13-$COMET_VERSION.jar)
 - [Comet plugin for Spark 4.2 / Scala 2.13 (Experimental)](https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark4.2_2.13/$COMET_VERSION/comet-spark-spark4.2_2.13-$COMET_VERSION.jar)
 <!-- ENDIF -->
 
@@ -105,7 +105,7 @@ See the [Comet Kubernetes Guide](kubernetes.md) guide.
 Make sure `SPARK_HOME` points to the same Spark version as Comet was built for.
 
 ```shell
-export COMET_JAR=spark/target/comet-spark-spark3.5_2.12-$COMET_VERSION.jar
+export COMET_JAR=spark/target/comet-spark-spark4.1_2.13-$COMET_VERSION.jar
 
 $SPARK_HOME/bin/spark-shell \
     --jars $COMET_JAR \
@@ -161,7 +161,7 @@ explicitly contain Comet otherwise Spark may use a different class-loader for th
 components which will then fail at runtime. For example:
 
 ```
---driver-class-path spark/target/comet-spark-spark3.5_2.12-$COMET_VERSION.jar
+--driver-class-path spark/target/comet-spark-spark4.1_2.13-$COMET_VERSION.jar
 ```
 
 Some cluster managers may require additional configuration, see <https://spark.apache.org/docs/latest/cluster-overview.html>

diff --git a/docs/source/user-guide/latest/kubernetes.md b/docs/source/user-guide/latest/kubernetes.md
@@ -69,30 +69,30 @@ metadata:
 spec:
   type: Scala
   mode: cluster
-  image: apache/datafusion-comet:0.7.0-spark3.5.5-scala2.12-java11
+  image: apache/datafusion-comet:0.7.0-spark4.1.1-scala2.13-java17
   imagePullPolicy: IfNotPresent
   mainClass: org.apache.spark.examples.SparkPi
-  mainApplicationFile: local:///opt/spark/examples/jars/spark-examples_2.12-3.5.5.jar
+  mainApplicationFile: local:///opt/spark/examples/jars/spark-examples_2.13-4.1.1.jar
   sparkConf:
-    "spark.executor.extraClassPath": "/opt/spark/jars/comet-spark-spark3.5_2.12-0.7.0.jar"
-    "spark.driver.extraClassPath": "/opt/spark/jars/comet-spark-spark3.5_2.12-0.7.0.jar"
+    "spark.executor.extraClassPath": "/opt/spark/jars/comet-spark-spark4.1_2.13-0.7.0.jar"
+    "spark.driver.extraClassPath": "/opt/spark/jars/comet-spark-spark4.1_2.13-0.7.0.jar"
     "spark.plugins": "org.apache.spark.CometPlugin"
     "spark.comet.enabled": "true"
     "spark.comet.exec.enabled": "true"
     "spark.comet.exec.shuffle.enabled": "true"
     "spark.comet.exec.shuffle.mode": "auto"
     "spark.shuffle.manager": "org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager"
-  sparkVersion: 3.5.6
+  sparkVersion: 4.1.1
   driver:
     labels:
-      version: 3.5.6
+      version: 4.1.1
     cores: 1
     coreLimit: 1200m
     memory: 512m
     serviceAccount: spark-operator-spark
   executor:
     labels:
-      version: 3.5.6
+      version: 4.1.1
     instances: 1
     cores: 1
     coreLimit: 1200m

diff --git a/docs/source/user-guide/latest/source.md b/docs/source/user-guide/latest/source.md
@@ -38,7 +38,7 @@ cd apache-datafusion-comet-$COMET_VERSION
 Build
 
 ```console
-make release-nogit PROFILES="-Pspark-3.5"
+make release-nogit PROFILES="-Pspark-4.1"
 ```
 
 ## Building from the GitHub repository
@@ -53,17 +53,17 @@ Build Comet for a specific Spark version:
 
 ```console
 cd datafusion-comet
-make release PROFILES="-Pspark-3.5"
+make release PROFILES="-Pspark-4.1"
 ```
 
-Note that the project builds for Scala 2.12 by default but can be built for Scala 2.13 using an additional profile:
+Note that the project builds for Scala 2.13 by default but can be built for Scala 2.12 using an additional profile:
 
 ```console
-make release PROFILES="-Pspark-3.5 -Pscala-2.13"
+make release PROFILES="-Pspark-3.5 -Pscala-2.12"
 ```
 
 To build Comet from the source distribution on an isolated environment without an access to `github.com` it is necessary to disable `git-commit-id-maven-plugin`, otherwise you will face errors that there is no access to the git during the build process. In that case you may use:
 
 ```console
-make release-nogit PROFILES="-Pspark-3.5"
+make release-nogit PROFILES="-Pspark-4.1"
 ```
diff --git a/kube/Dockerfile b/kube/Dockerfile
@@ -15,14 +15,14 @@
 # limitations under the License.
 #
 
-FROM apache/spark:3.5.8 AS builder
+FROM apache/spark:4.1.1 AS builder
 
 USER root
 
-# Installing JDK11 as the image comes with JRE
+# Installing JDK17 as the image comes with JRE
 RUN apt update \
     && apt install -y curl \
-    && apt install -y openjdk-11-jdk \
+    && apt install -y openjdk-17-jdk \
     && apt clean
 
 RUN apt install -y gcc-10 g++-10 cpp-10 unzip
@@ -37,8 +37,8 @@ ENV PATH="$PATH:/root/.local/bin"
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 ENV RUSTFLAGS="-C debuginfo=line-tables-only -C incremental=false"
-ENV SPARK_VERSION=3.5
-ENV SCALA_VERSION=2.12
+ENV SPARK_VERSION=4.1
+ENV SCALA_VERSION=2.13
 
 # copy source files to Docker image
 RUN mkdir /comet
@@ -70,9 +70,9 @@ RUN mkdir -p /root/.m2 && \
 RUN cd /comet \
     && JAVA_HOME=$(readlink -f $(which javac) | sed "s/\/bin\/javac//") make release-nogit PROFILES="-Pspark-$SPARK_VERSION -Pscala-$SCALA_VERSION"
 
-FROM apache/spark:3.5.8
-ENV SPARK_VERSION=3.5
-ENV SCALA_VERSION=2.12
+FROM apache/spark:4.1.1
+ENV SPARK_VERSION=4.1
+ENV SCALA_VERSION=2.13
 USER root
 
 # note the use of a wildcard in the file name so that this works with both snapshot and final release versions