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new 6eeae6d [SPARK-54658] Add `Apache DataFusion Comet` example
6eeae6d is described below
commit 6eeae6d09f2348fa93b5fe35cc49349ec7d111f4
Author: Dongjoon Hyun <[email protected]>
AuthorDate: Tue Dec 9 17:28:02 2025 -0800
[SPARK-54658] Add `Apache DataFusion Comet` example
### What changes were proposed in this pull request?
This PR aims to add `Apache DataFusion Comet` example.
### Why are the changes needed?
To illustrate how to accelerate Apache Spark via Comet project.
### Does this PR introduce _any_ user-facing change?
No behavior change.
### How was this patch tested?
Manually.
```
$ kubectl apply -f examples/pi-with-comet.yaml
$ kubectl logs -f pi-with-comet-0-driver | grep Comet
Defaulted container "spark-kubernetes-driver" out of:
spark-kubernetes-driver, download-comet (init)
25/12/10 00:51:32 INFO CometDriverPlugin: CometDriverPlugin init
25/12/10 00:51:32 INFO CometDriverPlugin: Setting
spark.sql.extensions=org.apache.comet.CometSparkSessionExtensions
25/12/10 00:51:32 INFO CometDriverPlugin: Comet is running in unified
memory mode and sharing off-heap memory with Spark
25/12/10 00:51:32 INFO DriverPluginContainer: Initialized driver component
for plugin org.apache.spark.CometPlugin.
25/12/10 00:51:40 INFO CometDriverPlugin: CometDriverPlugin shutdown
$ kubectl get sparkapp
NAME CURRENT STATE AGE
pi-with-comet ResourceReleased 39s
```
### Was this patch authored or co-authored using generative AI tooling?
No.
Closes #421 from dongjoon-hyun/SPARK-54658.
Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>
---
examples/pi-with-comet.yaml | 86 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/examples/pi-with-comet.yaml b/examples/pi-with-comet.yaml
new file mode 100644
index 0000000..ac7c3cb
--- /dev/null
+++ b/examples/pi-with-comet.yaml
@@ -0,0 +1,86 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+apiVersion: spark.apache.org/v1
+kind: SparkApplication
+metadata:
+ name: pi-with-comet
+spec:
+ mainClass: "org.apache.spark.examples.SparkPi"
+ jars: "local:///opt/spark/examples/jars/spark-examples.jar"
+ sparkConf:
+ spark.comet.enabled: "true"
+ spark.comet.exec.enabled: "true"
+ spark.comet.exec.shuffle.enabled: "true"
+ spark.comet.exec.shuffle.mode: "auto"
+ spark.driver.extraClassPath: "local:///comet/comet.jar"
+ spark.dynamicAllocation.enabled: "true"
+ spark.dynamicAllocation.maxExecutors: "3"
+ spark.dynamicAllocation.shuffleTracking.enabled: "true"
+ spark.executor.extraClassPath: "local:///comet/comet.jar"
+ spark.kubernetes.authenticate.driver.serviceAccountName: "spark"
+ spark.kubernetes.container.image: "apache/spark:3.5.7-java17"
+ spark.kubernetes.driver.pod.excludedFeatureSteps:
"org.apache.spark.deploy.k8s.features.KerberosConfDriverFeatureStep"
+ spark.memory.offHeap.enabled: "true"
+ spark.memory.offHeap.size: "1g"
+ spark.plugins: "org.apache.spark.CometPlugin"
+ spark.shuffle.manager":
"org.apache.spark.sql.comet.execution.shuffle.CometShuffleManager"
+ applicationTolerations:
+ resourceRetainPolicy: OnFailure
+ driverSpec:
+ podTemplateSpec:
+ spec:
+ initContainers:
+ - name: download-comet
+ image: busybox
+ command: ["sh", "-c"]
+ args:
+ - |
+ wget -O /comet/comet.jar
"https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark3.5_2.12/0.12.0/comet-spark-spark3.5_2.12-0.12.0.jar";
+ volumeMounts:
+ - name: comet
+ mountPath: /comet
+ containers:
+ - name: spark-kubernetes-driver
+ volumeMounts:
+ - name: comet
+ mountPath: /comet
+ volumes:
+ - name: comet
+ emptyDir:
+ sizeLimit: 100Mi
+ executorSpec:
+ podTemplateSpec:
+ spec:
+ initContainers:
+ - name: download-comet
+ image: busybox
+ command: ["sh", "-c"]
+ args:
+ - |
+ wget -O /comet/comet.jar
"https://repo1.maven.org/maven2/org/apache/datafusion/comet-spark-spark3.5_2.12/0.12.0/comet-spark-spark3.5_2.12-0.12.0.jar";
+ volumeMounts:
+ - name: comet
+ mountPath: /comet
+ containers:
+ - name: spark-kubernetes-executor
+ volumeMounts:
+ - name: comet
+ mountPath: /comet
+ volumes:
+ - name: comet
+ emptyDir:
+ sizeLimit: 100Mi
+ runtimeVersions:
+ sparkVersion: "3.5.7"
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