andygrove commented on issue #182:
URL:
https://github.com/apache/datafusion-comet/issues/182#issuecomment-2113153281
The issue is that we need to specify extra classpath. This resolved it for
me:
```shell
export COMET_JAR=spark/target/comet-spark-spark3.4_2.12-0.1.0-SNAPSHOT.jar
$SPARK_HOME/bin/spark-shell \
--jars $COMET_JAR \
--conf spark.sql.extensions=org.apache.comet.CometSparkSessionExtensions
\
--conf spark.comet.enabled=true \
--conf spark.comet.exec.enabled=true \
--conf spark.comet.exec.all.enabled=true \
--conf spark.comet.explainFallback.enabled=true \
--conf spark.driver.extraClassPath=$COMET_JAR \
--conf spark.executor.extraClassPath=$COMET_JAR
```
The difference was adding these two lines:
```
--conf spark.driver.extraClassPath=$COMET_JAR \
--conf spark.executor.extraClassPath=$COMET_JAR
```
I will create a PR to update the user guide, where I copied the spark-shell
command from.
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