dongjoon-hyun commented on PR #52678:
URL: https://github.com/apache/spark/pull/52678#issuecomment-3437888266
I manually verified. Merged to master for Apache Spark 4.1.0-preview3.
```
$ bin/spark-shell --conf "spark.driver.extraJavaOptions=-XX:+UseShenandoahGC"
WARNING: Using incubator modules: jdk.incubator.vector
Using Spark's default log4j profile:
org/apache/spark/log4j2-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use
setLogLevel(newLevel).
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 4.1.0-SNAPSHOT
/_/
Using Scala version 2.13.17 (OpenJDK 64-Bit Server VM, Java 21.0.8)
Type in expressions to have them evaluated.
Type :help for more information.
25/10/23 09:11:40 WARN NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
Spark context Web UI available at http://localhost:4040
Spark context available as 'sc' (master = local[*], app id =
local-1761235900588).
Spark session available as 'spark'.
scala> org.apache.spark.util.Utils.isG1GC
val res0: Boolean = false
scala> org.apache.spark.util.Utils.isZGC
val res1: Boolean = false
scala> org.apache.spark.util.Utils.isShenandoahGC
val res2: Boolean = true
```
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