[SPARK-53084][CORE] Supplement default GC options in SparkContext initialization

core/src/main/scala/org/apache/spark/SparkContext.scala

@@ -432,6 +432,7 @@ class SparkContext(config: SparkConf) extends Logging {
 
     SparkContext.supplementJavaModuleOptions(_conf)
     SparkContext.supplementJavaIPv6Options(_conf)
+    SparkContext.supplementJavaGCOptions(_conf)
 
     _driverLogger = DriverLogger(_conf)
 
@@ -3435,6 +3436,22 @@ object SparkContext extends Logging {
     supplement(DRIVER_JAVA_OPTIONS)
     supplement(EXECUTOR_JAVA_OPTIONS)
   }
+
+  private def supplementJavaGCOptions(conf: SparkConf): Unit = {
+    def supplement(key: OptionalConfigEntry[String]): Unit = {
+      conf.get(key).foreach { opts =>
+        val hasGCAlgorithm = opts.split("\\s+").exists { option =>
+          option.startsWith("-XX:+Use") && option.endsWith("GC")
+        }
+        if (!hasGCAlgorithm) {
+          conf.set(key.key, s"-XX:+UseParallelGC $opts")
+        }
+      }
+    }
+
+    supplement(DRIVER_JAVA_OPTIONS)
+    supplement(EXECUTOR_JAVA_OPTIONS)
+  }
 }
 
 /**

core/src/test/scala/org/apache/spark/SparkContextSuite.scala

@@ -42,6 +42,7 @@ import org.apache.spark.executor.ExecutorExitCode
 import org.apache.spark.internal.config._
 import org.apache.spark.internal.config.Tests._
 import org.apache.spark.internal.config.UI._
+import org.apache.spark.launcher.SparkLauncher
 import org.apache.spark.resource.ResourceAllocation
 import org.apache.spark.resource.ResourceUtils._
 import org.apache.spark.resource.TestResourceIDs._
@@ -1469,6 +1470,27 @@ class SparkContextSuite extends SparkFunSuite with LocalSparkContext with Eventu
     sc.stop()
   }
 
+  test("SPARK-53084: Supplement UseParallelGC when GC algorithm is not specified") {
+    val conf = new SparkConf().setAppName("test").setMaster("local")
+    sc = new SparkContext(conf)
+    val driverJavaOptions = sc.conf.get(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS)
+    assert(driverJavaOptions.contains("-XX:+UseParallelGC"))
+    val executorJavaOptions = sc.getConf.get(EXECUTOR_JAVA_OPTIONS).get
+    assert(executorJavaOptions.contains("-XX:+UseParallelGC"))
+  }
+
+  test("SPARK-53084: Do not supplement UseParallelGC when GC algorithm is specified") {
+    val conf = new SparkConf().setAppName("test").setMaster("local")
+      .set(SparkLauncher.DRIVER_DEFAULT_JAVA_OPTIONS, "-XX:+UseG1GC")
+      .set(SparkLauncher.EXECUTOR_DEFAULT_JAVA_OPTIONS, "-XX:+UseC4GC")
+    sc = new SparkContext(conf)
+    val driverJavaOptions = sc.conf.get(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS)
+    assert(driverJavaOptions.contains("-XX:+UseG1GC"))
+    assert(!driverJavaOptions.contains("-XX:+UseParallelGC"))
+    val executorJavaOptions = sc.getConf.get(EXECUTOR_JAVA_OPTIONS).get
+    assert(executorJavaOptions.contains("-XX:+UseC4GC"))
+    assert(!driverJavaOptions.contains("-XX:+UseParallelGC"))
+  }
 }
 
 object SparkContextSuite {