Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/18555#discussion_r126273432 --- Diff: core/src/main/scala/org/apache/spark/internal/config/package.scala --- @@ -51,29 +63,66 @@ package object config { ConfigBuilder(SparkLauncher.EXECUTOR_EXTRA_LIBRARY_PATH).stringConf.createOptional private[spark] val EXECUTOR_USER_CLASS_PATH_FIRST = - ConfigBuilder("spark.executor.userClassPathFirst").booleanConf.createWithDefault(false) + ConfigBuilder("spark.executor.userClassPathFirst") + .doc("Same functionality as spark.driver.userClassPathFirst, " + + "but applied to executor instances.") + .booleanConf + .checkValues(Set(false, true)) + .createWithDefault(false) private[spark] val EXECUTOR_MEMORY = ConfigBuilder("spark.executor.memory") + .doc("Amount of memory to use per executor process (e.g. 2g, 8g).") .bytesConf(ByteUnit.MiB) + .checkValue(v => v > 0 && v <= Int.MaxValue / (1024 * 1024), + "The executor memory must be greater than 0M " + + s"and less than ${Int.MaxValue / (1024 * 1024)}M.") .createWithDefaultString("1g") - private[spark] val IS_PYTHON_APP = ConfigBuilder("spark.yarn.isPython").internal() - .booleanConf.createWithDefault(false) + private[spark] val IS_PYTHON_APP = ConfigBuilder("spark.yarn.isPython") + .internal() + .booleanConf + .checkValues(Set(false, true)) --- End diff -- ditto
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