Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/18555#discussion_r126329325 --- Diff: core/src/main/scala/org/apache/spark/internal/config/package.scala --- @@ -51,29 +62,61 @@ 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 + .createWithDefault(false) private[spark] val EXECUTOR_MEMORY = ConfigBuilder("spark.executor.memory") + .doc("Amount of memory to use per executor process (e.g. 512, 1g, 2g, 8g).") .bytesConf(ByteUnit.MiB) + .checkValue(v => v > 0 && v <= Long.MaxValue / (1024 * 1024), + "The executor memory must be greater than 0 MiB " + + s"and less than ${Long.MaxValue / (1024 * 1024)} MiB.") .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 + .createWithDefault(false) - private[spark] val CPUS_PER_TASK = ConfigBuilder("spark.task.cpus").intConf.createWithDefault(1) + private[spark] val CPUS_PER_TASK = ConfigBuilder("spark.task.cpus") + .doc("Number of cores to allocate for each task. ") + .intConf + .checkValue(_ > 0, + "Number of cores to allocate for task event queue must not be negative") + .createWithDefault(1) private[spark] val DYN_ALLOCATION_MIN_EXECUTORS = - ConfigBuilder("spark.dynamicAllocation.minExecutors").intConf.createWithDefault(0) + ConfigBuilder("spark.dynamicAllocation.minExecutors") + .doc("Lower bound for the number of executors if dynamic allocation is enabled.") + .intConf --- End diff -- Also, it would be great if you check the error message of the exception.
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