Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/2516#discussion_r18003337
--- Diff:
core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala ---
@@ -406,22 +413,166 @@ private[spark] class SparkSubmitArguments(args:
Seq[String]) {
}
}
+
object SparkSubmitArguments {
- /** Load properties present in the given file. */
- def getPropertiesFromFile(file: File): Seq[(String, String)] = {
- require(file.exists(), s"Properties file $file does not exist")
- require(file.isFile(), s"Properties file $file is not a normal file")
- val inputStream = new FileInputStream(file)
- try {
- val properties = new Properties()
- properties.load(inputStream)
- properties.stringPropertyNames().toSeq.map(k => (k,
properties(k).trim))
- } catch {
- case e: IOException =>
- val message = s"Failed when loading Spark properties file $file"
- throw new SparkException(message, e)
- } finally {
- inputStream.close()
+ /**
+ * Resolves Configuration sources in order of highest to lowest
+ * 1. Each map passed in as additionalConfig from first to last
+ * 2. Environment variables (including legacy variable mappings)
+ * 3. System config variables (eg by using -Dspark.var.name)
+ * 4 SPARK_DEFAULT_CONF/spark-defaults.conf or
SPARK_HOME/conf/spark-defaults.conf
+ * 5. hard coded defaults in class path at spark-submit-defaults.prop
+ *
+ * A property file specified by one of the means listed above gets read
in and the properties are
+ * considered to be at the priority of the method that specified the
files.
+ * A property specified in a property file will not override an existing
+ * config value at that same level
+ *
+ * @param additionalConfigs additional Map[ConfigName->ConfigValue] in
order of highest
+ * priority to lowest
+ * @return Map[propName->propFile] containing values merged from all
sources in order of priority
+ */
+ def mergeSparkProperties(additionalConfigs: Vector[Map[String,String]])
= {
+
+ // Configuration read in from spark-submit-defaults.prop file found on
the classpath
+ val is = Option(Thread.currentThread().getContextClassLoader()
+ .getResourceAsStream(SparkSubmitDefaults))
+
+ val hardCodedDefaultConfig = is.flatMap{x =>
--- End diff --
Space after `{`. Also, you can just use plain `map`.
---
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