[GitHub] spark pull request: Update SQLConf.scala

[aarondav]

Github user aarondav commented on a diff in the pull request:

    https://github.com/apache/spark/pull/1272#discussion_r14391342
  
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala ---
    @@ -64,20 +65,21 @@ trait SQLConf {
       }
     
       def get(key: String): String = {
    -    if (!settings.containsKey(key)) {
    -      throw new NoSuchElementException(key)
    -    }
         settings.get(key)
       }
     
       def get(key: String, defaultValue: String): String = {
    -    if (!settings.containsKey(key)) defaultValue else settings.get(key)
    +    settings.synchronized {
    +      if (!settings.containsKey(key)) defaultValue else settings.get(key)
    +    }
       }
     
       def getAll: Array[(String, String)] = settings.asScala.toArray
     
       def getOption(key: String): Option[String] = {
    -    if (!settings.containsKey(key)) None else Some(settings.get(key))
    +    settings.synchronized {
    +      if (!settings.containsKey(key)) None else Some(settings.get(key))
    --- End diff --
    
    Similarly, here, just 
    
    ```scala
    Option(settings.get(key))
    ```


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