Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/4143#discussion_r23336095
--- Diff: core/src/main/scala/org/apache/spark/SparkConf.scala ---
@@ -46,7 +46,7 @@ class SparkConf(loadDefaults: Boolean) extends Cloneable
with Logging {
/** Create a SparkConf that loads defaults from system properties and
the classpath */
def this() = this(true)
- private[spark] val settings = new HashMap[String, String]()
+ private[spark] val settings = new HashMap[String, String] with
SynchronizedMap[String, String]
--- End diff --
Then which one do you suggest?
We also hit a bug related to java.util.ConcurrentMap recently. Should we
use TrieMap ? Actually I tried it at first, but not sure what's quality it has,
the follow the docs here:
http://docs.scala-lang.org/overviews/collections/maps.html
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