Add a config option to print DAG.

Add a config option "spark.rddDebug.enable" to check whether to print DAG info. When "spark.rddDebug.enable" is true, it will print information about DAG in the log. Author: KaiXinXiaoLei <[email protected]> Closes #4257 from KaiXinXiaoLei/DAGprint and squashes the following commits: d9fe42e [KaiXinXiaoLei] change log info c27ee76 [KaiXinXiaoLei] change log info 83c2b32 [KaiXinXiaoLei] change config option adcb14f [KaiXinXiaoLei] change the file. f4e7b9e [KaiXinXiaoLei] add a option to print DAG
apache · Feb 10, 2015 · 31d435e · 31d435e
1 parent 08488c1
commit 31d435e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1420,6 +1420,9 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     val callSite = getCallSite
     val cleanedFunc = clean(func)
     logInfo("Starting job: " + callSite.shortForm)
+    if (conf.getBoolean("spark.logLineage", false)) {
+      logInfo("RDD's recursive dependencies:\n" + rdd.toDebugString)
+    }
     dagScheduler.runJob(rdd, cleanedFunc, partitions, callSite, allowLocal,
       resultHandler, localProperties.get)
     progressBar.foreach(_.finishAll())