use e.printStackTrace() to replace "Console.err.println(e.getMessage)" so that client console can get more useful information when somthing is wrong.

Author: codeboyyong

yarn/alpha/src/main/scala/org/apache/spark/deploy/yarn/Client.scala

@@ -483,7 +483,7 @@ object Client {
       new Client(args, sparkConf).run()
     } catch {
       case e: Exception => {
-        Console.err.println(e.getMessage)
+        e.printStackTrace()
         System.exit(1)
       }
     }

yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala

@@ -80,7 +80,7 @@ private[spark] class YarnClientSchedulerBackend(
       waitForApp()
     } catch {
       case e: IllegalArgumentException => {
-        Console.err.println(e.getMessage)
+        e.printStackTrace()
         System.exit(1)
       }
     }

yarn/stable/src/main/scala/org/apache/spark/deploy/yarn/Client.scala

@@ -497,7 +497,7 @@ object Client {
       new Client(args, sparkConf).run()
     } catch {
       case e: Exception => {
-        Console.err.println(e.getMessage)
+        e.printStackTrace()
         System.exit(1)
       }
     }