[SPARK-17308] Improved the spark core code by replacing all pattern match on boolean value by if/else block.

## What changes were proposed in this pull request?
Improved the code quality of spark by replacing all pattern match on boolean value by if/else block.

## How was this patch tested?

By running the tests

Author: Shivansh <shiv4nsh@gmail.com>

Closes #14873 from shiv4nsh/SPARK-17308.

1 files changed, 20 insertions, 21 deletions

diff --git a/core/src/main/scala/org/apache/spark/deploy/Client.scala b/core/src/main/scala/org/apache/spark/deploy/Client.scala
index bf2dab6e71..ee276e1b71 100644
--- a/core/src/main/scala/org/apache/spark/deploy/Client.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/Client.scala
@@ -124,27 +124,26 @@ private class ClientEndpoint(
     logInfo("... polling master for driver state")
     val statusResponse =
       activeMasterEndpoint.askWithRetry[DriverStatusResponse](RequestDriverStatus(driverId))
-    statusResponse.found match {
-      case false =>
-        logError(s"ERROR: Cluster master did not recognize $driverId")
-        System.exit(-1)
-      case true =>
-        logInfo(s"State of $driverId is ${statusResponse.state.get}")
-        // Worker node, if present
-        (statusResponse.workerId, statusResponse.workerHostPort, statusResponse.state) match {
-          case (Some(id), Some(hostPort), Some(DriverState.RUNNING)) =>
-            logInfo(s"Driver running on $hostPort ($id)")
-          case _ =>
-        }
-        // Exception, if present
-        statusResponse.exception match {
-          case Some(e) =>
-            logError(s"Exception from cluster was: $e")
-            e.printStackTrace()
-            System.exit(-1)
-          case _ =>
-            System.exit(0)
-        }
+    if (statusResponse.found) {
+      logInfo(s"State of $driverId is ${statusResponse.state.get}")
+      // Worker node, if present
+      (statusResponse.workerId, statusResponse.workerHostPort, statusResponse.state) match {
+        case (Some(id), Some(hostPort), Some(DriverState.RUNNING)) =>
+          logInfo(s"Driver running on $hostPort ($id)")
+        case _ =>
+      }
+      // Exception, if present
+      statusResponse.exception match {
+        case Some(e) =>
+          logError(s"Exception from cluster was: $e")
+          e.printStackTrace()
+          System.exit(-1)
+        case _ =>
+          System.exit(0)
+      }
+    } else {
+      logError(s"ERROR: Cluster master did not recognize $driverId")
+      System.exit(-1)
     }
   }