Minor updates.

Author: tdas

external/kafka/src/main/scala/org/apache/spark/streaming/kafka/ReliableKafkaReceiver.scala

@@ -227,7 +227,7 @@ class ReliableKafkaReceiver[
 
         ZkUtils.updatePersistentPath(zkClient, zkPath, offset.toString)
       } catch {
-        case t: Throwable => logWarning(s"Exception during commit offset $offset for topic" +
+        case e: Exception => logWarning(s"Exception during commit offset $offset for topic" +
           s"${topicAndPart.topic}, partition ${topicAndPart.partition}", t)
       }
 

streaming/src/main/scala/org/apache/spark/streaming/receiver/BlockGenerator.scala

@@ -140,8 +140,8 @@ private[streaming] class BlockGenerator(
     } catch {
       case ie: InterruptedException =>
         logInfo("Block updating timer thread was interrupted")
-      case t: Throwable =>
-        reportError("Error in block updating thread", t)
+      case e: Exception =>
+        reportError("Error in block updating thread", e)
     }
   }
 
@@ -168,7 +168,7 @@ private[streaming] class BlockGenerator(
       case ie: InterruptedException =>
         logInfo("Block pushing thread was interrupted")
       case e: Exception =>
-        reportError("Error in block updating thread", e)
+        reportError("Error in block pushing thread", e)
     }
   }