Remove empty catch statement

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/file/tfile/TestTFileUnsortedByteArrays.java

@@ -92,10 +92,7 @@ public void testFailureScannerWithKeys() throws IOException {
           reader.createScannerByKey("aaa".getBytes(), "zzz".getBytes());
       Assert
           .fail("Failed to catch creating scanner with keys on unsorted file.");
-    }
-    catch (RuntimeException e) {
-    }
-    finally {
+    } finally {
       reader.close();
     }
   }
@@ -192,33 +189,21 @@ public void testFailureSeek() throws IOException {
       try {
         scanner.lowerBound("keyN".getBytes());
         Assert.fail("Cannot search in a unsorted TFile!");
-      }
-      catch (Exception e) {
-        // noop, expecting excetions
-      }
-      finally {
+      } finally {
       }
 
       // can't find higher
       try {
         scanner.upperBound("keyA".getBytes());
         Assert.fail("Cannot search higher in a unsorted TFile!");
-      }
-      catch (Exception e) {
-        // noop, expecting excetions
-      }
-      finally {
+      } finally {
       }
 
       // can't seek
       try {
         scanner.seekTo("keyM".getBytes());
         Assert.fail("Cannot search a unsorted TFile!");
-      }
-      catch (Exception e) {
-        // noop, expecting excetions
-      }
-      finally {
+      } finally {
       }
     }
     finally {

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java

@@ -593,7 +593,6 @@ private void closeResponder() {
         try {
           response.close();
           response.join();
-        } catch (InterruptedException  e) {
         } finally {
           response = null;
         }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockTokenWithDFS.java

@@ -160,7 +160,6 @@ private static void tryRead(Configuration conf, LocatedBlock lblock,
       if (s != null) {
         try {
           s.close();
-        } catch (IOException iex) {
         } finally {
           s = null;
         }

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestYarnClientProtocolProvider.java

@@ -43,18 +43,16 @@ public void testClusterWithYarnClientProtocolProvider() throws Exception {
 
     }
 
-    try {
-      conf = new Configuration();
-      conf.set(MRConfig.FRAMEWORK_NAME, MRConfig.YARN_FRAMEWORK_NAME);
-      cluster = new Cluster(conf);
-      ClientProtocol client = cluster.getClient();
-      assertTrue(client instanceof YARNRunner);
-    } catch (IOException e) {
-
-    } finally {
-      if (cluster != null) {
-        cluster.close();
-      }
+    try {
+      conf = new Configuration();
+      conf.set(MRConfig.FRAMEWORK_NAME, MRConfig.YARN_FRAMEWORK_NAME);
+      cluster = new Cluster(conf);
+      ClientProtocol client = cluster.getClient();
+      assertTrue(client instanceof YARNRunner);
+    } finally {
+      if (cluster != null) {
+        cluster.close();
+      }
     }
   }
 

hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestResourceUsageEmulators.java

@@ -105,8 +105,6 @@ public void initialize(Configuration conf, ResourceUsageMetrics metrics,
 
         touchPath = getFilePath(getIdentifier());
         fs.delete(touchPath, false);
-      } catch (Exception e) {
-
       } finally {
         if (fs != null) {
           try {

hadoop-mapreduce-project/src/test/mapred/org/apache/hadoop/fs/slive/TestSlive.java

@@ -476,8 +476,6 @@ public void testBadChunks() throws Exception {
     try {
       in = new DataInputStream(new FileInputStream(fn));
       vout = vf.verifyFile(byteAm, in);
-    } catch (Exception e) {
-
     } finally {
       if(in != null) in.close();
     }