HADOOP-10478. Fix new findbugs warnings in hadoop-maven-plugins. Contributed by Li Lu.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -987,6 +987,9 @@ Release 2.7.0 - UNRELEASED
     HADOOP-11584 s3a file block size set to 0 in getFileStatus.
     (Brahma Reddy Battula via stevel)
 
+    HADOOP-10478. Fix new findbugs warnings in hadoop-maven-plugins.
+    (Li Lu via wheat9)
+
 Release 2.6.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/util/Exec.java

@@ -19,6 +19,7 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -87,7 +88,11 @@ public class Exec {
     public OutputBufferThread(InputStream is) {
       this.setDaemon(true);
       output = new ArrayList<String>();
-      reader = new BufferedReader(new InputStreamReader(is));
+      try {
+        reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+      } catch (UnsupportedEncodingException e) {
+        throw new RuntimeException("Unsupported encoding " + e.toString());
+      }
     }
 
     @Override