HADOOP-10312 Shell.ExitCodeException to have more useful toString

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.5@1607590 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -312,6 +312,8 @@ Release 2.5.0 - UNRELEASED
     HADOOP-10710. hadoop.auth cookie is not properly constructed according to 
     RFC2109. (Juan Yu via tucu)
 
+    HADOOP-10312 Shell.ExitCodeException to have more useful toString (stevel)
+
 Release 2.4.1 - 2014-06-23 
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/Shell.java

@@ -621,7 +621,7 @@ abstract public class Shell {
    * This is an IOException with exit code added.
    */
   public static class ExitCodeException extends IOException {
-    int exitCode;
+    private final int exitCode;
     
     public ExitCodeException(int exitCode, String message) {
       super(message);
@@ -631,6 +631,16 @@ abstract public class Shell {
     public int getExitCode() {
       return exitCode;
     }
+
+    @Override
+    public String toString() {
+      final StringBuilder sb =
+          new StringBuilder("ExitCodeException ");
+      sb.append("exitCode=").append(exitCode)
+        .append(": ");
+      sb.append(super.getMessage());
+      return sb.toString();
+    }
   }
   
   /**