HADOOP-8086. KerberosName silently sets defaultRealm to empty if the Kerberos config is not found, it should log a WARN (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1310233 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosName.java

@@ -23,10 +23,11 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.lang.reflect.Method;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 
 /**
@@ -38,6 +39,8 @@ import org.apache.hadoop.classification.InterfaceStability;
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 @InterfaceStability.Evolving
 public class KerberosName {
+  private static final Logger LOG = LoggerFactory.getLogger(KerberosName.class);
+
   /** The first component of the name */
   private final String serviceName;
   /** The second component of the name. It may be null. */
@@ -81,6 +84,7 @@ public class KerberosName {
     try {
       defaultRealm = KerberosUtil.getDefaultRealm();
     } catch (Exception ke) {
+        LOG.warn("Kerberos krb5 configuration not found, setting default realm to empty");
         defaultRealm="";
     }
   }

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

@@ -255,6 +255,9 @@ Release 2.0.0 - UNRELEASED
     HADOOP-8077. HA: fencing method should be able to be configured on
     a per-NN or per-NS basis (todd)
 
+    HADOOP-8086. KerberosName silently sets defaultRealm to "" if the 
+    Kerberos config is not found, it should log a WARN (tucu)
+
   OPTIMIZATIONS
 
   BUG FIXES