HADOOP-6518. Makes the UGI honor the env var KRB5CCNAME. Contributed by Owen O'Malley.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@904975 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -119,6 +119,9 @@ Trunk (unreleased changes)
     HADOOP-6495.  Identifier should be serialized after the password is
      created In Token constructor (jnp via boryas)
 
+    HADOOP-6518. Makes the UGI honor the env var KRB5CCNAME. 
+    (Owen O'Malley via ddas)
+
   OPTIMIZATIONS
 
   BUG FIXES

src/java/org/apache/hadoop/security/UserGroupInformation.java

@@ -241,6 +241,10 @@ public class UserGroupInformation {
     static {
       USER_KERBEROS_OPTIONS.put("doNotPrompt", "true");
       USER_KERBEROS_OPTIONS.put("useTicketCache", "true");
+      String ticketCache = System.getenv("KRB5CCNAME");
+      if (ticketCache != null) {
+        USER_KERBEROS_OPTIONS.put("ticketCache", ticketCache);
+      }
     }
     private static final AppConfigurationEntry USER_KERBEROS_LOGIN =
       new AppConfigurationEntry(Krb5LoginModule.class.getName(),