HADOOP-12318. Expose underlying LDAP exceptions in SaslPlainServer. Contributed by Mike Yoder.

(cherry picked from commit 28ea4c068ea0152af682058b02311bba81780770)

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

@@ -235,6 +235,9 @@ Release 2.8.0 - UNRELEASED
     HADOOP-12280. Skip unit tests based on maven profile rather than
     NativeCodeLoader.isNativeCodeLoaded (Masatake Iwasaki via Colin P. McCabe)
 
+    HADOOP-12318. Expose underlying LDAP exceptions in SaslPlainServer. (Mike
+    Yoder via atm)
+
   OPTIMIZATIONS
 
     HADOOP-11785. Reduce the number of listStatus operation in distcp

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SaslPlainServer.java

@@ -105,7 +105,7 @@ public class SaslPlainServer implements SaslServer {
         authz = ac.getAuthorizedID();
       }
     } catch (Exception e) {
-      throw new SaslException("PLAIN auth failed: " + e.getMessage());
+      throw new SaslException("PLAIN auth failed: " + e.getMessage(), e);
     } finally {
       completed = true;
     }