HADOOP-17621. hadoop-auth to remove jetty-server dependency. (apache#2865)

Reviewed-by: Akira Ajisaka <aajisaka@apache.org>
(cherry picked from commit dac60b8)
(cherry picked from commit 1110b03)

Author: jojochuang

hadoop-common-project/hadoop-auth/pom.xml

@@ -188,11 +188,7 @@
       <artifactId>guava</artifactId>
       <scope>compile</scope>
     </dependency>
-    <dependency>
-      <groupId>org.eclipse.jetty</groupId>
-      <artifactId>jetty-server</artifactId>
-    </dependency>
-  </dependencies>
+ </dependencies>
 
   <build>
     <plugins>

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationFilter.java

@@ -19,7 +19,6 @@
 import org.apache.hadoop.security.authentication.client.AuthenticationException;
 import org.apache.hadoop.security.authentication.client.KerberosAuthenticator;
 import org.apache.hadoop.security.authentication.util.*;
-import org.eclipse.jetty.server.Response;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -621,18 +620,15 @@ && getMaxInactiveInterval() > 0) {
           errCode = HttpServletResponse.SC_FORBIDDEN;
         }
         // After Jetty 9.4.21, sendError() no longer allows a custom message.
-        // use setStatusWithReason() to set a custom message.
+        // use setStatus() to set a custom message.
         String reason;
         if (authenticationEx == null) {
           reason = "Authentication required";
         } else {
           reason = authenticationEx.getMessage();
         }
 
-        if (httpResponse instanceof Response) {
-          ((Response)httpResponse).setStatusWithReason(errCode, reason);
-        }
-
+        httpResponse.setStatus(errCode, reason);
         httpResponse.sendError(errCode, reason);
       }
     }