HADOOP-18592. Sasl connection failure should log remote address. (#5294)

Contributed by Viraj Jasani <vjasani@apache.org>

Signed-off-by: Chris Nauroth <cnauroth@apache.org>
Signed-off-by: Steve Loughran <stevel@apache.org>
Signed-off-by: Mingliang Liu <liuml07@apache.org>

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/Client.java

@@ -704,7 +704,7 @@ private synchronized void setupConnection(
      * handle that, a relogin is attempted.
      */
     private synchronized void handleSaslConnectionFailure(
-        final int currRetries, final int maxRetries, final Exception ex,
+        final int currRetries, final int maxRetries, final IOException ex,
         final Random rand, final UserGroupInformation ugi) throws IOException,
         InterruptedException {
       ugi.doAs(new PrivilegedExceptionAction<Object>() {
@@ -715,10 +715,7 @@ public Object run() throws IOException, InterruptedException {
           disposeSasl();
           if (shouldAuthenticateOverKrb()) {
             if (currRetries < maxRetries) {
-              if(LOG.isDebugEnabled()) {
-                LOG.debug("Exception encountered while connecting to "
-                    + "the server : " + ex);
-              }
+              LOG.debug("Exception encountered while connecting to the server {}", remoteId, ex);
               // try re-login
               if (UserGroupInformation.isLoginKeytabBased()) {
                 UserGroupInformation.getLoginUser().reloginFromKeytab();
@@ -736,19 +733,21 @@ public Object run() throws IOException, InterruptedException {
                   + UserGroupInformation.getLoginUser().getUserName() + " to "
                   + remoteId;
               LOG.warn(msg, ex);
-              throw (IOException) new IOException(msg).initCause(ex);
+              throw NetUtils.wrapException(remoteId.getAddress().getHostName(),
+                  remoteId.getAddress().getPort(),
+                  NetUtils.getHostname(),
+                  0,
+                  ex);
             }
           } else {
             // With RequestHedgingProxyProvider, one rpc call will send multiple
             // requests to all namenodes. After one request return successfully,
             // all other requests will be interrupted. It's not a big problem,
             // and should not print a warning log.
             if (ex instanceof InterruptedIOException) {
-              LOG.debug("Exception encountered while connecting to the server",
-                  ex);
+              LOG.debug("Exception encountered while connecting to the server {}", remoteId, ex);
             } else {
-              LOG.warn("Exception encountered while connecting to the server ",
-                  ex);
+              LOG.warn("Exception encountered while connecting to the server {}", remoteId, ex);
             }
           }
           if (ex instanceof RemoteException)