HDFS-14140. JournalNodeSyncer authentication is failing in secure cluster. Contributed by Surendra Singh Lilhore.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/JournalNodeSyncer.java

@@ -38,6 +38,7 @@ import org.apache.hadoop.hdfs.util.DataTransferThrottler;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
 import org.apache.hadoop.security.SecurityUtil;
+import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.Daemon;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -439,15 +440,23 @@ public class JournalNodeSyncer {
     File tmpEditsFile = jnStorage.getTemporaryEditsFile(
         log.getStartTxId(), log.getEndTxId());
 
-    try {
-      Util.doGetUrl(url, ImmutableList.of(tmpEditsFile), jnStorage, false,
-          logSegmentTransferTimeout, throttler);
-    } catch (IOException e) {
-      LOG.error("Download of Edit Log file for Syncing failed. Deleting temp " +
-          "file: " + tmpEditsFile);
-      if (!tmpEditsFile.delete()) {
-        LOG.warn("Deleting " + tmpEditsFile + " has failed");
+    if (!SecurityUtil.doAsLoginUser(() -> {
+      if (UserGroupInformation.isSecurityEnabled()) {
+        UserGroupInformation.getCurrentUser().checkTGTAndReloginFromKeytab();
+      }
+      try {
+        Util.doGetUrl(url, ImmutableList.of(tmpEditsFile), jnStorage, false,
+            logSegmentTransferTimeout, throttler);
+      } catch (IOException e) {
+        LOG.error("Download of Edit Log file for Syncing failed. Deleting temp "
+            + "file: " + tmpEditsFile, e);
+        if (!tmpEditsFile.delete()) {
+          LOG.warn("Deleting " + tmpEditsFile + " has failed");
+        }
+        return false;
       }
+      return true;
+    })) {
       return false;
     }
     LOG.info("Downloaded file " + tmpEditsFile.getName() + " of size " +