HDFS-14685. DefaultAuditLogger doesn't print CallerContext. Contributed by xuzq.

(cherry picked from commit 6757fc1a1d40ffc771bb685886b0d4a16315eca5)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java

@@ -1067,7 +1067,9 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
 
     // Make sure there is at least one logger installed.
     if (auditLoggers.isEmpty()) {
-      auditLoggers.add(new DefaultAuditLogger());
+      DefaultAuditLogger defaultAuditLogger = new DefaultAuditLogger();
+      defaultAuditLogger.initialize(conf);
+      auditLoggers.add(defaultAuditLogger);
     }
 
     // Add audit logger to calculate top users

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/HdfsAuditLogger.java

@@ -61,13 +61,10 @@ public abstract class HdfsAuditLogger implements AuditLogger {
    * @param dtSecretManager The token secret manager, or null if not logging
    *          token tracking information
    */
-  public void logAuditEvent(boolean succeeded, String userName,
+  public abstract void logAuditEvent(boolean succeeded, String userName,
       InetAddress addr, String cmd, String src, String dst,
       FileStatus stat, CallerContext callerContext, UserGroupInformation ugi,
-      DelegationTokenSecretManager dtSecretManager) {
-    logAuditEvent(succeeded, userName, addr, cmd, src, dst, stat,
-                  ugi, dtSecretManager);
-  }
+      DelegationTokenSecretManager dtSecretManager);
 
   /**
    * Same as

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystem.java

@@ -18,6 +18,7 @@
 
 package org.apache.hadoop.hdfs.server.namenode;
 
+import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.HADOOP_CALLER_CONTEXT_ENABLED_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY;
 import static org.hamcrest.CoreMatchers.either;
@@ -242,10 +243,14 @@ public class TestFSNamesystem {
     conf.set(DFSConfigKeys.DFS_NAMENODE_AUDIT_LOGGERS_KEY, "");
     // Disable top logger
     conf.setBoolean(DFSConfigKeys.NNTOP_ENABLED_KEY, false);
+    conf.setBoolean(HADOOP_CALLER_CONTEXT_ENABLED_KEY, true);
     fsn = new FSNamesystem(conf, fsImage);
     auditLoggers = fsn.getAuditLoggers();
     assertTrue(auditLoggers.size() == 1);
     assertTrue(auditLoggers.get(0) instanceof FSNamesystem.DefaultAuditLogger);
+    FSNamesystem.DefaultAuditLogger defaultAuditLogger =
+        (FSNamesystem.DefaultAuditLogger) auditLoggers.get(0);
+    assertTrue(defaultAuditLogger.getCallerContextEnabled());
 
     // Not to specify any audit loggers in config
     conf.set(DFSConfigKeys.DFS_NAMENODE_AUDIT_LOGGERS_KEY, "");