HDDS-6176. Ozone service WebUI is not accessible with 404 error.

hadoop-hdds/common/src/main/resources/ozone-default.xml

@@ -2935,11 +2935,10 @@
     <description>
       The base dir for HTTP Jetty server to extract contents. If this property
       is not configured, by default, Jetty will create a directory inside the
-      directory named by the java.io.tmpdir System property（/tmp by default）.
-      While in production environment, it's strongly suggested to instruct Jetty
-      to use a different parent directory by setting this property to the name
-      of the desired parent directory. The value of the property will be used to
-      set Jetty context attribute 'org.eclipse.jetty.webapp.basetempdir'.
+      directory named by the ozone.metadata.dirs. While in production environment,
+      it's strongly suggested instructing Jetty to use a different parent directory by
+      setting this property to the name of the desired parent directory. The value of the
+      property will be used to set Jetty context attribute 'org.eclipse.jetty.webapp.basetempdir'.
       The directory named by this property must exist and be writeable.
     </description>
   </property>

hadoop-hdds/framework/src/main/java/org/apache/hadoop/hdds/server/http/BaseHttpServer.java

@@ -43,6 +43,7 @@
 import static org.apache.hadoop.hdds.HddsUtils.getHostNameFromConfigKeys;
 import static org.apache.hadoop.hdds.HddsUtils.getPortNumberFromConfigKeys;
 import static org.apache.hadoop.hdds.HddsUtils.createDir;
+import static org.apache.hadoop.hdds.server.ServerUtils.getOzoneMetaDirPath;
 import static org.apache.hadoop.hdds.server.http.HttpConfig.getHttpPolicy;
 import static org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_ADMINISTRATORS;
 import static org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_ADMINISTRATORS_GROUPS;
@@ -70,6 +71,7 @@ public abstract class BaseHttpServer {
   static final String PROMETHEUS_SINK = "PROMETHEUS_SINK";
   private static final String JETTY_BASETMPDIR =
       "org.eclipse.jetty.webapp.basetempdir";
+  private final String serverDir = "/webserver";
 
   private HttpServer2 httpServer;
   private final MutableConfigurationSource conf;
@@ -178,11 +180,14 @@ public BaseHttpServer(MutableConfigurationSource conf, String name)
       }
 
       String baseDir = conf.get(OzoneConfigKeys.OZONE_HTTP_BASEDIR);
-      if (!StringUtils.isEmpty(baseDir)) {
-        createDir(baseDir);
-        httpServer.getWebAppContext().setAttribute(JETTY_BASETMPDIR, baseDir);
-        LOG.info("HTTP server of {} uses base directory {}", name, baseDir);
+
+      if (StringUtils.isEmpty(baseDir)) {
+        baseDir =
+            conf.get(String.valueOf(getOzoneMetaDirPath(conf))) + serverDir;
       }
+      createDir(baseDir);
+      httpServer.getWebAppContext().setAttribute(JETTY_BASETMPDIR, baseDir);
+      LOG.info("HTTP server of {} uses base directory {}", name, baseDir);
     }
   }