HDDS-1450. Fix nightly run failures after HDDS-976. Contributed by Xiaoyu Yao. (#757)

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/ScmConfigKeys.java

@@ -368,8 +368,6 @@ public final class ScmConfigKeys {
       "hdds.scm.http.kerberos.keytab";
 
   // Network topology
-  public static final String OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE_TYPE =
-          "ozone.scm.network.topology.schema.file.type";
   public static final String OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE =
       "ozone.scm.network.topology.schema.file";
   public static final String OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE_DEFAULT =

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/net/NodeSchemaManager.java

@@ -19,6 +19,7 @@ package org.apache.hadoop.hdds.scm.net;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
+import org.apache.commons.io.FilenameUtils;
 import org.apache.hadoop.hdds.scm.ScmConfigKeys;
 import org.apache.hadoop.hdds.scm.net.NodeSchemaLoader.NodeSchemaLoadResult;
 import org.slf4j.Logger;
@@ -59,16 +60,14 @@ public final class NodeSchemaManager {
     /**
      * Load schemas from network topology schema configuration file
      */
-    String schemaFileType = conf.get(
-            ScmConfigKeys.OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE_TYPE);
-
     String schemaFile = conf.get(
         ScmConfigKeys.OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE,
         ScmConfigKeys.OZONE_SCM_NETWORK_TOPOLOGY_SCHEMA_FILE_DEFAULT);
 
     NodeSchemaLoadResult result;
     try {
-      if (schemaFileType.toLowerCase().compareTo("yaml") == 0) {
+      if (FilenameUtils.getExtension(schemaFile).toLowerCase()
+          .compareTo("yaml") == 0) {
         result = NodeSchemaLoader.getInstance().loadSchemaFromYaml(schemaFile);
       } else {
         result = NodeSchemaLoader.getInstance().loadSchemaFromXml(schemaFile);

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

@@ -2288,10 +2288,12 @@
   </property>
   <property>
     <name>ozone.scm.network.topology.schema.file</name>
-    <value>network-topology-default.xm</value>
+    <value>network-topology-default.xml</value>
     <tag>OZONE, MANAGEMENT</tag>
     <description>
-      The schema file defines the ozone network topology
+      The schema file defines the ozone network topology. We currently support
+      xml(default) and yaml format. Refer to the samples in the topology
+      awareness document for xml and yaml topology definition samples.
     </description>
   </property>
   <property>