Add sout debug

Signed-off-by: Sicheng Song <sicheng.song@outlook.com>

Author: b4sjoo

plugin/src/main/java/org/opensearch/ml/utils/MLNodeUtils.java

@@ -67,10 +67,11 @@ public static <T> void parseField(XContentParser parser, Set<T> set, Function<St
 
     public static void validateSchema(String schemaString, String instanceString) throws IOException {
         ObjectMapper mapper = new ObjectMapper();
+        System.out.println(schemaString);
         // parse the schema JSON as string
         JsonNode schemaNode = mapper.readTree(schemaString);
         JsonSchema schema = JsonSchemaFactory.getInstance(VersionFlag.V202012).getSchema(schemaNode);
-
+        System.out.println(instanceString);
         // JSON data to validate
         JsonNode jsonNode = mapper.readTree(instanceString);