Add node feature

Author: jordan-powers

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/index/100_field_name_length_limit.yml

@@ -1,3 +1,10 @@
+setup:
+  - requires:
+      cluster_features: ["mapper.ignore_dynamic_field_names_beyond_limit"]
+      reason: "setting must be present to be tested"
+
+---
+
 "Test field name length limit":
   - do:
       indices.create:
@@ -111,3 +118,25 @@
   - match:
       _source:
         test_really_long_field_name_that_will_be_ignored: foo
+
+---
+
+"Test field name length limit with static mapping":
+  - do:
+      catch: /illegal_argument_exception/
+      indices.create:
+        index: test_index
+        body:
+          settings:
+            index:
+              mapping:
+                field_name_length:
+                  ignore_dynamic_beyond_limit: true
+                  limit: 45
+          mappings:
+            dynamic: false
+            properties:
+              test_really_long_field_name_that_will_be_ignored:
+                type: text
+
+  - match: {error.reason: "Field name [test_really_long_field_name_that_will_be_ignored] is longer than the limit of [45] characters"}

server/src/main/java/org/elasticsearch/index/mapper/MapperFeatures.java

@@ -52,6 +52,9 @@ public class MapperFeatures implements FeatureSpecification {
     static final NodeFeature IGNORED_SOURCE_FIELDS_PER_ENTRY = new NodeFeature("mapper.ignored_source_fields_per_entry");
     public static final NodeFeature MULTI_FIELD_UNICODE_OPTIMISATION_FIX = new NodeFeature("mapper.multi_field.unicode_optimisation_fix");
     static final NodeFeature PATTERN_TEXT_RENAME = new NodeFeature("mapper.pattern_text_rename");
+    static final NodeFeature INDEX_MAPPING_IGNORE_DYNAMIC_BEYOND_FIELD_NAME_LIMIT = new NodeFeature(
+        "mapper.ignore_dynamic_field_names_beyond_limit"
+    );
 
     @Override
     public Set<NodeFeature> getTestFeatures() {
@@ -89,7 +92,8 @@ public Set<NodeFeature> getTestFeatures() {
             IGNORED_SOURCE_FIELDS_PER_ENTRY,
             MULTI_FIELD_UNICODE_OPTIMISATION_FIX,
             MATCH_ONLY_TEXT_BLOCK_LOADER_FIX,
-            PATTERN_TEXT_RENAME
+            PATTERN_TEXT_RENAME,
+            INDEX_MAPPING_IGNORE_DYNAMIC_BEYOND_FIELD_NAME_LIMIT
         );
     }
 }