Default copy settings to true and deprecate on the REST layer

client/rest-high-level/src/test/java/org/elasticsearch/client/IndicesClientIT.java

@@ -642,7 +642,12 @@ public void testShrink() throws IOException {
 
         ResizeRequest resizeRequest = new ResizeRequest("target", "source");
         resizeRequest.setResizeType(ResizeType.SHRINK);
-        Settings targetSettings = Settings.builder().put("index.number_of_shards", 2).put("index.number_of_replicas", 0).build();
+        Settings targetSettings =
+                Settings.builder()
+                        .put("index.number_of_shards", 2)
+                        .put("index.number_of_replicas", 0)
+                        .putNull("index.routing.allocation.require._name")
+                        .build();
         resizeRequest.setTargetIndex(new CreateIndexRequest("target").settings(targetSettings).alias(new Alias("alias")));
         ResizeResponse resizeResponse = highLevelClient().indices().shrink(resizeRequest);
         assertTrue(resizeResponse.isAcknowledged());

client/rest-high-level/src/test/java/org/elasticsearch/client/documentation/IndicesClientDocumentationIT.java

@@ -1305,7 +1305,8 @@ public void testShrinkIndex() throws Exception {
         // end::shrink-index-request-waitForActiveShards
         // tag::shrink-index-request-settings
         request.getTargetIndexRequest().settings(Settings.builder()
-                .put("index.number_of_shards", 2)); // <1>
+                .put("index.number_of_shards", 2) // <1>
+                .putNull("index.routing.allocation.require._name")); // <2>
         // end::shrink-index-request-settings
         // tag::shrink-index-request-aliases
         request.getTargetIndexRequest().alias(new Alias("target_alias")); // <1>

docs/java-rest/high-level/indices/shrink_index.asciidoc

@@ -45,8 +45,8 @@ returns a response, as an `ActiveShardCount`
 --------------------------------------------------
 include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-request-settings]
 --------------------------------------------------
-<1> The settings to apply to the target index, which include the number of
-shards to create for it
+<1> The number of shards on the target of the shrink index request
+<2> Remove the allocation requirement copied from the source index
 
 ["source","java",subs="attributes,callouts,macros"]
 --------------------------------------------------

docs/reference/indices/shrink-index.asciidoc

@@ -62,7 +62,7 @@ the following request:
 
 [source,js]
 --------------------------------------------------
-POST my_source_index/_shrink/my_target_index?copy_settings=true
+POST my_source_index/_shrink/my_target_index
 {
   "settings": {
     "index.routing.allocation.require._name": null, <1>
@@ -106,7 +106,7 @@ and accepts `settings` and `aliases` parameters for the target index:
 
 [source,js]
 --------------------------------------------------
-POST my_source_index/_shrink/my_target_index?copy_settings=true
+POST my_source_index/_shrink/my_target_index
 {
   "settings": {
     "index.number_of_replicas": 1,
@@ -130,16 +130,6 @@ POST my_source_index/_shrink/my_target_index?copy_settings=true
 
 NOTE: Mappings may not be specified in the `_shrink` request.
 
-NOTE: By default, with the exception of `index.analysis`, `index.similarity`,
-and `index.sort` settings, index settings on the source index are not copied
-during a shrink operation. With the exception of non-copyable settings, settings
-from the source index can be copied to the target index by adding the URL
-parameter `copy_settings=true` to the request. Note that `copy_settings` can not
-be set to `false`. The parameter `copy_settings` will be removed in 8.0.0
-
-deprecated[6.4.0, not copying settings is deprecated, copying settings will be
-the default behavior in 7.x]
-
 [float]
 === Monitoring the shrink process
 

docs/reference/indices/split-index.asciidoc

@@ -123,7 +123,7 @@ the following request:
 
 [source,js]
 --------------------------------------------------
-POST my_source_index/_split/my_target_index?copy_settings=true
+POST my_source_index/_split/my_target_index
 {
   "settings": {
     "index.number_of_shards": 2
@@ -158,7 +158,7 @@ and accepts `settings` and `aliases` parameters for the target index:
 
 [source,js]
 --------------------------------------------------
-POST my_source_index/_split/my_target_index?copy_settings=true
+POST my_source_index/_split/my_target_index
 {
   "settings": {
     "index.number_of_shards": 5 <1>
@@ -177,16 +177,6 @@ POST my_source_index/_split/my_target_index?copy_settings=true
 
 NOTE: Mappings may not be specified in the `_split` request.
 
-NOTE: By default, with the exception of `index.analysis`, `index.similarity`,
-and `index.sort` settings, index settings on the source index are not copied
-during a split operation. With the exception of non-copyable settings, settings
-from the source index can be copied to the target index by adding the URL
-parameter `copy_settings=true` to the request. Note that `copy_settings` can not
-be set to `false`. The parameter `copy_settings` will be removed in 8.0.0
-
-deprecated[6.4.0, not copying settings is deprecated, copying settings will be
-the default behavior in 7.x]
-
 [float]
 === Monitoring the split process
 

docs/reference/migration/migrate_7_0/api.asciidoc

@@ -65,3 +65,13 @@ deprecated in 6.3.0 and now removed in 7.0.0.
 In the past, `fields` could be provided either as a parameter, or as part of the request
 body. Specifying `fields` in the request body as opposed to a parameter was deprecated
 in 6.4.0, and is now unsupported in 7.0.0.
+
+==== `copy_settings` is deprecated on shrink and split APIs
+
+Versions of Elasticsearch prior to 6.4.0 did not copy index settings on shrink
+and split operations. Starting with Elasticsearch 7.0.0, the default behavior
+will be for such settings to be copied on such operations. To enable users in
+6.4.0 to transition in 6.4.0 to the default behavior in 7.0.0, the
+`copy_settings` parameter was added on the REST layer. As this behavior will be
+the only behavior in 8.0.0, this parameter is deprecated in 7.0.0 for removal in
+8.0.0.

rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/10_basic.yml

@@ -1,8 +1,8 @@
 ---
 "Shrink index via API":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: expects warnings that pre-7.0.0 will not send
       features: "warnings"
   # creates an index with one document solely allocated on the master node
   # and shrinks it into a new index with a single shard
@@ -67,8 +67,6 @@
         body:
           settings:
             index.number_of_replicas: 0
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:

rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/20_source_mapping.yml

@@ -1,8 +1,8 @@
 ---
 "Shrink index ignores target template mapping":
     - skip:
-        version: " - 6.3.99"
-        reason: expects warnings that pre-6.4.0 will not send
+        version: " - 6.9.99"
+        reason: expects warnings that pre-7.0.0 will not send
         features: "warnings"
 
     - do:
@@ -71,8 +71,6 @@
           body:
             settings:
               index.number_of_replicas: 0
-        warnings:
-          - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
     - do:
         cluster.health:

rest-api-spec/src/main/resources/rest-api-spec/test/indices.shrink/30_copy_settings.yml

@@ -1,8 +1,8 @@
 ---
 "Copy settings during shrink index":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: expects warnings that pre-7.0.0 will not send
       features: "warnings"
 
   - do:
@@ -48,6 +48,8 @@
           settings:
             index.number_of_replicas: 0
             index.merge.scheduler.max_thread_count: 2
+      warnings:
+        - "parameter [copy_settings] is deprecated and will be removed in 8.0.0"
 
   - do:
       cluster.health:
@@ -63,33 +65,31 @@
   - match: { copy-settings-target.settings.index.blocks.write: "true" }
   - match: { copy-settings-target.settings.index.routing.allocation.include._id: $master }
 
-  # now we do a actual shrink and do not copy settings (by default)
+  # now we do a actual shrink and copy settings (by default)
   - do:
       indices.shrink:
         index: "source"
-        target: "no-copy-settings-target"
+        target: "default-copy-settings-target"
         wait_for_active_shards: 1
         master_timeout: 10s
         body:
           settings:
             index.number_of_replicas: 0
             index.merge.scheduler.max_thread_count: 2
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:
         wait_for_status: green
 
   - do:
       indices.get_settings:
-        index: "no-copy-settings-target"
+        index: "default-copy-settings-target"
 
-  # only the request setting should be copied
-  - is_false: no-copy-settings-target.settings.index.merge.scheduler.max_merge_count
-  - match: { no-copy-settings-target.settings.index.merge.scheduler.max_thread_count: "2" }
-  - is_false: no-copy-settings-target.settings.index.blocks.write
-  - is_false: no-copy-settings-target.settings.index.routing.allocation.include._id
+  # settings should be copied
+  - match: { default-copy-settings-target.settings.index.merge.scheduler.max_merge_count: "4" }
+  - match: { default-copy-settings-target.settings.index.merge.scheduler.max_thread_count: "2" }
+  - match: { default-copy-settings-target.settings.index.blocks.write: "true" }
+  - match: { default-copy-settings-target.settings.index.routing.allocation.include._id: $master }
 
   # now we do a actual shrink and try to set no copy settings
   - do:

rest-api-spec/src/main/resources/rest-api-spec/test/indices.split/10_basic.yml

@@ -33,8 +33,8 @@ setup:
 ---
 "Split index via API":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: pre-7.0.0 will send warnings
       features: "warnings"
 
   # make it read-only
@@ -61,8 +61,6 @@ setup:
           settings:
             index.number_of_replicas: 0
             index.number_of_shards: 4
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:
@@ -108,8 +106,7 @@ setup:
 "Split from 1 to N":
   - skip:
       version: " - 6.99.99"
-      reason: Automatic preparation for splitting was added in 7.0.0
-      features: "warnings"
+      reason: automatic preparation for splitting was added in 7.0.0
   - do:
       indices.create:
         index: source_one_shard
@@ -163,8 +160,6 @@ setup:
           settings:
             index.number_of_replicas: 0
             index.number_of_shards: 5
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:
@@ -205,13 +200,11 @@ setup:
   - match: { _id:      "3"     }
   - match: { _source:  { foo: "hello world 3" } }
 
-
-
 ---
 "Create illegal split indices":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: pre-7.0.0 will send warnings
       features: "warnings"
 
   # try to do an illegal split with number_of_routing_shards set
@@ -227,8 +220,6 @@ setup:
             index.number_of_replicas: 0
             index.number_of_shards: 4
             index.number_of_routing_shards: 8
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   # try to do an illegal split with illegal number_of_shards
   - do:
@@ -242,5 +233,3 @@ setup:
           settings:
             index.number_of_replicas: 0
             index.number_of_shards: 6
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"

rest-api-spec/src/main/resources/rest-api-spec/test/indices.split/20_source_mapping.yml

@@ -1,8 +1,8 @@
 ---
 "Split index ignores target template mapping":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: pre-7.0.0 will send warnings
       features: "warnings"
 
   # create index
@@ -65,8 +65,6 @@
           settings:
             index.number_of_shards: 2
             index.number_of_replicas: 0
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:

rest-api-spec/src/main/resources/rest-api-spec/test/indices.split/30_copy_settings.yml

@@ -1,8 +1,8 @@
 ---
 "Copy settings during split index":
   - skip:
-      version: " - 6.3.99"
-      reason: expects warnings that pre-6.4.0 will not send
+      version: " - 6.9.99"
+      reason: expects warnings that pre-7.0.0 will not send
       features: "warnings"
 
   - do:
@@ -50,6 +50,9 @@
             index.number_of_replicas: 0
             index.number_of_shards: 2
             index.merge.scheduler.max_thread_count: 2
+      warnings:
+        - "parameter [copy_settings] is deprecated and will be removed in 8.0.0"
+
 
   - do:
       cluster.health:
@@ -65,34 +68,32 @@
   - match: { copy-settings-target.settings.index.blocks.write: "true" }
   - match: { copy-settings-target.settings.index.routing.allocation.include._id: $master }
 
-  # now we do a actual shrink and do not copy settings (by default)
+  # now we do a actual shrink and copy settings (by default)
   - do:
       indices.split:
         index: "source"
-        target: "no-copy-settings-target"
+        target: "default-copy-settings-target"
         wait_for_active_shards: 1
         master_timeout: 10s
         body:
           settings:
             index.number_of_replicas: 0
             index.number_of_shards: 2
             index.merge.scheduler.max_thread_count: 2
-      warnings:
-        - "resize operations without copying settings is deprecated; set parameter [copy_settings] to [true] for future default behavior"
 
   - do:
       cluster.health:
         wait_for_status: green
 
   - do:
       indices.get_settings:
-        index: "no-copy-settings-target"
+        index: "default-copy-settings-target"
 
-  # only the request setting should be copied
-  - is_false: no-copy-settings-target.settings.index.merge.scheduler.max_merge_count
-  - match: { no-copy-settings-target.settings.index.merge.scheduler.max_thread_count: "2" }
-  - is_false: no-copy-settings-target.settings.index.blocks.write
-  - is_false: no-copy-settings-target.settings.index.routing.allocation.include._id
+  # settings should be copied
+  - match: { default-copy-settings-target.settings.index.merge.scheduler.max_merge_count: "4" }
+  - match: { default-copy-settings-target.settings.index.merge.scheduler.max_thread_count: "2" }
+  - match: { default-copy-settings-target.settings.index.blocks.write: "true" }
+  - match: { default-copy-settings-target.settings.index.routing.allocation.include._id: $master }
 
   - do:
       catch: /illegal_argument_exception/

server/src/main/java/org/elasticsearch/action/admin/indices/shrink/ResizeRequest.java

@@ -56,7 +56,7 @@ public class ResizeRequest extends AcknowledgedRequest<ResizeRequest> implements
     private CreateIndexRequest targetIndexRequest;
     private String sourceIndex;
     private ResizeType type = ResizeType.SHRINK;
-    private Boolean copySettings;
+    private Boolean copySettings = true;
 
     ResizeRequest() {}