Remove transport version V_8_16_1

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -82,7 +82,6 @@ static TransportVersion def(int id) {
     public static final TransportVersion V_8_15_0 = def(8_702_0_02);
     public static final TransportVersion V_8_15_2 = def(8_702_0_03);
     public static final TransportVersion V_8_16_0 = def(8_772_0_01);
-    public static final TransportVersion V_8_16_1 = def(8_772_0_04);
     // TODO: leave this version until the very end to satisfy max transport version test
     public static final TransportVersion INITIAL_ELASTICSEARCH_8_17_5 = def(8_797_0_05);
 

server/src/main/java/org/elasticsearch/action/admin/cluster/node/info/NodeInfo.java

@@ -66,11 +66,7 @@ public NodeInfo(StreamInput in) throws IOException {
         super(in);
         if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_12_0)) {
             version = in.readString();
-            if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_16_1)) {
-                compatibilityVersions = CompatibilityVersions.readVersion(in);
-            } else {
-                compatibilityVersions = new CompatibilityVersions(TransportVersion.readVersion(in), Map.of()); // unknown mappings versions
-            }
+            compatibilityVersions = CompatibilityVersions.readVersion(in);
             indexVersion = IndexVersion.readVersion(in);
         } else {
             Version legacyVersion = Version.readVersion(in);
@@ -251,11 +247,7 @@ public void writeTo(StreamOutput out) throws IOException {
         } else {
             Version.writeVersion(Version.fromString(version), out);
         }
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_16_1)) {
-            compatibilityVersions.writeTo(out);
-        } else if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_8_0)) {
-            TransportVersion.writeVersion(compatibilityVersions.transportVersion(), out);
-        }
+        compatibilityVersions.writeTo(out);
         if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_11_X)) {
             IndexVersion.writeVersion(indexVersion, out);
             out.writeMap(componentVersions, StreamOutput::writeString, StreamOutput::writeVInt);

server/src/main/java/org/elasticsearch/search/builder/SearchSourceBuilder.java

@@ -286,11 +286,7 @@ public SearchSourceBuilder(StreamInput in) throws IOException {
         if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_8_0)) {
             rankBuilder = in.readOptionalNamedWriteable(RankBuilder.class);
         }
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_16_1)) {
-            skipInnerHits = in.readBoolean();
-        } else {
-            skipInnerHits = false;
-        }
+        skipInnerHits = in.readBoolean();
     }
 
     @Override
@@ -370,9 +366,7 @@ public void writeTo(StreamOutput out) throws IOException {
         } else if (rankBuilder != null) {
             throw new IllegalArgumentException("cannot serialize [rank] to version [" + out.getTransportVersion().toReleaseVersion() + "]");
         }
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_16_1)) {
-            out.writeBoolean(skipInnerHits);
-        }
+        out.writeBoolean(skipInnerHits);
     }
 
     /**

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/authc/AuthenticationTests.java

@@ -51,7 +51,6 @@
 import static org.hamcrest.Matchers.hasKey;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.not;
-import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 import static org.hamcrest.Matchers.sameInstance;
 

x-pack/plugin/ent-search/src/main/java/org/elasticsearch/xpack/application/rules/QueryRulesetListItem.java

@@ -67,12 +67,7 @@ public QueryRulesetListItem(StreamInput in) throws IOException {
         } else {
             this.criteriaTypeToCountMap = Map.of();
         }
-        TransportVersion streamTransportVersion = in.getTransportVersion();
-        if (streamTransportVersion.onOrAfter(TransportVersions.V_8_16_1)) {
-            this.ruleTypeToCountMap = in.readMap(m -> in.readEnum(QueryRule.QueryRuleType.class), StreamInput::readInt);
-        } else {
-            this.ruleTypeToCountMap = Map.of();
-        }
+        this.ruleTypeToCountMap = in.readMap(m -> in.readEnum(QueryRule.QueryRuleType.class), StreamInput::readInt);
     }
 
     @Override
@@ -101,10 +96,7 @@ public void writeTo(StreamOutput out) throws IOException {
         if (out.getTransportVersion().onOrAfter(EXPANDED_RULESET_COUNT_TRANSPORT_VERSION)) {
             out.writeMap(criteriaTypeToCountMap, StreamOutput::writeEnum, StreamOutput::writeInt);
         }
-        TransportVersion streamTransportVersion = out.getTransportVersion();
-        if (streamTransportVersion.onOrAfter(TransportVersions.V_8_16_1)) {
-            out.writeMap(ruleTypeToCountMap, StreamOutput::writeEnum, StreamOutput::writeInt);
-        }
+        out.writeMap(ruleTypeToCountMap, StreamOutput::writeEnum, StreamOutput::writeInt);
     }
 
     /**

x-pack/plugin/ent-search/src/test/java/org/elasticsearch/xpack/application/rules/action/ListQueryRulesetsActionResponseBWCSerializingTests.java

@@ -8,7 +8,6 @@
 package org.elasticsearch.xpack.application.rules.action;
 
 import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.xpack.application.EnterpriseSearchModuleTestUtils;
 import org.elasticsearch.xpack.application.rules.QueryRule;
@@ -17,8 +16,6 @@
 import org.elasticsearch.xpack.application.rules.QueryRulesetListItem;
 import org.elasticsearch.xpack.core.ml.AbstractBWCWireSerializationTestCase;
 
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Map;
 
 public class ListQueryRulesetsActionResponseBWCSerializingTests extends AbstractBWCWireSerializationTestCase<
@@ -59,22 +56,6 @@ protected ListQueryRulesetsAction.Response mutateInstanceForVersion(
         ListQueryRulesetsAction.Response instance,
         TransportVersion version
     ) {
-        if (version.onOrAfter(TransportVersions.V_8_16_1)) {
-            return instance;
-        } else if (version.onOrAfter(QueryRulesetListItem.EXPANDED_RULESET_COUNT_TRANSPORT_VERSION)) {
-            List<QueryRulesetListItem> updatedResults = new ArrayList<>();
-            for (QueryRulesetListItem listItem : instance.queryPage.results()) {
-                updatedResults.add(
-                    new QueryRulesetListItem(listItem.rulesetId(), listItem.ruleTotalCount(), listItem.criteriaTypeToCountMap(), Map.of())
-                );
-            }
-            return new ListQueryRulesetsAction.Response(updatedResults, instance.queryPage.count());
-        } else {
-            List<QueryRulesetListItem> updatedResults = new ArrayList<>();
-            for (QueryRulesetListItem listItem : instance.queryPage.results()) {
-                updatedResults.add(new QueryRulesetListItem(listItem.rulesetId(), listItem.ruleTotalCount(), Map.of(), Map.of()));
-            }
-            return new ListQueryRulesetsAction.Response(updatedResults, instance.queryPage.count());
-        }
+        return instance;
     }
 }