Remove some 7.7 and 7.8 transport versions

server/src/main/java/org/elasticsearch/cluster/metadata/ComponentTemplateMetadata.java

@@ -89,7 +89,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 
     @Override
@@ -166,7 +166,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersions.V_7_7_0;
+            return TransportVersions.ZERO;
         }
     }
 }

server/src/main/java/org/elasticsearch/cluster/metadata/ComposableIndexTemplateMetadata.java

@@ -94,7 +94,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 
     @Override
@@ -167,7 +167,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersions.V_7_7_0;
+            return TransportVersions.ZERO;
         }
     }
 }

server/src/main/java/org/elasticsearch/cluster/metadata/DataStreamMetadata.java

@@ -217,7 +217,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 
     @Override
@@ -311,7 +311,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersions.V_7_7_0;
+            return TransportVersions.ZERO;
         }
     }
 }

server/src/main/java/org/elasticsearch/script/ScriptException.java

@@ -10,7 +10,6 @@
 package org.elasticsearch.script;
 
 import org.elasticsearch.ElasticsearchException;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -79,7 +78,7 @@ public ScriptException(StreamInput in) throws IOException {
         scriptStack = Arrays.asList(in.readStringArray());
         script = in.readString();
         lang = in.readString();
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0) && in.readBoolean()) {
+        if (in.readBoolean()) {
             pos = new Position(in);
         } else {
             pos = null;
@@ -92,13 +91,11 @@ protected void writeTo(StreamOutput out, Writer<Throwable> nestedExceptionsWrite
         out.writeStringCollection(scriptStack);
         out.writeString(script);
         out.writeString(lang);
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-            if (pos == null) {
-                out.writeBoolean(false);
-            } else {
-                out.writeBoolean(true);
-                pos.writeTo(out);
-            }
+        if (pos == null) {
+            out.writeBoolean(false);
+        } else {
+            out.writeBoolean(true);
+            pos.writeTo(out);
         }
     }
 

server/src/main/java/org/elasticsearch/search/DocValueFormat.java

@@ -271,13 +271,6 @@ private DateTime(StreamInput in) throws IOException {
             this.formatter = DateFormatter.forPattern(formatterPattern).withZone(this.timeZone).withLocale(locale);
             this.parser = formatter.toDateMathParser();
             this.resolution = DateFieldMapper.Resolution.ofOrdinal(in.readVInt());
-            if (in.getTransportVersion().between(TransportVersions.V_7_7_0, TransportVersions.V_8_0_0)) {
-                /* when deserialising from 7.7+ nodes expect a flag indicating if a pattern is of joda style
-                   This is only used to support joda style indices in 7.x, in 8 we no longer support this.
-                   All indices in 8 should use java style pattern. Hence we can ignore this flag.
-                */
-                in.readBoolean();
-            }
             this.formatSortValues = in.readBoolean();
         }
 
@@ -302,13 +295,6 @@ public void writeTo(StreamOutput out) throws IOException {
             }
             out.writeString(timeZone.getId());
             out.writeVInt(resolution.ordinal());
-            if (out.getTransportVersion().between(TransportVersions.V_7_7_0, TransportVersions.V_8_0_0)) {
-                /* when serializing to 7.7+  send out a flag indicating if a pattern is of joda style
-                   This is only used to support joda style indices in 7.x, in 8 we no longer support this.
-                   All indices in 8 should use java style pattern. Hence this flag is always false.
-                */
-                out.writeBoolean(false);
-            }
             out.writeBoolean(formatSortValues);
         }
 

server/src/main/java/org/elasticsearch/tasks/TaskCancellationService.java

@@ -333,11 +333,7 @@ private BanParentTaskRequest(StreamInput in) throws IOException {
             parentTaskId = TaskId.readFromStream(in);
             ban = in.readBoolean();
             reason = ban ? in.readString() : null;
-            if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_8_0)) {
-                waitForCompletion = in.readBoolean();
-            } else {
-                waitForCompletion = false;
-            }
+            waitForCompletion = in.readBoolean();
         }
 
         @Override
@@ -348,9 +344,7 @@ public void writeTo(StreamOutput out) throws IOException {
             if (ban) {
                 out.writeString(reason);
             }
-            if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_8_0)) {
-                out.writeBoolean(waitForCompletion);
-            }
+            out.writeBoolean(waitForCompletion);
         }
     }
 

server/src/main/java/org/elasticsearch/transport/ProxyConnectionStrategy.java

@@ -9,7 +9,6 @@
 
 package org.elasticsearch.transport;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.cluster.ClusterName;
@@ -355,11 +354,7 @@ public ProxyModeInfo(String address, String serverName, int maxSocketConnections
 
         private ProxyModeInfo(StreamInput input) throws IOException {
             address = input.readString();
-            if (input.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                serverName = input.readString();
-            } else {
-                serverName = null;
-            }
+            serverName = input.readString();
             maxSocketConnections = input.readVInt();
             numSocketsConnected = input.readVInt();
         }
@@ -376,9 +371,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         @Override
         public void writeTo(StreamOutput out) throws IOException {
             out.writeString(address);
-            if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                out.writeString(serverName);
-            }
+            out.writeString(serverName);
             out.writeVInt(maxSocketConnections);
             out.writeVInt(numSocketsConnected);
         }

server/src/test/java/org/elasticsearch/action/OriginalIndicesTests.java

@@ -9,7 +9,6 @@
 
 package org.elasticsearch.action;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -43,15 +42,7 @@ public void testOriginalIndicesSerialization() throws IOException {
             OriginalIndices originalIndices2 = OriginalIndices.readOriginalIndices(in);
 
             assertThat(originalIndices2.indices(), equalTo(originalIndices.indices()));
-            // indices options are not equivalent when sent to an older version and re-read due
-            // to the addition of hidden indices as expand to hidden indices is always true when
-            // read from a prior version
-            if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)
-                || originalIndices.indicesOptions().expandWildcardsHidden()) {
-                assertThat(originalIndices2.indicesOptions(), equalTo(originalIndices.indicesOptions()));
-            } else if (originalIndices.indicesOptions().expandWildcardsHidden()) {
-                assertThat(originalIndices2.indicesOptions(), equalTo(originalIndices.indicesOptions()));
-            }
+            assertThat(originalIndices2.indicesOptions(), equalTo(originalIndices.indicesOptions()));
         }
     }
 

server/src/test/java/org/elasticsearch/action/admin/cluster/shards/ClusterSearchShardsRequestTests.java

@@ -10,7 +10,6 @@
 package org.elasticsearch.action.admin.cluster.shards;
 
 import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
@@ -54,12 +53,7 @@ public void testSerialization() throws Exception {
                 in.setTransportVersion(version);
                 ClusterSearchShardsRequest deserialized = new ClusterSearchShardsRequest(in);
                 assertArrayEquals(request.indices(), deserialized.indices());
-                // indices options are not equivalent when sent to an older version and re-read due
-                // to the addition of hidden indices as expand to hidden indices is always true when
-                // read from a prior version
-                if (version.onOrAfter(TransportVersions.V_7_7_0) || request.indicesOptions().expandWildcardsHidden()) {
-                    assertEquals(request.indicesOptions(), deserialized.indicesOptions());
-                }
+                assertEquals(request.indicesOptions(), deserialized.indicesOptions());
                 assertEquals(request.routing(), deserialized.routing());
                 assertEquals(request.preference(), deserialized.preference());
             }

server/src/test/java/org/elasticsearch/action/admin/indices/close/CloseIndexRequestTests.java

@@ -56,14 +56,7 @@ public void testBwcSerialization() throws Exception {
                     assertEquals(request.ackTimeout(), in.readTimeValue());
                     assertArrayEquals(request.indices(), in.readStringArray());
                     final IndicesOptions indicesOptions = IndicesOptions.readIndicesOptions(in);
-                    // indices options are not equivalent when sent to an older version and re-read due
-                    // to the addition of hidden indices as expand to hidden indices is always true when
-                    // read from a prior version
-                    // TODO update version on backport!
-                    if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)
-                        || request.indicesOptions().expandWildcardsHidden()) {
-                        assertEquals(request.indicesOptions(), indicesOptions);
-                    }
+                    assertEquals(request.indicesOptions(), indicesOptions);
                     assertEquals(request.waitForActiveShards(), ActiveShardCount.readFrom(in));
                 }
             }
@@ -92,13 +85,7 @@ public void testBwcSerialization() throws Exception {
                 assertEquals(sample.masterNodeTimeout(), deserializedRequest.masterNodeTimeout());
                 assertEquals(sample.ackTimeout(), deserializedRequest.ackTimeout());
                 assertArrayEquals(sample.indices(), deserializedRequest.indices());
-                // indices options are not equivalent when sent to an older version and re-read due
-                // to the addition of hidden indices as expand to hidden indices is always true when
-                // read from a prior version
-                // TODO change version on backport
-                if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0) || sample.indicesOptions().expandWildcardsHidden()) {
-                    assertEquals(sample.indicesOptions(), deserializedRequest.indicesOptions());
-                }
+                assertEquals(sample.indicesOptions(), deserializedRequest.indicesOptions());
                 assertEquals(sample.waitForActiveShards(), deserializedRequest.waitForActiveShards());
             }
         }

server/src/test/java/org/elasticsearch/index/mapper/ParametrizedMapperTests.java

@@ -11,16 +11,13 @@
 
 import org.apache.lucene.analysis.standard.StandardAnalyzer;
 import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.lucene.Lucene;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentHelper;
-import org.elasticsearch.core.UpdateForV9;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.IndexVersion;
-import org.elasticsearch.index.IndexVersions;
 import org.elasticsearch.index.analysis.AnalyzerScope;
 import org.elasticsearch.index.analysis.IndexAnalyzers;
 import org.elasticsearch.index.analysis.NamedAnalyzer;
@@ -578,25 +575,6 @@ public void testAnalyzers() {
         );
     }
 
-    @UpdateForV9(owner = UpdateForV9.Owner.SEARCH_FOUNDATIONS)
-    @AwaitsFix(bugUrl = "this is testing legacy functionality so can likely be removed in 9.0")
-    public void testDeprecatedParameters() {
-        // 'index' is declared explicitly, 'store' is not, but is one of the previously always-accepted params
-        String mapping = """
-            {"type":"test_mapper","index":false,"store":true,"required":"value"}""";
-        TestMapper mapper = fromMapping(mapping, IndexVersions.V_7_8_0, TransportVersions.V_7_8_0);
-        assertWarnings("Parameter [store] has no effect on type [test_mapper] and will be removed in future");
-        assertFalse(mapper.index);
-        assertEquals("""
-            {"field":{"type":"test_mapper","index":false,"required":"value"}}""", Strings.toString(mapper));
-
-        MapperParsingException e = expectThrows(
-            MapperParsingException.class,
-            () -> fromMapping(mapping, IndexVersions.V_8_0_0, TransportVersions.V_8_0_0)
-        );
-        assertEquals("unknown parameter [store] on mapper [field] of type [test_mapper]", e.getMessage());
-    }
-
     public void testLinkedAnalyzers() throws IOException {
         String mapping = """
             {"type":"test_mapper","analyzer":"_standard","required":"value"}""";

x-pack/plugin/analytics/src/main/java/org/elasticsearch/xpack/analytics/boxplot/BoxplotAggregationBuilder.java

@@ -194,6 +194,6 @@ public Optional<Set<String>> getOutputFieldNames() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 }

x-pack/plugin/analytics/src/main/java/org/elasticsearch/xpack/analytics/topmetrics/TopMetricsAggregationBuilder.java

@@ -235,6 +235,6 @@ public Optional<Set<String>> getOutputFieldNames() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 }

x-pack/plugin/analytics/src/main/java/org/elasticsearch/xpack/analytics/ttest/TTestAggregationBuilder.java

@@ -182,6 +182,6 @@ public String getType() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_8_0;
+        return TransportVersions.ZERO;
     }
 }

x-pack/plugin/async-search/src/test/java/org/elasticsearch/xpack/search/CancellingAggregationBuilder.java

@@ -107,6 +107,6 @@ public BucketCardinality bucketCardinality() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_7_0;
+        return TransportVersions.ZERO;
     }
 }

x-pack/plugin/autoscaling/src/main/java/org/elasticsearch/xpack/autoscaling/AutoscalingMetadata.java

@@ -114,7 +114,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.V_7_8_0;
+        return TransportVersions.ZERO;
     }
 
     @Override
@@ -173,7 +173,7 @@ static Diff<AutoscalingPolicyMetadata> readFrom(final StreamInput in) throws IOE
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersions.V_7_8_0;
+            return TransportVersions.ZERO;
         }
     }
 }

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/analytics/action/AnalyticsStatsAction.java

@@ -6,7 +6,6 @@
  */
 package org.elasticsearch.xpack.core.analytics.action;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionType;
 import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.support.nodes.BaseNodeResponse;
@@ -138,36 +137,13 @@ public NodeResponse(DiscoveryNode node, EnumCounters<Item> counters) {
 
         public NodeResponse(StreamInput in) throws IOException {
             super(in);
-            if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_8_0)) {
-                counters = new EnumCounters<>(in, Item.class);
-            } else {
-                counters = new EnumCounters<>(Item.class);
-                if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                    counters.inc(Item.BOXPLOT, in.readVLong());
-                }
-                counters.inc(Item.CUMULATIVE_CARDINALITY, in.readZLong());
-                if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                    counters.inc(Item.STRING_STATS, in.readVLong());
-                    counters.inc(Item.TOP_METRICS, in.readVLong());
-                }
-            }
+            counters = new EnumCounters<>(in, Item.class);
         }
 
         @Override
         public void writeTo(StreamOutput out) throws IOException {
             super.writeTo(out);
-            if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_8_0)) {
-                counters.writeTo(out);
-            } else {
-                if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                    out.writeVLong(counters.get(Item.BOXPLOT));
-                }
-                out.writeZLong(counters.get(Item.CUMULATIVE_CARDINALITY));
-                if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_7_0)) {
-                    out.writeVLong(counters.get(Item.STRING_STATS));
-                    out.writeVLong(counters.get(Item.TOP_METRICS));
-                }
-            }
+            counters.writeTo(out);
         }
 
         public EnumCounters<Item> getStats() {