Remove 7.15 transport versions

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

@@ -60,8 +60,6 @@ static TransportVersion def(int id) {
     public static final TransportVersion V_7_8_1 = def(7_08_01_99);
     public static final TransportVersion V_7_9_0 = def(7_09_00_99);
     public static final TransportVersion V_7_10_0 = def(7_10_00_99);
-    public static final TransportVersion V_7_15_0 = def(7_15_00_99);
-    public static final TransportVersion V_7_15_1 = def(7_15_01_99);
     public static final TransportVersion V_7_17_0 = def(7_17_00_99);
     public static final TransportVersion V_7_17_1 = def(7_17_01_99);
     public static final TransportVersion V_7_17_8 = def(7_17_08_99);

server/src/main/java/org/elasticsearch/action/admin/cluster/allocation/ClusterAllocationExplanation.java

@@ -9,7 +9,6 @@
 
 package org.elasticsearch.action.admin.cluster.allocation;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.cluster.ClusterInfo;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.routing.ShardRouting;
@@ -80,11 +79,7 @@ public ClusterAllocationExplanation(
     }
 
     public ClusterAllocationExplanation(StreamInput in) throws IOException {
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-            this.specificShard = in.readBoolean();
-        } else {
-            this.specificShard = true; // suppress "this is a random shard" warning in BwC situations
-        }
+        this.specificShard = in.readBoolean();
         this.shardRouting = new ShardRouting(in);
         this.currentNode = in.readOptionalWriteable(DiscoveryNode::new);
         this.relocationTargetNode = in.readOptionalWriteable(DiscoveryNode::new);
@@ -94,9 +89,7 @@ public ClusterAllocationExplanation(StreamInput in) throws IOException {
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-            out.writeBoolean(specificShard);
-        } // else suppress "this is a random shard" warning in BwC situations
+        out.writeBoolean(specificShard);
         shardRouting.writeTo(out);
         out.writeOptionalWriteable(currentNode);
         out.writeOptionalWriteable(relocationTargetNode);

server/src/main/java/org/elasticsearch/cluster/routing/UnassignedInfo.java

@@ -77,11 +77,6 @@ public record UnassignedInfo(
     @Nullable String lastAllocatedNodeId
 ) implements ToXContentFragment, Writeable {
 
-    /**
-     * The version that the {@code lastAllocatedNode} field was added in. Used to adapt streaming of this class as appropriate for the
-     * version of the node sending/receiving it. Should be removed once wire compatibility with this version is no longer necessary.
-     */
-    private static final TransportVersion VERSION_LAST_ALLOCATED_NODE_ADDED = TransportVersions.V_7_15_0;
     private static final TransportVersion VERSION_UNPROMOTABLE_REPLICA_ADDED = TransportVersions.V_8_7_0;
 
     public static final DateFormatter DATE_TIME_FORMATTER = DateFormatter.forPattern("date_optional_time").withZone(ZoneOffset.UTC);
@@ -315,11 +310,7 @@ public static UnassignedInfo fromStreamInput(StreamInput in) throws IOException
         var lastAllocationStatus = AllocationStatus.readFrom(in);
         var failedNodeIds = in.readCollectionAsImmutableSet(StreamInput::readString);
         String lastAllocatedNodeId;
-        if (in.getTransportVersion().onOrAfter(VERSION_LAST_ALLOCATED_NODE_ADDED)) {
-            lastAllocatedNodeId = in.readOptionalString();
-        } else {
-            lastAllocatedNodeId = null;
-        }
+        lastAllocatedNodeId = in.readOptionalString();
         return new UnassignedInfo(
             reason,
             message,
@@ -335,9 +326,7 @@ public static UnassignedInfo fromStreamInput(StreamInput in) throws IOException
     }
 
     public void writeTo(StreamOutput out) throws IOException {
-        if (reason.equals(Reason.NODE_RESTARTING) && out.getTransportVersion().before(VERSION_LAST_ALLOCATED_NODE_ADDED)) {
-            out.writeByte((byte) Reason.NODE_LEFT.ordinal());
-        } else if (reason.equals(Reason.UNPROMOTABLE_REPLICA) && out.getTransportVersion().before(VERSION_UNPROMOTABLE_REPLICA_ADDED)) {
+        if (reason.equals(Reason.UNPROMOTABLE_REPLICA) && out.getTransportVersion().before(VERSION_UNPROMOTABLE_REPLICA_ADDED)) {
             out.writeByte((byte) Reason.PRIMARY_FAILED.ordinal());
         } else if (reason.equals(Reason.RESHARD_ADDED)
             && out.getTransportVersion().before(TransportVersions.UNASSIGENEDINFO_RESHARD_ADDED)) {
@@ -355,9 +344,7 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVInt(failedAllocations);
         lastAllocationStatus.writeTo(out);
         out.writeStringCollection(failedNodeIds);
-        if (out.getTransportVersion().onOrAfter(VERSION_LAST_ALLOCATED_NODE_ADDED)) {
-            out.writeOptionalString(lastAllocatedNodeId);
-        }
+        out.writeOptionalString(lastAllocatedNodeId);
     }
 
     /**

server/src/main/java/org/elasticsearch/indices/recovery/RecoverySettings.java

@@ -13,8 +13,6 @@
 import org.apache.logging.log4j.Logger;
 import org.apache.lucene.store.RateLimiter;
 import org.apache.lucene.store.RateLimiter.SimpleRateLimiter;
-import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodeRole;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -50,7 +48,6 @@
 
 public class RecoverySettings {
     public static final IndexVersion SNAPSHOT_RECOVERIES_SUPPORTED_INDEX_VERSION = IndexVersions.V_7_15_0;
-    public static final TransportVersion SNAPSHOT_RECOVERIES_SUPPORTED_TRANSPORT_VERSION = TransportVersions.V_7_15_0;
     public static final IndexVersion SEQ_NO_SNAPSHOT_RECOVERIES_SUPPORTED_VERSION = IndexVersions.V_7_16_0;
 
     private static final Logger logger = LogManager.getLogger(RecoverySettings.class);

server/src/main/java/org/elasticsearch/indices/recovery/RecoverySnapshotFileRequest.java

@@ -45,8 +45,6 @@ public RecoverySnapshotFileRequest(StreamInput in) throws IOException {
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
-        assert out.getTransportVersion().onOrAfter(RecoverySettings.SNAPSHOT_RECOVERIES_SUPPORTED_TRANSPORT_VERSION)
-            : "Unexpected serialization version " + out.getTransportVersion();
         super.writeTo(out);
         out.writeString(repository);
         indexId.writeTo(out);

server/src/main/java/org/elasticsearch/indices/recovery/RecoveryState.java

@@ -642,9 +642,7 @@ public FileDetail(StreamInput in) throws IOException {
             length = in.readVLong();
             recovered = in.readVLong();
             reused = in.readBoolean();
-            if (in.getTransportVersion().onOrAfter(RecoverySettings.SNAPSHOT_RECOVERIES_SUPPORTED_TRANSPORT_VERSION)) {
-                recoveredFromSnapshot = in.readLong();
-            }
+            recoveredFromSnapshot = in.readLong();
         }
 
         @Override
@@ -653,9 +651,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeVLong(length);
             out.writeVLong(recovered);
             out.writeBoolean(reused);
-            if (out.getTransportVersion().onOrAfter(RecoverySettings.SNAPSHOT_RECOVERIES_SUPPORTED_TRANSPORT_VERSION)) {
-                out.writeLong(recoveredFromSnapshot);
-            }
+            out.writeLong(recoveredFromSnapshot);
         }
 
         void addRecoveredBytes(long bytes) {

x-pack/plugin/core/src/main/java/org/elasticsearch/license/GetFeatureUsageResponse.java

@@ -7,7 +7,6 @@
 
 package org.elasticsearch.license;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -51,11 +50,7 @@ public FeatureUsageInfo(StreamInput in) throws IOException {
             this.family = in.readOptionalString();
             this.name = in.readString();
             this.lastUsedTime = ZonedDateTime.ofInstant(Instant.ofEpochSecond(in.readLong()), ZoneOffset.UTC);
-            if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-                this.context = in.readOptionalString();
-            } else {
-                this.context = null;
-            }
+            this.context = in.readOptionalString();
             this.licenseLevel = in.readString();
         }
 
@@ -64,9 +59,7 @@ public void writeTo(StreamOutput out) throws IOException {
             out.writeOptionalString(this.family);
             out.writeString(name);
             out.writeLong(lastUsedTime.toEpochSecond());
-            if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-                out.writeOptionalString(this.context);
-            }
+            out.writeOptionalString(this.context);
             out.writeString(licenseLevel);
         }
 

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/async/AsyncTaskIndexService.java

@@ -12,7 +12,6 @@
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.ResourceNotFoundException;
 import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.DocWriteResponse;
@@ -327,9 +326,7 @@ private void addResultFieldAndFinish(Writeable response, XContentBuilder source)
             os = Streams.noCloseStream(os);
             TransportVersion minNodeVersion = clusterService.state().getMinTransportVersion();
             TransportVersion.writeVersion(minNodeVersion, new OutputStreamStreamOutput(os));
-            if (minNodeVersion.onOrAfter(TransportVersions.V_7_15_0)) {
-                os = CompressorFactory.COMPRESSOR.threadLocalOutputStream(os);
-            }
+            os = CompressorFactory.COMPRESSOR.threadLocalOutputStream(os);
             try (OutputStreamStreamOutput out = new OutputStreamStreamOutput(os)) {
                 out.setTransportVersion(minNodeVersion);
                 response.writeTo(out);
@@ -580,11 +577,7 @@ public int read() {
         TransportVersion version = TransportVersion.readVersion(new InputStreamStreamInput(encodedIn));
         assert version.onOrBefore(TransportVersion.current()) : version + " >= " + TransportVersion.current();
         final StreamInput input;
-        if (version.onOrAfter(TransportVersions.V_7_15_0)) {
-            input = CompressorFactory.COMPRESSOR.threadLocalStreamInput(encodedIn);
-        } else {
-            input = new InputStreamStreamInput(encodedIn);
-        }
+        input = CompressorFactory.COMPRESSOR.threadLocalStreamInput(encodedIn);
         try (StreamInput in = new NamedWriteableAwareStreamInput(input, registry)) {
             in.setTransportVersion(version);
             return reader.read(in);

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/termsenum/action/NodeTermsEnumRequest.java

@@ -6,7 +6,6 @@
  */
 package org.elasticsearch.xpack.core.termsenum.action;
 
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.IndicesRequest;
 import org.elasticsearch.action.OriginalIndices;
 import org.elasticsearch.action.support.IndicesOptions;
@@ -78,12 +77,7 @@ public NodeTermsEnumRequest(StreamInput in) throws IOException {
         for (int i = 0; i < numShards; i++) {
             shardIds.add(new ShardId(in));
         }
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_15_1)) {
-            originalIndices = OriginalIndices.readOriginalIndices(in);
-        } else {
-            String[] indicesNames = shardIds.stream().map(ShardId::getIndexName).distinct().toArray(String[]::new);
-            this.originalIndices = new OriginalIndices(indicesNames, null);
-        }
+        originalIndices = OriginalIndices.readOriginalIndices(in);
     }
 
     @Override
@@ -106,9 +100,7 @@ public void writeTo(StreamOutput out) throws IOException {
         for (ShardId shardId : shardIds) {
             shardId.writeTo(out);
         }
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_15_1)) {
-            OriginalIndices.writeOriginalIndices(originalIndices, out);
-        }
+        OriginalIndices.writeOriginalIndices(originalIndices, out);
     }
 
     public String field() {

x-pack/plugin/core/src/test/java/org/elasticsearch/license/GetFeatureUsageResponseTests.java

@@ -8,12 +8,10 @@
 package org.elasticsearch.license;
 
 import org.elasticsearch.TransportVersion;
-import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.license.GetFeatureUsageResponse.FeatureUsageInfo;
 import org.elasticsearch.test.ESTestCase;
-import org.elasticsearch.test.TransportVersionUtils;
 
 import java.io.IOException;
 import java.time.ZoneOffset;
@@ -46,10 +44,6 @@ public void assertStreamInputOutput(TransportVersion version, String family, Str
         assertThat(fui2.getLicenseLevel(), equalTo("gold"));
     }
 
-    public void testPre715StreamFormat() throws IOException {
-        assertStreamInputOutput(TransportVersionUtils.getPreviousVersion(TransportVersions.V_7_15_0), null, null);
-    }
-
     public void testStreamFormat() throws IOException {
         assertStreamInputOutput(TransportVersion.current(), "family", "context");
         // family and context are optional

x-pack/plugin/eql/src/main/java/org/elasticsearch/xpack/eql/action/EqlSearchRequest.java

@@ -121,9 +121,7 @@ public EqlSearchRequest(StreamInput in) throws IOException {
         size = in.readVInt();
         fetchSize = in.readVInt();
         query = in.readString();
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-            this.ccsMinimizeRoundtrips = in.readBoolean();
-        }
+        this.ccsMinimizeRoundtrips = in.readBoolean();
         this.waitForCompletionTimeout = in.readOptionalTimeValue();
         this.keepAlive = in.readOptionalTimeValue();
         this.keepOnCompletion = in.readBoolean();
@@ -482,9 +480,7 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVInt(size);
         out.writeVInt(fetchSize);
         out.writeString(query);
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_7_15_0)) {
-            out.writeBoolean(ccsMinimizeRoundtrips);
-        }
+        out.writeBoolean(ccsMinimizeRoundtrips);
         out.writeOptionalTimeValue(waitForCompletionTimeout);
         out.writeOptionalTimeValue(keepAlive);
         out.writeBoolean(keepOnCompletion);

x-pack/plugin/eql/src/test/java/org/elasticsearch/xpack/eql/action/EqlSearchRequestTests.java

@@ -129,7 +129,7 @@ protected EqlSearchRequest mutateInstanceForVersion(EqlSearchRequest instance, T
         mutatedInstance.size(instance.size());
         mutatedInstance.fetchSize(instance.fetchSize());
         mutatedInstance.query(instance.query());
-        mutatedInstance.ccsMinimizeRoundtrips(version.onOrAfter(TransportVersions.V_7_15_0) == false || instance.ccsMinimizeRoundtrips());
+        mutatedInstance.ccsMinimizeRoundtrips(instance.ccsMinimizeRoundtrips());
         mutatedInstance.waitForCompletionTimeout(instance.waitForCompletionTimeout());
         mutatedInstance.keepAlive(instance.keepAlive());
         mutatedInstance.keepOnCompletion(instance.keepOnCompletion());

x-pack/plugin/search-business-rules/src/main/java/org/elasticsearch/xpack/searchbusinessrules/PinnedQueryBuilder.java

@@ -124,28 +124,19 @@ private PinnedQueryBuilder(QueryBuilder organicQuery, List<String> ids, List<Spe
      */
     public PinnedQueryBuilder(StreamInput in) throws IOException {
         super(in);
-        if (in.getTransportVersion().before(TransportVersions.V_7_15_0)) {
-            ids = in.readStringCollectionAsList();
-            docs = null;
-        } else {
-            ids = in.readOptionalStringCollectionAsList();
-            docs = in.readBoolean() ? in.readCollectionAsList(SpecifiedDocument::new) : null;
-        }
+        ids = in.readOptionalStringCollectionAsList();
+        docs = in.readBoolean() ? in.readCollectionAsList(SpecifiedDocument::new) : null;
         organicQuery = in.readNamedWriteable(QueryBuilder.class);
     }
 
     @Override
     protected void doWriteTo(StreamOutput out) throws IOException {
-        if (out.getTransportVersion().before(TransportVersions.V_7_15_0)) {
-            out.writeStringCollection(this.ids);
+        out.writeOptionalStringCollection(this.ids);
+        if (docs == null) {
+            out.writeBoolean(false);
         } else {
-            out.writeOptionalStringCollection(this.ids);
-            if (docs == null) {
-                out.writeBoolean(false);
-            } else {
-                out.writeBoolean(true);
-                out.writeCollection(docs);
-            }
+            out.writeBoolean(true);
+            out.writeCollection(docs);
         }
         out.writeNamedWriteable(organicQuery);
     }