[Remove] LegacyESVersion.V_7_6_* and V_7_7_* constants

Removes all usages of LegacyESVersion.V_7_6_ and LegacyESVersion.V_7_7_ version
constants along with ancient API logic.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>

modules/analysis-common/src/main/java/org/opensearch/analysis/common/CommonAnalysisModulePlugin.java

@@ -124,7 +124,7 @@
 import org.apache.lucene.analysis.tr.TurkishAnalyzer;
 import org.apache.lucene.analysis.util.ElisionFilter;
 import org.apache.lucene.util.SetOnce;
-import org.opensearch.LegacyESVersion;
+import org.opensearch.Version;
 import org.opensearch.client.Client;
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
 import org.opensearch.cluster.service.ClusterService;
@@ -347,7 +347,12 @@ public Map<String, AnalysisProvider<TokenizerFactory>> getTokenizers() {
         tokenizers.put("simple_pattern_split", SimplePatternSplitTokenizerFactory::new);
         tokenizers.put("thai", ThaiTokenizerFactory::new);
         tokenizers.put("nGram", (IndexSettings indexSettings, Environment environment, String name, Settings settings) -> {
-            if (indexSettings.getIndexVersionCreated().onOrAfter(LegacyESVersion.V_7_6_0)) {
+            if (indexSettings.getIndexVersionCreated().onOrAfter(Version.V_3_0_0)) {
+                throw new IllegalArgumentException(
+                    "The [nGram] tokenizer name was deprecated pre 1.0. "
+                        + "Please use the tokenizer name to [ngram] for indices created in versions 3.0 or higher instead."
+                );
+            } else {
                 deprecationLogger.deprecate(
                     "nGram_tokenizer_deprecation",
                     "The [nGram] tokenizer name is deprecated and will be removed in a future version. "
@@ -358,7 +363,12 @@ public Map<String, AnalysisProvider<TokenizerFactory>> getTokenizers() {
         });
         tokenizers.put("ngram", NGramTokenizerFactory::new);
         tokenizers.put("edgeNGram", (IndexSettings indexSettings, Environment environment, String name, Settings settings) -> {
-            if (indexSettings.getIndexVersionCreated().onOrAfter(LegacyESVersion.V_7_6_0)) {
+            if (indexSettings.getIndexVersionCreated().onOrAfter(Version.V_3_0_0)) {
+                throw new IllegalArgumentException(
+                    "The [edgeNGram] tokenizer name was deprecated pre 1.0. "
+                        + "Please use the tokenizer name to [edge_ngram] for indices created in versions 3.0 or higher instead."
+                );
+            } else {
                 deprecationLogger.deprecate(
                     "edgeNGram_tokenizer_deprecation",
                     "The [edgeNGram] tokenizer name is deprecated and will be removed in a future version. "
@@ -606,7 +616,12 @@ public List<PreConfiguredTokenizer> getPreConfiguredTokenizers() {
 
         // Temporary shim for aliases. TODO deprecate after they are moved
         tokenizers.add(PreConfiguredTokenizer.openSearchVersion("nGram", (version) -> {
-            if (version.onOrAfter(LegacyESVersion.V_7_6_0)) {
+            if (version.onOrAfter(Version.V_3_0_0)) {
+                throw new IllegalArgumentException(
+                    "The [nGram] tokenizer name was deprecated pre 1.0. "
+                        + "Please use the tokenizer name to [ngram] for indices created in versions 3.0 or higher instead."
+                );
+            } else {
                 deprecationLogger.deprecate(
                     "nGram_tokenizer_deprecation",
                     "The [nGram] tokenizer name is deprecated and will be removed in a future version. "
@@ -616,7 +631,12 @@ public List<PreConfiguredTokenizer> getPreConfiguredTokenizers() {
             return new NGramTokenizer();
         }));
         tokenizers.add(PreConfiguredTokenizer.openSearchVersion("edgeNGram", (version) -> {
-            if (version.onOrAfter(LegacyESVersion.V_7_6_0)) {
+            if (version.onOrAfter(Version.V_3_0_0)) {
+                throw new IllegalArgumentException(
+                    "The [edgeNGram] tokenizer name was deprecated pre 1.0. "
+                        + "Please use the tokenizer name to [edge_ngram] for indices created in versions 3.0 or higher instead."
+                );
+            } else {
                 deprecationLogger.deprecate(
                     "edgeNGram_tokenizer_deprecation",
                     "The [edgeNGram] tokenizer name is deprecated and will be removed in a future version. "

modules/analysis-common/src/main/java/org/opensearch/analysis/common/ConcatenateGraphTokenFilterFactory.java

@@ -11,7 +11,6 @@
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.analysis.miscellaneous.ConcatenateGraphFilter;
 import org.apache.lucene.util.automaton.TooComplexToDeterminizeException;
-import org.opensearch.LegacyESVersion;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.env.Environment;
 import org.opensearch.index.IndexSettings;
@@ -24,11 +23,6 @@
  * max_graph_expansions is 100 as the default value of 10_000 seems to be unnecessarily large and preserve_separator is false.
  *
  * <ul>
- *   <li>preserve_separator:
- *       For LegacyESVersion lesser than {@link LegacyESVersion#V_7_6_0} i.e. lucene versions lesser
- *       than {@link org.apache.lucene.util.Version#LUCENE_8_4_0}
- *       Whether {@link ConcatenateGraphFilter#SEP_LABEL} should separate the input tokens in the concatenated token.
- *       </li>
  *   <li>token_separator:
  *       Separator to use for concatenation. Must be a String with a single character or empty.
  *       If not present, {@link ConcatenateGraphTokenFilterFactory#DEFAULT_TOKEN_SEPARATOR} will be used.
@@ -59,17 +53,11 @@ public class ConcatenateGraphTokenFilterFactory extends AbstractTokenFilterFacto
     ConcatenateGraphTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
         super(indexSettings, name, settings);
 
-        if (indexSettings.getIndexVersionCreated().onOrAfter(LegacyESVersion.V_7_6_0)) { // i.e. Lucene 8.4.0
-            String separator = settings.get("token_separator", DEFAULT_TOKEN_SEPARATOR);
-            if (separator.length() > 1) {
-                throw new IllegalArgumentException("token_separator must be either empty or a single character");
-            }
-            tokenSeparator = separator.length() == 0 ? null : separator.charAt(0); // null means no separator while concatenating
-        } else {
-            boolean preserveSep = settings.getAsBoolean("preserve_separator", ConcatenateGraphFilter.DEFAULT_PRESERVE_SEP);
-            tokenSeparator = preserveSep ? ConcatenateGraphFilter.DEFAULT_TOKEN_SEPARATOR : null;
+        String separator = settings.get("token_separator", DEFAULT_TOKEN_SEPARATOR);
+        if (separator.length() > 1) {
+            throw new IllegalArgumentException("token_separator must be either empty or a single character");
         }
-
+        tokenSeparator = separator.length() == 0 ? null : separator.charAt(0); // null means no separator while concatenating
         maxGraphExpansions = settings.getAsInt("max_graph_expansions", DEFAULT_MAX_GRAPH_EXPANSIONS);
         preservePositionIncrements = settings.getAsBoolean("preserve_position_increments", DEFAULT_PRESERVE_POSITION_INCREMENTS);
     }

modules/geo/src/main/java/org/opensearch/geo/search/aggregations/bucket/composite/GeoTileGridValuesSourceBuilder.java

@@ -33,7 +33,6 @@
 package org.opensearch.geo.search.aggregations.bucket.composite;
 
 import org.apache.lucene.index.IndexReader;
-import org.opensearch.LegacyESVersion;
 import org.opensearch.common.ParseField;
 import org.opensearch.common.geo.GeoBoundingBox;
 import org.opensearch.common.geo.GeoPoint;
@@ -175,9 +174,7 @@ public static void register(ValuesSourceRegistry.Builder builder) {
     public GeoTileGridValuesSourceBuilder(StreamInput in) throws IOException {
         super(in);
         this.precision = in.readInt();
-        if (in.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            this.geoBoundingBox = new GeoBoundingBox(in);
-        }
+        this.geoBoundingBox = new GeoBoundingBox(in);
     }
 
     public GeoTileGridValuesSourceBuilder precision(int precision) {
@@ -198,9 +195,7 @@ public GeoTileGridValuesSourceBuilder format(String format) {
     @Override
     protected void innerWriteTo(StreamOutput out) throws IOException {
         out.writeInt(precision);
-        if (out.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            geoBoundingBox.writeTo(out);
-        }
+        geoBoundingBox.writeTo(out);
     }
 
     @Override

modules/geo/src/main/java/org/opensearch/geo/search/aggregations/bucket/geogrid/GeoGridAggregationBuilder.java

@@ -32,7 +32,6 @@
 
 package org.opensearch.geo.search.aggregations.bucket.geogrid;
 
-import org.opensearch.LegacyESVersion;
 import org.opensearch.OpenSearchException;
 import org.opensearch.common.ParseField;
 import org.opensearch.common.geo.GeoBoundingBox;
@@ -125,9 +124,7 @@ public GeoGridAggregationBuilder(StreamInput in) throws IOException {
         precision = in.readVInt();
         requiredSize = in.readVInt();
         shardSize = in.readVInt();
-        if (in.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            geoBoundingBox = new GeoBoundingBox(in);
-        }
+        geoBoundingBox = new GeoBoundingBox(in);
     }
 
     @Override
@@ -140,9 +137,7 @@ protected void innerWriteTo(StreamOutput out) throws IOException {
         out.writeVInt(precision);
         out.writeVInt(requiredSize);
         out.writeVInt(shardSize);
-        if (out.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            geoBoundingBox.writeTo(out);
-        }
+        geoBoundingBox.writeTo(out);
     }
 
     /**

modules/rank-eval/src/main/java/org/opensearch/index/rankeval/RankEvalRequest.java

@@ -32,7 +32,6 @@
 
 package org.opensearch.index.rankeval;
 
-import org.opensearch.LegacyESVersion;
 import org.opensearch.action.ActionRequest;
 import org.opensearch.action.ActionRequestValidationException;
 import org.opensearch.action.IndicesRequest;
@@ -69,9 +68,7 @@ public RankEvalRequest(RankEvalSpec rankingEvaluationSpec, String[] indices) {
         rankingEvaluationSpec = new RankEvalSpec(in);
         indices = in.readStringArray();
         indicesOptions = IndicesOptions.readIndicesOptions(in);
-        if (in.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            searchType = SearchType.fromId(in.readByte());
-        }
+        searchType = SearchType.fromId(in.readByte());
     }
 
     RankEvalRequest() {}
@@ -150,9 +147,7 @@ public void writeTo(StreamOutput out) throws IOException {
         rankingEvaluationSpec.writeTo(out);
         out.writeStringArray(indices);
         indicesOptions.writeIndicesOptions(out);
-        if (out.getVersion().onOrAfter(LegacyESVersion.V_7_6_0)) {
-            out.writeByte(searchType.id());
-        }
+        out.writeByte(searchType.id());
     }
 
     @Override

qa/rolling-upgrade/src/test/java/org/opensearch/upgrades/RecoveryIT.java

@@ -764,12 +764,8 @@ public void testAutoExpandIndicesDuringRollingUpgrade() throws Exception {
 
         final int numberOfReplicas = Integer.parseInt(
             getIndexSettingsAsMap(indexName).get(IndexMetadata.SETTING_NUMBER_OF_REPLICAS).toString());
-        if (minimumNodeVersion.onOrAfter(LegacyESVersion.V_7_6_0)) {
-            assertEquals(nodes.size() - 2, numberOfReplicas);
-            ensureGreen(indexName);
-        } else {
-            assertEquals(nodes.size() - 1, numberOfReplicas);
-        }
+        assertEquals(nodes.size() - 2, numberOfReplicas);
+        ensureGreen(indexName);
     }
 
     public void testSoftDeletesDisabledWarning() throws Exception {

server/src/main/java/org/opensearch/LegacyESVersion.java

@@ -48,11 +48,6 @@
  */
 public class LegacyESVersion extends Version {
 
-    public static final LegacyESVersion V_7_6_0 = new LegacyESVersion(7060099, org.apache.lucene.util.Version.LUCENE_8_4_0);
-    public static final LegacyESVersion V_7_6_1 = new LegacyESVersion(7060199, org.apache.lucene.util.Version.LUCENE_8_4_0);
-    public static final LegacyESVersion V_7_6_2 = new LegacyESVersion(7060299, org.apache.lucene.util.Version.LUCENE_8_4_0);
-    public static final LegacyESVersion V_7_7_0 = new LegacyESVersion(7070099, org.apache.lucene.util.Version.LUCENE_8_5_1);
-    public static final LegacyESVersion V_7_7_1 = new LegacyESVersion(7070199, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final LegacyESVersion V_7_8_0 = new LegacyESVersion(7080099, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final LegacyESVersion V_7_8_1 = new LegacyESVersion(7080199, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final LegacyESVersion V_7_9_0 = new LegacyESVersion(7090099, org.apache.lucene.util.Version.LUCENE_8_6_0);

server/src/main/java/org/opensearch/action/admin/cluster/node/info/NodesInfoRequest.java

@@ -32,7 +32,6 @@
 
 package org.opensearch.action.admin.cluster.node.info;
 
-import org.opensearch.LegacyESVersion;
 import org.opensearch.action.support.nodes.BaseNodesRequest;
 import org.opensearch.common.io.stream.StreamInput;
 import org.opensearch.common.io.stream.StreamOutput;
@@ -63,22 +62,7 @@ public class NodesInfoRequest extends BaseNodesRequest<NodesInfoRequest> {
     public NodesInfoRequest(StreamInput in) throws IOException {
         super(in);
         requestedMetrics.clear();
-        if (in.getVersion().before(LegacyESVersion.V_7_7_0)) {
-            // prior to version 8.x, a NodesInfoRequest was serialized as a list
-            // of booleans in a fixed order
-            optionallyAddMetric(in.readBoolean(), Metric.SETTINGS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.OS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.PROCESS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.JVM.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.THREAD_POOL.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.TRANSPORT.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.HTTP.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.PLUGINS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.INGEST.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.INDICES.metricName());
-        } else {
-            requestedMetrics.addAll(Arrays.asList(in.readStringArray()));
-        }
+        requestedMetrics.addAll(Arrays.asList(in.readStringArray()));
     }
 
     /**
@@ -165,22 +149,7 @@ private void optionallyAddMetric(boolean addMetric, String metricName) {
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
-        if (out.getVersion().before(LegacyESVersion.V_7_7_0)) {
-            // prior to version 8.x, a NodesInfoRequest was serialized as a list
-            // of booleans in a fixed order
-            out.writeBoolean(Metric.SETTINGS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.OS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.PROCESS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.JVM.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.THREAD_POOL.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.TRANSPORT.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.HTTP.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.PLUGINS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.INGEST.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.INDICES.containedIn(requestedMetrics));
-        } else {
-            out.writeStringArray(requestedMetrics.toArray(new String[0]));
-        }
+        out.writeStringArray(requestedMetrics.toArray(new String[0]));
     }
 
     /**

server/src/main/java/org/opensearch/action/admin/cluster/node/reload/NodesReloadSecureSettingsRequest.java

@@ -32,7 +32,6 @@
 
 package org.opensearch.action.admin.cluster.node.reload;
 
-import org.opensearch.LegacyESVersion;
 import org.opensearch.action.support.nodes.BaseNodesRequest;
 import org.opensearch.common.io.stream.StreamInput;
 
@@ -68,18 +67,16 @@ public NodesReloadSecureSettingsRequest() {
 
     public NodesReloadSecureSettingsRequest(StreamInput in) throws IOException {
         super(in);
-        if (in.getVersion().onOrAfter(LegacyESVersion.V_7_7_0)) {
-            final BytesReference bytesRef = in.readOptionalBytesReference();
-            if (bytesRef != null) {
-                byte[] bytes = BytesReference.toBytes(bytesRef);
-                try {
-                    this.secureSettingsPassword = new SecureString(CharArrays.utf8BytesToChars(bytes));
-                } finally {
-                    Arrays.fill(bytes, (byte) 0);
-                }
-            } else {
-                this.secureSettingsPassword = null;
+        final BytesReference bytesRef = in.readOptionalBytesReference();
+        if (bytesRef != null) {
+            byte[] bytes = BytesReference.toBytes(bytesRef);
+            try {
+                this.secureSettingsPassword = new SecureString(CharArrays.utf8BytesToChars(bytes));
+            } finally {
+                Arrays.fill(bytes, (byte) 0);
             }
+        } else {
+            this.secureSettingsPassword = null;
         }
     }
 

server/src/main/java/org/opensearch/action/admin/cluster/node/stats/NodesStatsRequest.java

@@ -32,7 +32,6 @@
 
 package org.opensearch.action.admin.cluster.node.stats;
 
-import org.opensearch.LegacyESVersion;
 import org.opensearch.action.admin.indices.stats.CommonStatsFlags;
 import org.opensearch.action.support.nodes.BaseNodesRequest;
 import org.opensearch.common.io.stream.StreamInput;
@@ -64,22 +63,7 @@ public NodesStatsRequest(StreamInput in) throws IOException {
 
         indices = new CommonStatsFlags(in);
         requestedMetrics.clear();
-        if (in.getVersion().before(LegacyESVersion.V_7_7_0)) {
-            optionallyAddMetric(in.readBoolean(), Metric.OS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.PROCESS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.JVM.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.THREAD_POOL.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.FS.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.TRANSPORT.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.HTTP.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.BREAKER.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.SCRIPT.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.DISCOVERY.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.INGEST.metricName());
-            optionallyAddMetric(in.readBoolean(), Metric.ADAPTIVE_SELECTION.metricName());
-        } else {
-            requestedMetrics.addAll(in.readStringList());
-        }
+        requestedMetrics.addAll(in.readStringList());
     }
 
     /**
@@ -200,22 +184,7 @@ private void optionallyAddMetric(boolean includeMetric, String metricName) {
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         indices.writeTo(out);
-        if (out.getVersion().before(LegacyESVersion.V_7_7_0)) {
-            out.writeBoolean(Metric.OS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.PROCESS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.JVM.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.THREAD_POOL.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.FS.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.TRANSPORT.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.HTTP.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.BREAKER.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.SCRIPT.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.DISCOVERY.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.INGEST.containedIn(requestedMetrics));
-            out.writeBoolean(Metric.ADAPTIVE_SELECTION.containedIn(requestedMetrics));
-        } else {
-            out.writeStringArray(requestedMetrics.toArray(new String[0]));
-        }
+        out.writeStringArray(requestedMetrics.toArray(new String[0]));
     }
 
     /**