elastic · arteam · Feb 7, 2022 · Feb 4, 2022
diff --git a/...rks/src/main/java/org/elasticsearch/benchmark/routing/allocation/AllocationBenchmark.java b/...rks/src/main/java/org/elasticsearch/benchmark/routing/allocation/AllocationBenchmark.java
@@ -156,7 +156,8 @@ public ClusterState measureAllocation() {
         while (clusterState.getRoutingNodes().hasUnassignedShards()) {
             clusterState = strategy.applyStartedShards(
                 clusterState,
-                StreamSupport.stream(clusterState.getRoutingNodes().spliterator(), false)
+                clusterState.getRoutingNodes()
+                    .stream()
                     .flatMap(shardRoutings -> StreamSupport.stream(shardRoutings.spliterator(), false))
                     .filter(ShardRouting::initializing)
                     .collect(Collectors.toList())

diff --git a/...usterTest/java/org/elasticsearch/cluster/routing/allocation/decider/MockDiskUsagesIT.java b/...usterTest/java/org/elasticsearch/cluster/routing/allocation/decider/MockDiskUsagesIT.java
@@ -34,7 +34,6 @@
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.stream.Collectors;
-import java.util.stream.StreamSupport;
 
 import static org.elasticsearch.cluster.routing.allocation.DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_FLOOD_STAGE_WATERMARK_SETTING;
 import static org.elasticsearch.cluster.routing.allocation.DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING;
@@ -74,10 +73,15 @@ public void testRerouteOccursOnDiskPassingHighWatermark() throws Exception {
             internalCluster().startNode(Settings.builder().put(Environment.PATH_DATA_SETTING.getKey(), createTempDir()));
         }
 
-        final List<String> nodeIds = StreamSupport.stream(
-            client().admin().cluster().prepareState().get().getState().getRoutingNodes().spliterator(),
-            false
-        ).map(RoutingNode::nodeId).collect(Collectors.toList());
+        final List<String> nodeIds = client().admin()
+            .cluster()
+            .prepareState()
+            .get()
+            .getState()
+            .getRoutingNodes()
+            .stream()
+            .map(RoutingNode::nodeId)
+            .collect(Collectors.toList());
 
         final MockInternalClusterInfoService clusterInfoService = getMockInternalClusterInfoService();
         clusterInfoService.setUpdateFrequency(TimeValue.timeValueMillis(200));
@@ -149,10 +153,15 @@ public void testAutomaticReleaseOfIndexBlock() throws Exception {
             internalCluster().startNode(Settings.builder().put(Environment.PATH_DATA_SETTING.getKey(), createTempDir()));
         }
 
-        final List<String> nodeIds = StreamSupport.stream(
-            client().admin().cluster().prepareState().get().getState().getRoutingNodes().spliterator(),
-            false
-        ).map(RoutingNode::nodeId).collect(Collectors.toList());
+        final List<String> nodeIds = client().admin()
+            .cluster()
+            .prepareState()
+            .get()
+            .getState()
+            .getRoutingNodes()
+            .stream()
+            .map(RoutingNode::nodeId)
+            .collect(Collectors.toList());
 
         final MockInternalClusterInfoService clusterInfoService = getMockInternalClusterInfoService();
         clusterInfoService.setUpdateFrequency(TimeValue.timeValueMillis(200));
@@ -270,10 +279,15 @@ public void testOnlyMovesEnoughShardsToDropBelowHighWatermark() throws Exception
                 )
         );
 
-        final List<String> nodeIds = StreamSupport.stream(
-            client().admin().cluster().prepareState().get().getState().getRoutingNodes().spliterator(),
-            false
-        ).map(RoutingNode::nodeId).collect(Collectors.toList());
+        final List<String> nodeIds = client().admin()
+            .cluster()
+            .prepareState()
+            .get()
+            .getState()
+            .getRoutingNodes()
+            .stream()
+            .map(RoutingNode::nodeId)
+            .collect(Collectors.toList());
 
         assertAcked(prepareCreate("test").setSettings(Settings.builder().put("number_of_shards", 6).put("number_of_replicas", 0)));
 
@@ -329,10 +343,15 @@ public void testDoesNotExceedLowWatermarkWhenRebalancing() throws Exception {
 
         final MockInternalClusterInfoService clusterInfoService = getMockInternalClusterInfoService();
 
-        final List<String> nodeIds = StreamSupport.stream(
-            client().admin().cluster().prepareState().get().getState().getRoutingNodes().spliterator(),
-            false
-        ).map(RoutingNode::nodeId).collect(Collectors.toList());
+        final List<String> nodeIds = client().admin()
+            .cluster()
+            .prepareState()
+            .get()
+            .getState()
+            .getRoutingNodes()
+            .stream()
+            .map(RoutingNode::nodeId)
+            .collect(Collectors.toList());
 
         internalCluster().getCurrentMasterNodeInstance(ClusterService.class).addListener(event -> {
             assertThat(event.state().getRoutingNodes().node(nodeIds.get(2)).size(), lessThanOrEqualTo(1));
@@ -437,10 +456,15 @@ public void testMovesShardsOffSpecificDataPathAboveWatermark() throws Exception
                 )
         );
 
-        final List<String> nodeIds = StreamSupport.stream(
-            client().admin().cluster().prepareState().get().getState().getRoutingNodes().spliterator(),
-            false
-        ).map(RoutingNode::nodeId).collect(Collectors.toList());
+        final List<String> nodeIds = client().admin()
+            .cluster()
+            .prepareState()
+            .get()
+            .getState()
+            .getRoutingNodes()
+            .stream()
+            .map(RoutingNode::nodeId)
+            .collect(Collectors.toList());
 
         assertAcked(prepareCreate("test").setSettings(Settings.builder().put("number_of_shards", 6).put("number_of_replicas", 0)));
 

diff --git a/...src/internalClusterTest/java/org/elasticsearch/indexlifecycle/IndexLifecycleActionIT.java b/...src/internalClusterTest/java/org/elasticsearch/indexlifecycle/IndexLifecycleActionIT.java
@@ -25,7 +25,6 @@
 
 import java.util.Set;
 import java.util.stream.Collectors;
-import java.util.stream.StreamSupport;
 
 import static org.elasticsearch.client.internal.Requests.clusterHealthRequest;
 import static org.elasticsearch.client.internal.Requests.createIndexRequest;
@@ -239,9 +238,7 @@ private String getLocalNodeId(String name) {
     }
 
     private void assertNodesPresent(RoutingNodes routingNodes, String... nodes) {
-        final Set<String> keySet = StreamSupport.stream(routingNodes.spliterator(), false)
-            .map(RoutingNode::nodeId)
-            .collect(Collectors.toSet());
+        final Set<String> keySet = routingNodes.stream().map(RoutingNode::nodeId).collect(Collectors.toSet());
         assertThat(keySet, containsInAnyOrder(nodes));
     }
 }
diff --git a/server/src/main/java/org/elasticsearch/cluster/routing/RoutingNodes.java b/server/src/main/java/org/elasticsearch/cluster/routing/RoutingNodes.java
@@ -27,6 +27,7 @@
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.shard.ShardId;
 
+import java.util.AbstractCollection;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -44,7 +45,6 @@
 import java.util.Set;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
-import java.util.stream.StreamSupport;
 
 /**
  * {@link RoutingNodes} represents a copy the routing information contained in the {@link ClusterState cluster state}.
@@ -60,7 +60,7 @@
  * <li> {@link #failShard} fails/cancels an assigned shard.
  * </ul>
  */
-public class RoutingNodes implements Iterable<RoutingNode> {
+public class RoutingNodes extends AbstractCollection<RoutingNode> {
 
     private final Map<String, RoutingNode> nodesToShards;
 
@@ -299,10 +299,7 @@ public Set<String> getAttributeValues(String attributeName) {
             : Thread.currentThread().getName() + " should be the master service thread";
         return attributeValuesByAttribute.computeIfAbsent(
             attributeName,
-            ignored -> StreamSupport.stream(this.spliterator(), false)
-                .map(r -> r.node().getAttributes().get(attributeName))
-                .filter(Objects::nonNull)
-                .collect(Collectors.toSet())
+            ignored -> stream().map(r -> r.node().getAttributes().get(attributeName)).filter(Objects::nonNull).collect(Collectors.toSet())
         );
     }
 
@@ -869,6 +866,7 @@ private ShardRouting movePrimaryToUnassignedAndDemoteToReplica(ShardRouting shar
     /**
      * Returns the number of routing nodes
      */
+    @Override
     public int size() {
         return nodesToShards.size();
     }

diff --git a/server/src/main/java/org/elasticsearch/cluster/routing/allocation/DiskThresholdMonitor.java b/server/src/main/java/org/elasticsearch/cluster/routing/allocation/DiskThresholdMonitor.java
@@ -47,7 +47,6 @@
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
-import java.util.stream.StreamSupport;
 
 /**
  * Listens for a node to go over the high watermark and kicks off an empty
@@ -375,7 +374,8 @@ public void onNewInfo(ClusterInfo info) {
         }
 
         // Generate a map of node name to ID so we can use it to look up node replacement targets
-        final Map<String, String> nodeNameToId = StreamSupport.stream(state.getRoutingNodes().spliterator(), false)
+        final Map<String, String> nodeNameToId = state.getRoutingNodes()
+            .stream()
             .collect(Collectors.toMap(rn -> rn.node().getName(), RoutingNode::nodeId, (s1, s2) -> s2));
 
         // Calculate both the source node id and the target node id of a "replace" type shutdown

diff --git a/.../src/test/java/org/elasticsearch/cluster/routing/allocation/AwarenessAllocationTests.java b/.../src/test/java/org/elasticsearch/cluster/routing/allocation/AwarenessAllocationTests.java
@@ -34,7 +34,6 @@
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.UnaryOperator;
-import java.util.stream.StreamSupport;
 
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.singletonList;
@@ -1098,7 +1097,8 @@ private void testExplanation(
             new ClusterSettings(settings, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
         );
 
-        final RoutingNode emptyNode = StreamSupport.stream(clusterState.getRoutingNodes().spliterator(), false)
+        final RoutingNode emptyNode = clusterState.getRoutingNodes()
+            .stream()
             .filter(RoutingNode::isEmpty)
             .findFirst()
             .orElseThrow(AssertionError::new);

diff --git a/server/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java b/server/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java
@@ -32,7 +32,6 @@
 
 import java.util.Collections;
 import java.util.List;
-import java.util.stream.StreamSupport;
 
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.singletonList;
@@ -205,12 +204,14 @@ public void testSameHostCheckWithExplain() {
                 new ClusterSettings(sameHostSetting, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
             );
 
-            final RoutingNode emptyNode = StreamSupport.stream(clusterState.getRoutingNodes().spliterator(), false)
+            final RoutingNode emptyNode = clusterState.getRoutingNodes()
+                .stream()
                 .filter(node -> node.getByShardId(unassignedShard.shardId()) == null)
                 .findFirst()
                 .orElseThrow(AssertionError::new);
 
-            final RoutingNode otherNode = StreamSupport.stream(clusterState.getRoutingNodes().spliterator(), false)
+            final RoutingNode otherNode = clusterState.getRoutingNodes()
+                .stream()
                 .filter(node -> node != emptyNode)
                 .findFirst()
                 .orElseThrow(AssertionError::new);

diff --git a/.../main/java/org/elasticsearch/xpack/autoscaling/storage/ReactiveStorageDeciderService.java b/.../main/java/org/elasticsearch/xpack/autoscaling/storage/ReactiveStorageDeciderService.java
@@ -344,7 +344,8 @@ boolean needsThisTier(ShardRouting shard, RoutingAllocation allocation) {
                 return false;
             }
             IndexMetadata indexMetadata = indexMetadata(shard, allocation);
-            Set<Decision.Type> decisionTypes = StreamSupport.stream(allocation.routingNodes().spliterator(), false)
+            Set<Decision.Type> decisionTypes = allocation.routingNodes()
+                .stream()
                 .map(
                     node -> dataTierAllocationDecider.shouldFilter(
                         indexMetadata,
@@ -369,7 +370,8 @@ boolean needsThisTier(ShardRouting shard, RoutingAllocation allocation) {
             allocation.debugDecision(true);
             try {
                 // check that it does not belong on any existing node, i.e., there must be only a tier like reason it cannot be allocated
-                return StreamSupport.stream(allocation.routingNodes().spliterator(), false)
+                return allocation.routingNodes()
+                    .stream()
                     .anyMatch(node -> isFilterTierOnlyDecision(allocationDeciders.canAllocate(shard, node, allocation), indexMetadata));
             } finally {
                 allocation.debugDecision(false);