Use disassociate in preference to deassociate (#37704)

Author: davidkyle

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

@@ -45,7 +45,7 @@
  * the delay marker). These are shards that have become unassigned due to a node leaving
  * and which were assigned the delay marker based on the index delay setting
  * {@link UnassignedInfo#INDEX_DELAYED_NODE_LEFT_TIMEOUT_SETTING}
- * (see {@link AllocationService#deassociateDeadNodes(RoutingAllocation)}).
+ * (see {@link AllocationService#disassociateDeadNodes(RoutingAllocation)}.
  * This class is responsible for choosing the next (closest) delay expiration of a
  * delayed shard to schedule a reroute to remove the delay marker.
  * The actual removal of the delay marker happens in

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

@@ -327,7 +327,7 @@ public ShardRouting activePrimary(ShardId shardId) {
      *
      */
     public ShardRouting activeReplicaWithHighestVersion(ShardId shardId) {
-        // It's possible for replicaNodeVersion to be null, when deassociating dead nodes
+        // It's possible for replicaNodeVersion to be null, when disassociating dead nodes
         // that have been removed, the shards are failed, and part of the shard failing
         // calls this method with an out-of-date RoutingNodes, where the version might not
         // be accessible. Therefore, we need to protect against the version being null

server/src/main/java/org/elasticsearch/cluster/routing/allocation/AllocationService.java

@@ -216,15 +216,15 @@ public ClusterState applyFailedShards(final ClusterState clusterState, final Lis
      * unassigned an shards that are associated with nodes that are no longer part of the cluster, potentially promoting replicas
      * if needed.
      */
-    public ClusterState deassociateDeadNodes(ClusterState clusterState, boolean reroute, String reason) {
+    public ClusterState disassociateDeadNodes(ClusterState clusterState, boolean reroute, String reason) {
         RoutingNodes routingNodes = getMutableRoutingNodes(clusterState);
         // shuffle the unassigned nodes, just so we won't have things like poison failed shards
         routingNodes.unassigned().shuffle();
         RoutingAllocation allocation = new RoutingAllocation(allocationDeciders, routingNodes, clusterState,
             clusterInfoService.getClusterInfo(), currentNanoTime());
 
         // first, clear from the shards any node id they used to belong to that is now dead
-        deassociateDeadNodes(allocation);
+        disassociateDeadNodes(allocation);
 
         if (allocation.routingNodesChanged()) {
             clusterState = buildResult(clusterState, allocation);
@@ -400,7 +400,7 @@ private boolean hasDeadNodes(RoutingAllocation allocation) {
     }
 
     private void reroute(RoutingAllocation allocation) {
-        assert hasDeadNodes(allocation) == false : "dead nodes should be explicitly cleaned up. See deassociateDeadNodes";
+        assert hasDeadNodes(allocation) == false : "dead nodes should be explicitly cleaned up. See disassociateDeadNodes";
         assert AutoExpandReplicas.getAutoExpandReplicaChanges(allocation.metaData(), allocation.nodes()).isEmpty() :
             "auto-expand replicas out of sync with number of nodes in the cluster";
 
@@ -414,7 +414,7 @@ private void reroute(RoutingAllocation allocation) {
         assert RoutingNodes.assertShardStats(allocation.routingNodes());
     }
 
-    private void deassociateDeadNodes(RoutingAllocation allocation) {
+    private void disassociateDeadNodes(RoutingAllocation allocation) {
         for (Iterator<RoutingNode> it = allocation.routingNodes().mutableIterator(); it.hasNext(); ) {
             RoutingNode node = it.next();
             if (allocation.nodes().getDataNodes().containsKey(node.nodeId())) {

server/src/main/java/org/elasticsearch/discovery/zen/NodeJoinController.java

@@ -510,8 +510,8 @@ private ClusterState.Builder becomeMasterAndTrimConflictingNodes(ClusterState cu
             ClusterState tmpState = ClusterState.builder(currentState).nodes(nodesBuilder).blocks(ClusterBlocks.builder()
                 .blocks(currentState.blocks())
                 .removeGlobalBlock(DiscoverySettings.NO_MASTER_BLOCK_ID)).build();
-            tmpState = PersistentTasksCustomMetaData.deassociateDeadNodes(tmpState);
-            return ClusterState.builder(allocationService.deassociateDeadNodes(tmpState, false,
+            tmpState = PersistentTasksCustomMetaData.disassociateDeadNodes(tmpState);
+            return ClusterState.builder(allocationService.disassociateDeadNodes(tmpState, false,
                 "removed dead nodes on election"));
         }
 

server/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java

@@ -632,8 +632,8 @@ public ClusterTasksResult<Task> execute(final ClusterState currentState, final L
                                                          masterNodes, electMasterService.minimumMasterNodes()));
                 return resultBuilder.build(currentState);
             } else {
-                ClusterState ptasksDisassociatedState = PersistentTasksCustomMetaData.deassociateDeadNodes(remainingNodesClusterState);
-                return resultBuilder.build(allocationService.deassociateDeadNodes(ptasksDisassociatedState, true, describeTasks(tasks)));
+                ClusterState ptasksDisassociatedState = PersistentTasksCustomMetaData.disassociateDeadNodes(remainingNodesClusterState);
+                return resultBuilder.build(allocationService.disassociateDeadNodes(ptasksDisassociatedState, true, describeTasks(tasks)));
             }
         }
 

server/src/main/java/org/elasticsearch/persistent/PersistentTasksCustomMetaData.java

@@ -225,7 +225,7 @@ public static <Params extends PersistentTaskParams> PersistentTask<Params> getTa
      * @return If no changes the argument {@code clusterState} is returned else
      *          a copy with the modified tasks
      */
-    public static ClusterState deassociateDeadNodes(ClusterState clusterState) {
+    public static ClusterState disassociateDeadNodes(ClusterState clusterState) {
         PersistentTasksCustomMetaData tasks = getPersistentTasksCustomMetaData(clusterState);
         if (tasks == null) {
             return clusterState;

server/src/test/java/org/elasticsearch/cluster/routing/DelayedAllocationServiceTests.java

@@ -104,7 +104,7 @@ public void testNoDelayedUnassigned() throws Exception {
             nodes.add(newNode("node3"));
         }
         clusterState = ClusterState.builder(clusterState).nodes(nodes).build();
-        clusterState = allocationService.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocationService.disassociateDeadNodes(clusterState, true, "reroute");
         ClusterState newState = clusterState;
         List<ShardRouting> unassignedShards = newState.getRoutingTable().shardsWithState(ShardRoutingState.UNASSIGNED);
         if (nodeAvailableForAllocation) {
@@ -153,7 +153,7 @@ public void testDelayedUnassignedScheduleReroute() throws Exception {
 
         // remove node that has replica and reroute
         clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove(nodeId)).build();
-        clusterState = allocationService.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocationService.disassociateDeadNodes(clusterState, true, "reroute");
         ClusterState stateWithDelayedShard = clusterState;
         // make sure the replica is marked as delayed (i.e. not reallocated)
         assertEquals(1, UnassignedInfo.getNumberOfDelayedUnassigned(stateWithDelayedShard));
@@ -264,7 +264,7 @@ public void testDelayedUnassignedScheduleRerouteAfterDelayedReroute() throws Exc
             .build();
         // make sure both replicas are marked as delayed (i.e. not reallocated)
         allocationService.setNanoTimeOverride(baseTimestampNanos);
-        clusterState = allocationService.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocationService.disassociateDeadNodes(clusterState, true, "reroute");
         final ClusterState stateWithDelayedShards = clusterState;
         assertEquals(2, UnassignedInfo.getNumberOfDelayedUnassigned(stateWithDelayedShards));
         RoutingNodes.UnassignedShards.UnassignedIterator iter = stateWithDelayedShards.getRoutingNodes().unassigned().iterator();
@@ -401,7 +401,7 @@ public void testDelayedUnassignedScheduleRerouteRescheduledOnShorterDelay() thro
         // remove node that has replica and reroute
         clusterState = ClusterState.builder(clusterState).nodes(
             DiscoveryNodes.builder(clusterState.nodes()).remove(nodeIdOfFooReplica)).build();
-        clusterState = allocationService.deassociateDeadNodes(clusterState, true, "fake node left");
+        clusterState = allocationService.disassociateDeadNodes(clusterState, true, "fake node left");
         ClusterState stateWithDelayedShard = clusterState;
         // make sure the replica is marked as delayed (i.e. not reallocated)
         assertEquals(1, UnassignedInfo.getNumberOfDelayedUnassigned(stateWithDelayedShard));
@@ -444,7 +444,7 @@ public void testDelayedUnassignedScheduleRerouteRescheduledOnShorterDelay() thro
             // remove node that has replica and reroute
             clusterState = ClusterState.builder(stateWithDelayedShard).nodes(
                 DiscoveryNodes.builder(stateWithDelayedShard.nodes()).remove(nodeIdOfBarReplica)).build();
-            ClusterState stateWithShorterDelay = allocationService.deassociateDeadNodes(clusterState, true, "fake node left");
+            ClusterState stateWithShorterDelay = allocationService.disassociateDeadNodes(clusterState, true, "fake node left");
             delayedAllocationService.setNanoTimeOverride(clusterChangeEventTimestampNanos);
             delayedAllocationService.clusterChanged(
                 new ClusterChangedEvent("fake node left", stateWithShorterDelay, stateWithDelayedShard));

server/src/test/java/org/elasticsearch/cluster/routing/UnassignedInfoTests.java

@@ -241,7 +241,7 @@ public void testNodeLeave() {
         assertThat(clusterState.getRoutingNodes().unassigned().size() > 0, equalTo(false));
         // remove node2 and reroute
         clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node2")).build();
-        clusterState = allocation.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocation.disassociateDeadNodes(clusterState, true, "reroute");
         // verify that NODE_LEAVE is the reason for meta
         assertThat(clusterState.getRoutingNodes().unassigned().size() > 0, equalTo(true));
         assertThat(clusterState.getRoutingNodes().shardsWithState(UNASSIGNED).size(), equalTo(1));
@@ -332,7 +332,7 @@ public void testNumberOfDelayedUnassigned() throws Exception {
         // remove node2 and reroute
         clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node2")).build();
         // make sure both replicas are marked as delayed (i.e. not reallocated)
-        clusterState = allocation.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocation.disassociateDeadNodes(clusterState, true, "reroute");
         assertThat(clusterState.toString(), UnassignedInfo.getNumberOfDelayedUnassigned(clusterState), equalTo(2));
     }
 
@@ -364,7 +364,7 @@ public void testFindNextDelayedAllocation() {
         final long baseTime = System.nanoTime();
         allocation.setNanoTimeOverride(baseTime);
         clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node2")).build();
-        clusterState = allocation.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = allocation.disassociateDeadNodes(clusterState, true, "reroute");
 
         final long delta = randomBoolean() ? 0 : randomInt((int) expectMinDelaySettingsNanos - 1);
 

server/src/test/java/org/elasticsearch/cluster/routing/allocation/AddIncrementallyTests.java

@@ -341,7 +341,7 @@ private ClusterState removeNodes(ClusterState clusterState, AllocationService se
         }
 
         clusterState = ClusterState.builder(clusterState).nodes(nodes.build()).build();
-        clusterState = service.deassociateDeadNodes(clusterState, true, "reroute");
+        clusterState = service.disassociateDeadNodes(clusterState, true, "reroute");
 
         logger.info("start all the primary shards, replicas will start initializing");
         RoutingNodes routingNodes = clusterState.getRoutingNodes();

server/src/test/java/org/elasticsearch/cluster/routing/allocation/BalanceConfigurationTests.java

@@ -181,7 +181,7 @@ private ClusterState removeNodes(ClusterState clusterState, AllocationService st
 
         clusterState = ClusterState.builder(clusterState).nodes(nodes.build()).build();
         if (removed) {
-            clusterState = strategy.deassociateDeadNodes(clusterState, randomBoolean(), "removed nodes");
+            clusterState = strategy.disassociateDeadNodes(clusterState, randomBoolean(), "removed nodes");
         }
 
         logger.info("start all the primary shards, replicas will start initializing");