[Test] Ensure assertion run only once (elastic#131174) (elastic#131256)

The assertion runs inside the cluster state listener may run a second
time if the listener is not removed in time. It is possible that the
assertion no longer holds on the 2nd time due to cluster state changes.
There is no need to assert it more than once. This PR ensures assertion
runs only once by removing the listener right after it.

Resolves: elastic#130274

Author: ywangd

x-pack/plugin/ccr/src/internalClusterTest/java/org/elasticsearch/xpack/ccr/CcrRepositoryIT.java

@@ -21,6 +21,7 @@
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
 import org.elasticsearch.action.get.GetResponse;
 import org.elasticsearch.action.index.IndexRequest;
+import org.elasticsearch.action.support.ActionTestUtils;
 import org.elasticsearch.action.support.ActiveShardCount;
 import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.action.support.PlainActionFuture;
@@ -51,6 +52,7 @@
 import org.elasticsearch.snapshots.SnapshotId;
 import org.elasticsearch.snapshots.SnapshotShardSizeInfo;
 import org.elasticsearch.snapshots.SnapshotsInfoService;
+import org.elasticsearch.test.ClusterServiceUtils;
 import org.elasticsearch.test.transport.MockTransportService;
 import org.elasticsearch.transport.TransportActionProxy;
 import org.elasticsearch.transport.TransportService;
@@ -655,39 +657,39 @@ public void testCcrRepositoryFailsToFetchSnapshotShardSizes() throws Exception {
         try {
             final SnapshotsInfoService snapshotsInfoService = getFollowerCluster().getCurrentMasterNodeInstance(SnapshotsInfoService.class);
 
+            final ClusterService clusterService = getFollowerCluster().getCurrentMasterNodeInstance(ClusterService.class);
             final PlainActionFuture<Void> waitForAllShardSnapshotSizesFailures = new PlainActionFuture<>();
-            final ClusterStateListener listener = event -> {
-                if (RestoreInProgress.get(event.state()).isEmpty() == false && event.state().routingTable().hasIndex(followerIndex)) {
-                    try {
-                        final IndexRoutingTable indexRoutingTable = event.state().routingTable().index(followerIndex);
-                        // this assertBusy completes because the listener is added after the InternalSnapshotsInfoService
-                        // and ClusterService preserves the order of listeners.
-                        assertBusy(() -> {
-                            List<Long> sizes = indexRoutingTable.shardsWithState(ShardRoutingState.UNASSIGNED)
-                                .stream()
-                                .filter(shard -> shard.unassignedInfo().lastAllocationStatus() == AllocationStatus.FETCHING_SHARD_DATA)
-                                .sorted(Comparator.comparingInt(ShardRouting::getId))
-                                .map(shard -> snapshotsInfoService.snapshotShardSizes().getShardSize(shard))
-                                .filter(Objects::nonNull)
-                                .filter(size -> ShardRouting.UNAVAILABLE_EXPECTED_SHARD_SIZE == size)
-                                .collect(Collectors.toList());
-                            assertThat(sizes, hasSize(numberOfShards));
-                        });
-                        waitForAllShardSnapshotSizesFailures.onResponse(null);
-                    } catch (Exception e) {
-                        throw new AssertionError("Failed to retrieve all snapshot shard sizes", e);
-                    }
+            ClusterServiceUtils.addTemporaryStateListener(
+                clusterService,
+                state -> RestoreInProgress.get(state).isEmpty() == false && state.routingTable().hasIndex(followerIndex)
+            ).addListener(ActionTestUtils.assertNoFailureListener(ignore -> {
+                try {
+                    // This listener runs synchronously in the same thread so that clusterService.state() returns the same state
+                    // that satisfied the predicate.
+                    final IndexRoutingTable indexRoutingTable = clusterService.state().routingTable().index(followerIndex);
+                    // this assertBusy completes because the listener is added after the InternalSnapshotsInfoService
+                    // and ClusterService preserves the order of listeners.
+                    assertBusy(() -> {
+                        List<Long> sizes = indexRoutingTable.shardsWithState(ShardRoutingState.UNASSIGNED)
+                            .stream()
+                            .filter(shard -> shard.unassignedInfo().lastAllocationStatus() == AllocationStatus.FETCHING_SHARD_DATA)
+                            .sorted(Comparator.comparingInt(ShardRouting::getId))
+                            .map(shard -> snapshotsInfoService.snapshotShardSizes().getShardSize(shard))
+                            .filter(Objects::nonNull)
+                            .filter(size -> ShardRouting.UNAVAILABLE_EXPECTED_SHARD_SIZE == size)
+                            .collect(Collectors.toList());
+                        assertThat(sizes, hasSize(numberOfShards));
+                    });
+                    waitForAllShardSnapshotSizesFailures.onResponse(null);
+                } catch (Exception e) {
+                    throw new AssertionError("Failed to retrieve all snapshot shard sizes", e);
                 }
-            };
-
-            final ClusterService clusterService = getFollowerCluster().getCurrentMasterNodeInstance(ClusterService.class);
-            clusterService.addListener(listener);
+            }));
 
             logger.debug("--> creating follower index [{}]", followerIndex);
             followerClient().execute(PutFollowAction.INSTANCE, putFollow(leaderIndex, followerIndex, ActiveShardCount.NONE));
 
             waitForAllShardSnapshotSizesFailures.get(30L, TimeUnit.SECONDS);
-            clusterService.removeListener(listener);
 
             assertThat(simulatedFailures.get(), equalTo(numberOfShards));