Source:
protected TransportReplicationAction(Settings settings, String actionName, TransportService transportService, ClusterService clusterService, IndicesService indicesService, ThreadPool threadPool, ShardStateAction shardStateAction, ActionFilters actionFilters, Writeable.Reader<Request> requestReader, Writeable.Reader<ReplicaRequest> replicaRequestReader, String executor, boolean syncGlobalCheckpointAfterOperation, boolean forceExecutionOnPrimary) { super(actionName, actionFilters, transportService.getTaskManager()); this.threadPool = threadPool; this.transportService = transportService; this.clusterService = clusterService; this.indicesService = indicesService; this.shardStateAction = shardStateAction; this.executor = executor; this.transportPrimaryAction = actionName + "[p]"; this.transportReplicaAction = actionName + "[r]"; this.initialRetryBackoffBound = REPLICATION_INITIAL_RETRY_BACKOFF_BOUND.get(settings); this.retryTimeout = REPLICATION_RETRY_TIMEOUT.get(settings); transportService.registerRequestHandler(actionName, ThreadPool.Names.SAME, requestReader, this::handleOperationRequest); transportService.registerRequestHandler(transportPrimaryAction, ThreadPool.Names.SAME, forceExecutionOnPrimary, true, in -> new ConcreteShardRequest<>(requestReader, in), this::handlePrimaryRequest); transportService.registerRequestHandler(transportReplicaAction, ThreadPool.Names.SAME, true, true, in -> new ConcreteReplicaRequest<>(replicaRequestReader, in), this::handleReplicaRequest); this.transportOptions = transportOptions(settings); this.syncGlobalCheckpointAfterOperation = syncGlobalCheckpointAfterOperation; ClusterSettings clusterSettings = clusterService.getClusterSettings(); clusterSettings.addSettingsUpdateConsumer(REPLICATION_INITIAL_RETRY_BACKOFF_BOUND, (v) -> initialRetryBackoffBound = v); clusterSettings.addSettingsUpdateConsumer(REPLICATION_RETRY_TIMEOUT, (v) -> retryTimeout = v); }

Target:
protected TransportReplicationAction(Settings settings, String actionName, TransportService transportService, ClusterService clusterService, IndicesService indicesService, ThreadPool threadPool, ShardStateAction shardStateAction, ActionFilters actionFilters, Writeable.Reader<Request> requestReader, Writeable.Reader<ReplicaRequest> replicaRequestReader, String executor, boolean syncGlobalCheckpointAfterOperation, boolean forceExecutionOnPrimary) { super(actionName, actionFilters, transportService.getTaskManager()); this.threadPool = threadPool; this.transportService = transportService; this.clusterService = clusterService; this.indicesService = indicesService; this.shardStateAction = shardStateAction; this.executor = executor; this.transportPrimaryAction = actionName + "[p]"; this.transportReplicaAction = actionName + "[r]"; this.initialRetryBackoffBound = REPLICATION_INITIAL_RETRY_BACKOFF_BOUND.get(settings); this.retryTimeout = REPLICATION_RETRY_TIMEOUT.get(settings); transportService.registerRequestHandler(actionName, ThreadPool.Names.SAME, requestReader, this::handleOperationRequest); transportService.registerRequestHandler(transportPrimaryAction, executor, forceExecutionOnPrimary, true, in -> new ConcreteShardRequest<>(requestReader, in), this::handlePrimaryRequest); transportService.registerRequestHandler(transportReplicaAction, executor, true, true, in -> new ConcreteReplicaRequest<>(replicaRequestReader, in), this::handleReplicaRequest); this.transportOptions = transportOptions(settings); this.syncGlobalCheckpointAfterOperation = syncGlobalCheckpointAfterOperation; ClusterSettings clusterSettings = clusterService.getClusterSettings(); clusterSettings.addSettingsUpdateConsumer(REPLICATION_INITIAL_RETRY_BACKOFF_BOUND, (v) -> initialRetryBackoffBound = v); clusterSettings.addSettingsUpdateConsumer(REPLICATION_RETRY_TIMEOUT, (v) -> retryTimeout = v); }