private List<SingularityRequestParent> getRequestsWithDeployState(
      Iterable<SingularityRequestWithState> requests) {
    List<String> requestIds = Lists.newArrayList();
    for (SingularityRequestWithState requestWithState : requests) {
      requestIds.add(requestWithState.getRequest().getId());
    }

    List<SingularityRequestParent> parents = Lists.newArrayListWithCapacity(requestIds.size());

    Map<String, SingularityRequestDeployState> deployStates =
        deployManager.getRequestDeployStatesByRequestIds(requestIds);

    for (SingularityRequestWithState requestWithState : requests) {
      Optional<SingularityRequestDeployState> deployState =
          Optional.fromNullable(deployStates.get(requestWithState.getRequest().getId()));
      parents.add(
          new SingularityRequestParent(
              requestWithState.getRequest(),
              requestWithState.getState(),
              deployState,
              Optional.<SingularityDeploy>absent(),
              Optional.<SingularityDeploy>absent(),
              Optional.<SingularityPendingDeploy>absent()));
    }

    return parents;
  }
  private List<SingularityTaskRequest> checkForStaleScheduledTasks(
      List<SingularityPendingTask> pendingTasks, List<SingularityTaskRequest> taskRequests) {
    final Set<String> foundPendingTaskId = Sets.newHashSetWithExpectedSize(taskRequests.size());
    final Set<String> requestIds = Sets.newHashSetWithExpectedSize(taskRequests.size());

    for (SingularityTaskRequest taskRequest : taskRequests) {
      foundPendingTaskId.add(taskRequest.getPendingTask().getPendingTaskId().getId());
      requestIds.add(taskRequest.getRequest().getId());
    }

    for (SingularityPendingTask pendingTask : pendingTasks) {
      if (!foundPendingTaskId.contains(pendingTask.getPendingTaskId().getId())) {
        LOG.info("Removing stale pending task {}", pendingTask.getPendingTaskId());
        taskManager.deletePendingTask(pendingTask.getPendingTaskId());
      }
    }

    // TODO this check isn't necessary if we keep track better during deploys
    final Map<String, SingularityRequestDeployState> deployStates =
        deployManager.getRequestDeployStatesByRequestIds(requestIds);
    final List<SingularityTaskRequest> taskRequestsWithValidDeploys =
        Lists.newArrayListWithCapacity(taskRequests.size());

    for (SingularityTaskRequest taskRequest : taskRequests) {
      SingularityRequestDeployState requestDeployState =
          deployStates.get(taskRequest.getRequest().getId());

      if (!matchesDeploy(requestDeployState, taskRequest)) {
        LOG.info(
            "Removing stale pending task {} because the deployId did not match active/pending deploys {}",
            taskRequest.getPendingTask().getPendingTaskId(),
            requestDeployState);
        taskManager.deletePendingTask(taskRequest.getPendingTask().getPendingTaskId());
      } else {
        taskRequestsWithValidDeploys.add(taskRequest);
      }
    }

    return taskRequestsWithValidDeploys;
  }