code: @Override
    public void informAboutEvaluatorFailures(final Set<String> evaluatorIds) {
      for (String evaluatorId : evaluatorIds) {
        LOG.log(Level.WARNING, "Container [" + evaluatorId +
            "] has failed during driver restart process, FailedEvaluatorHandler will be triggered, but " +
            "no additional evaluator can be requested due to YARN-2433.");
        // trigger a failed evaluator event
        this.reefEventHandlers.onResourceStatus(ResourceStatusEventImpl.newBuilder()
            .setIdentifier(evaluatorId)
            .setState(State.FAILED)
            .setExitCode(1)
            .setDiagnostics("Container [" + evaluatorId + "] failed during driver restart process.")
            .build());
      }
    }
docs: Calls the appropriate handler via REEFEventHandlers, which is a runtime specific implementation
  of the YARN runtime.
  @param evaluatorIds the set of evaluator IDs of failed evaluators during restart.