private static void reportTooManyUnidentifiedSubmissions(Map<String, Integer> traces) {
    String mostFrequentTraces = EntryStream
      .of(traces)
      .sortedByInt(e -> -e.getValue())
      .map(e -> e.getValue() + " occurrences of " + e.getKey())
      .limit(10)
      .joining("\n\n");

    if (LOG.isDebugEnabled()) {
      LOG.debug(mostFrequentTraces);
    }
    Attachment attachment = new Attachment("diagnostic.txt", mostFrequentTraces);
    attachment.setIncluded(true);
    LOG.error(TOO_MANY_NON_BLOCKING_READ_ACTIONS_SUBMITTED_AT_ONCE + ". " + SUGGESTIONS, attachment);
  }
private static void reportTooManyUnidentifiedSubmissions(Map<String, Integer> traces)