}
                    } else {
                        logger.warn("Unable to list directory contents: directory={}", file.getAbsolutePath());
                    }
                }
                throw new ChildUrlsException(requestDataSet, this.getClass().getName() + "#getResponseData");
            } else {
                logger.warn("File not found or is special file: path={}", file != null ? file.getAbsolutePath() : uri);

        // Check for null bytes
        if (NULL_BYTE.matcher(path).find()) {
            log.warn("Path contains null bytes: {}", sanitizeForLog(path));
            throw new SmbException("Path contains null bytes");
        }

        // Check for control characters
        if (strictMode && CONTROL_CHARS.matcher(path).find()) {
            log.warn("Path contains control characters: {}", sanitizeForLog(path));

                logger.warn("Could not add document: url field is missing or null");
                return;
            }

            final String url = dataMap.get(fessConfig.getIndexFieldUrl()).toString();
            final CrawlerClient client = crawlerClientFactory.getClient(url);
            if (client == null) {

                    logger.warn("Could not close a process output stream.", e);
                } finally {
                    latch.countDown();
                }
            }, "ProcessCloser-output-" + sessionId).start();

            try {
                latch.await(streamCloseTimeout, TimeUnit.SECONDS);
            } catch (final InterruptedException e) {
                logger.warn("Interrupted to wait a process.", e);

            if (disniProvider.isAvailable()) {
                return disniProvider;
            }
            log.warn("DiSNI RDMA provider requested but not available");
            break;

        case "tcp":
            return new TcpRdmaProvider();

        default:
            log.warn("Unknown RDMA provider preference: {}", preference);
            break;
        }

        return null;
    }

    /**

                log.info("RDMA connection established to {}", delegate.getRemoteAddress());
            } catch (IOException e) {
                log.warn("Failed to establish RDMA connection: {}", e.getMessage());
                throw e;
            }
        }
    }

    /**
     * Checks if RDMA connection is available.
     *

                    }
                } else {
                    logger.warn("Failed to release operation lock: operation={}, status={}", operationName,
                            deleteResponse.getHttpStatusCode());
                }
            }
        } catch (final Exception e) {
            logger.warn("Failed to release operation lock: operation={}", operationName, e);
        }
    }

    /**

        if (synonymLoader.getSynonymMap() == null) {
            if (settings.getAsList("synonyms", null) != null) {
                logger.warn("synonyms values are empty.");
            } else if (settings.get("synonyms_path") != null) {
                logger.warn("synonyms_path[{}] is empty.", settings.get("synonyms_path"));
            } else {
                logger.debug("No synonym data.");
            }
        }

                                if (tempFile.exists() && !tempFile.delete()) {
                                    logger.warn("Failed to delete {}", tempFile.getAbsolutePath());
                                }
                            }
                        });
            } catch (final Exception e) {
                logger.warn("Failed to process request file: {}", form.requestFile.getFileName(), e);

                    }
                } catch (final Exception e) {
                    logger.warn("Failed to read a suggest bad word: {}", list, e);
                }
            }
            searchEngineClient.refresh("_all"); // TODO replace _all
        } catch (final IOException e) {
            logger.warn("Failed to read a suggest bad word.", e);
        }
    }

    /**