if (userId != null && !userId.equals(sessionUserId)) {
            logger.warn("Cannot clear session, userId mismatch. sessionId={}, requestUserId={}", sessionId, userId);
            return false;
        }
        if (userId == null && sessionUserId != null) {
            logger.warn("Cannot clear session, userId mismatch (null vs non-null). sessionId={}, sessionUserId={}", sessionId,

     */
    protected enum Result {
        /** Thumbnail was successfully generated */
        OK,
        /** Thumbnail generation failed due to processing errors */
        FAILED,
        /** Image dimensions do not meet validation requirements */
        INVALID_SIZE,
        /** No valid image data was found in the input */
        NO_IMAGE;
    }

                } finally {
                    latch.countDown();
                }
            }, "ProcessCloser-error-" + sessionId).start();
            new Thread(() -> {
                try {
                    CloseableUtil.closeQuietly(process.getOutputStream());
                } catch (final Exception e) {

                if (task.isExecuted()) {
                    // Process was killed by the timer.
                    logger.warn("{} was timed out and destroyed.", getName());
                } else {
                    // Process finished normally.
                    final int exitValue = p.exitValue();
                    if (exitValue != 0) {
                        logger.warn("{} failed: exitCode={}, command={}", getName(), exitValue, commandList);

     *
     * @param connection RDMA connection that encountered error
     * @param error the error that occurred
     * @return true if error was handled and connection recovered, false if fallback needed
     */
    public boolean handleRdmaError(RdmaConnection connection, Exception error) {
        log.warn("RDMA error occurred: {}", error.getMessage());
        statistics.recordError();

        if (isRecoverableError(error)) {

        final LogEvent event = createLogEvent(Level.WARN, "org.codelibs.fess.test", "test warn message");
        warnAppender.append(event);

        final List<LogNotificationEvent> events = ComponentUtil.getLogNotificationHelper().drainAll();
        assertEquals(1, events.size());
        assertEquals("WARN", events.get(0).getLevel());

                    }, e -> {
                        logger.warn("Failed to open index: {}", docIndex, e);
                        coordinator.completeOperation("reload_doc_index");
                    }));
                }, e -> {
                    logger.warn("Failed to close index: {}", docIndex, e);
                    coordinator.completeOperation("reload_doc_index");

            if (e.getCause() == null) {
                logger.debug(e.getMessage());
            } else {
                logger.warn("Failed to process thumbnail: id={}", id, e);
            }
        } catch (final Exception e) {
            logger.warn("Failed to process thumbnail: id={}", id, e);
        }
        return false;
    }

    /**

         *
         * @param oldItem The original item from the dictionary.
         * @return The written item, or null if the item was deleted.
         * @throws DictionaryException if the file was updated concurrently.
         */
        public StemmerOverrideItem write(final StemmerOverrideItem oldItem) {
            try {

                        tempFile.getAbsolutePath());
            }
        } catch (final IOException e) {
            logger.warn("Failed to upload backup file: fileName={}, error={}", fileName, e.getMessage(), e);
            if (tempFile.exists() && !tempFile.delete()) {
                logger.warn("Failed to delete temporary file: {}", tempFile.getAbsolutePath());
            }