if (messages != null && messages.size() > maxMessages) {
                int start = messages.size() - maxMessages;
                // Ensure trimmed history starts with a user message, not an assistant message
                if (start < messages.size() && ChatMessage.ROLE_ASSISTANT.equals(messages.get(start).getRole())) {
                    start = Math.max(0, start - 1);
                }

                }
            } catch (Exception e) {
                exceptions[readerCount] = e;
            }
        });

        // Start all threads
        for (Thread reader : readers) {
            reader.start();
        }
        writer.start();

        // Wait for completion
        for (Thread reader : readers) {
            reader.join();
        }
        writer.join();

        if (oldProcess != null) {
            destroyProcess(sessionId, oldProcess);
        }

        // Start the new process and add it to the map
        try {
            final JobProcess jobProcess = new JobProcess(pb.start(), bufferSize, outputCallback);
            runningProcessMap.put(sessionId, jobProcess);
            return jobProcess;
        } catch (final IOException e) {

    }

    /**
     * Displays the start crawling form.
     *
     * @return HTML response for the start crawling form
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse startCrawlingForm() {
        saveToken();
        return asHtml(path_AdminWizard_AdminWizardStartJsp).useForm(StartCrawlingForm.class);
    }

    /**
     * Starts the crawling process for all configured crawlers.

    }

    /**
     * Starts a scheduled job by ID.
     * When job logging is enabled, a pre-generated job log ID is returned in the response
     * as {@code jobLogId}. When job logging is disabled, {@code jobLogId} is {@code null}.
     *
     * @param id the ID of the scheduled job to start
     * @return JSON response with {@code jobLogId} (nullable) and status
     */

        session.addUserMessage("User 2");
        session.addAssistantMessage("Assistant 2");
        session.addUserMessage("User 3");
        session.addAssistantMessage("Assistant 3");

        // Trimming to 4 starts at index 2 which is user - no skip needed
        session.trimHistory(4);

        final List<ChatMessage> messages = session.getMessages();
        assertEquals(4, messages.size());

            cb.fetchFirst(fessConfig.getPageScheduledJobMaxFetchSizeAsInteger());
        });
    }

    /**
     * Starts all available scheduled jobs.
     * @param cron The cron scheduler.
     */
    public void start(final LaCron cron) {
        scheduledJobBhv.selectCursor(cb -> {
            cb.query().setAvailable_Equal(Constants.T);
            cb.query().addOrderBy_SortOrder_Asc();

                String expectedValue = "{labels." + expectedValuePart + "}";

                // Some fields may have different conventions, so we just check if it starts correctly
                assertTrue("Field " + field.getName() + " value '" + value + "' should be related to its name",
                        value.startsWith("{labels."));
            }
        }
    }

                }
                break;
            }

            if (activeCrawlerNum < multiprocessCrawlingCount) {
                // start crawling
                dataCrawlingThreadList.get(startedCrawlerNum).start();
                dataCrawlingThreadStatusList.set(startedCrawlerNum, Constants.RUNNING);
                startedCrawlerNum++;
                activeCrawlerNum++;

            }
        }

        return resultBuf.toString();

    }

    /**
     * Executes the suggest creator process.
     * This method constructs the command line arguments and starts the process.
     * @throws JobProcessingException if the process fails.
     */
    protected void executeSuggestCreator() {
        final List<String> cmdList = new ArrayList<>();