return "";
                case FessConfig.INDEX_ADMIN_DOUBLE_FIELDS:
                    return "";
                case FessConfig.INDEX_ADMIN_DATE_FIELDS:
                    return "expires,start_time,end_time";
                case FessConfig.INDEX_ADMIN_REQUIRED_FIELDS:
                    return "url,title,role,boost";
                case FessConfig.INDEX_ADMIN_ARRAY_FIELDS:
                    return "alerts,roles";

        configHelper.setReloadInterval(20L);

        long startTime = System.currentTimeMillis();
        configHelper.waitForNext();
        long endTime = System.currentTimeMillis();

        long elapsed = endTime - startTime;
        assertTrue("Expected at least 15ms sleep, got " + elapsed + "ms", elapsed >= 15);
        // Generous tolerance for CI environments like GitHub Actions

    //                                                                         ===========
    protected final ColumnInfo _columnEndTime = cci("endTime", "endTime", null, null, Long.class, "endTime", null, false, false, false,
            "Long", 0, 0, null, null, false, null, null, null, null, null, false);

            readerThreads[i] = new Thread(() -> {
                try {
                    startLatch.await(); // Wait for start signal
                    long endTime = System.currentTimeMillis() + testDurationMs;
                    while (System.currentTimeMillis() < endTime) {
                        observations[threadIndex].add(dataStore.alive);
                        Thread.yield(); // Allow other threads to run
                    }

                                                    <td><c:if test="${data.endTime!=null}">
                                                        <fmt:formatDate value="${fe:date(data.endTime)}"
                                                                        pattern="yyyy-MM-dd'T'HH:mm:ss"/>
                                                    </c:if> <c:if test="${data.endTime==null}">

            }
        });
        testThread.start();

        long startTime = System.currentTimeMillis();
        method.invoke(crawler, testThread);
        long endTime = System.currentTimeMillis();

        assertTrue("Thread should have been joined", endTime - startTime >= 100);
    }

    // Test destroyContainer private static method via reflection
    @Test
    public void test_destroyContainer() throws Exception {

                                    <tr>
                                        <th><la:message key="labels.joblog_endTime"/></th>
                                        <td>${f:h(endTime)}<la:hidden property="endTime"/></td>
                                    </tr>
                                    <tr>
                                        <th><la:message key="labels.joblog_scriptType"/></th>

        jobLog.setEndTime(System.currentTimeMillis());

        MonitorTarget target = new MonitorTarget(jobLog);
        try {
            target.expired();
            // Should not update when endTime is set - no exception expected
        } catch (Exception e) {
            // May fail due to missing client in test environment
            assertTrue(e.getMessage().contains("client"));
        }
    }

labels.userFavorite=Favorite Log
labels.userInfo=User Info
labels.webApiJson=JSON Response
labels.webConfigName=Web Crawl Config Name
labels.allLanguages=All Languages
labels.dictId=Dictionary ID
labels.docId=Document ID
labels.endTime=End Time
labels.hq=hq
labels.inputs=Inputs
labels.jobLogging=Logging
labels.jobName=Name
labels.jobStatus=Status
labels.labelTypeIds=Labels
labels.lang=Language
labels.outputs=Outputs

labels.threadName=執行緒名稱
labels.url=URL
labels.userFavorite=收藏日誌
labels.userInfo=使用者資訊
labels.webApiJson=JSON響應
labels.webConfigName=Web爬網配置名稱
labels.allLanguages=所有語言
labels.dictId=字典ID
labels.docId=文檔ID
labels.endTime=結束時間
labels.hq=hq
labels.inputs=輸入
labels.jobLogging=日誌記錄
labels.jobName=名稱
labels.jobStatus=狀態
labels.labelTypeIds=標籤
labels.lang=語言
labels.outputs=輸出
labels.pos=詞性
labels.purgeJobLogDay=刪除以前的作業日誌