if (Constants.FALSE.equals(initParamMap.getAsString(DELETE_OLD_DOCS))) {
                return;
            }
            final String sessionId = initParamMap.getAsString(Constants.SESSION_ID);
            if (StringUtil.isBlank(sessionId)) {
                logger.warn("Invalid sessionId at {}", dataConfig);
                return;
            }
            final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

     * Initiates crawling for specified web and file configurations.
     *
     * @param sessionId The session ID for this crawling operation
     * @param webConfigIdList List of web configuration IDs to crawl, null for all
     * @param fileConfigIdList List of file configuration IDs to crawl, null for all
     */
    public void crawl(final String sessionId, final List<String> webConfigIdList, final List<String> fileConfigIdList) {

        if (sessionId == null) { // create session id
            sessionId = RandomStringUtils.randomAlphabetic(15);
        }
        resultBuf.append("Session Id: ").append(sessionId).append("\n");
        if (jobExecutor != null) {
            jobExecutor.addShutdownListener(() -> ComponentUtil.getProcessHelper().destroyProcess(sessionId));
        }

    }

    // Test addFinishedSessionId
    public void test_addFinishedSessionId() {
        final String sessionId = "session123";
        indexUpdater.addFinishedSessionId(sessionId);
        assertTrue(indexUpdater.finishedSessionIdList.contains(sessionId));
    }

    // Test addFinishedSessionId with multiple sessions
    public void test_addFinishedSessionId_multiple() {

            "type" : "long"
          },
          "expiredTime" : {
            "type" : "long"
          },
          "name" : {
            "type" : "keyword"
          },
          "sessionId" : {
            "type" : "keyword"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1509021050413",
        "number_of_shards" : "5",

        // Flags at +16: server-to-redirector
        SMBUtil.writeInt4(0x00000001, buf, start + 16);
        // SessionId at +40 (sync header)
        SMBUtil.writeInt8(sessionId, buf, start + 40);
    }

    /**
     * Build a SESSION_SETUP response body with specified flags and security blob.
     * securityBufferOffset is set relative to header start.
     */

     * This is a required field that identifies the specific crawling session.
     * Maximum length is 20 characters.
     */
    @Required
    @Size(max = 20)
    public String sessionId;

    /**
     * The name or description of the crawling session.
     * This is an optional descriptive field with a maximum length of 20 characters.
     */
    @Size(max = 20)
    public String name;

     *
     * @return the sessionId
     */
    public long getSessionId() {
        return this.sessionId;
    }

    /**
     * @param sessionId
     *            the sessionId to set
     */
    @Override
    public final void setSessionId(final long sessionId) {
        this.sessionId = sessionId;
        if (this.next != null) {

            this.password = null;
        }
        // Also remove from secure key manager if we have a session
        if (this.sessionId != null) {
            keyManager.removeSessionKey(this.sessionId);
            this.sessionId = null;
        }
    }

    /**
     * Check if the authentication has expired based on TTL
     *
     * @return true if expired, false otherwise