} catch (FessSystemException e) {
            assertTrue(e.getMessage().contains("Not found"));
        }
    }

    // Test getThumbnailPathOption
    @Test
    public void test_getThumbnailPathOption() {
        String option = thumbnailManager.getThumbnailPathOption();
        assertNotNull(option);
        assertTrue(option.startsWith("-D" + Constants.FESS_THUMBNAIL_PATH + "="));

            } else {
                ownTmpDir = null;
            }
        }

        cmdList.add(ComponentUtil.getThumbnailManager().getThumbnailPathOption());

        if (!jvmOptions.isEmpty()) {
            jvmOptions.stream().filter(StringUtil::isNotBlank).forEach(cmdList::add);
        }

        cmdList.add(Crawler.class.getCanonicalName());

    }

    /**
     * Gets the system property option string for thumbnail path configuration.
     *
     * @return the property option string for JVM arguments
     */
    public String getThumbnailPathOption() {
        return "-D" + Constants.FESS_THUMBNAIL_PATH + "=" + baseDir.getAbsolutePath();
    }

    /**
     * Stores thumbnail generation tasks to the queue for processing.
     *