#fixed code
                                protected void manage(String driverVersion) {
        httpClient = new HttpClient(config());
        try (HttpClient wdmHttpClient = httpClient) {
            downloader = new Downloader(getDriverManagerType());

            if (isUnknown(driverVersion)) {
                driverVersion = resolveDriverVersion(driverVersion);
            }

            Optional<String> driverInCache = searchDriverInCache(driverVersion);
            String exportValue;
            if (driverInCache.isPresent() && !config().isOverride()) {
                log.debug("Driver {} {} found in cache", getDriverName(),
                        getDriverVersionLabel(driverVersion));
                storeVersionToDownload(driverVersion);
                exportValue = driverInCache.get();
            } else {
                exportValue = download(driverVersion);
            }

            exportDriver(exportValue);

        } catch (Exception e) {
            handleException(e, driverVersion);
        }
    }
#vulnerable code 
                                protected void manage(String driverVersion) {
        httpClient = new HttpClient(config());
        try (HttpClient wdmHttpClient = httpClient) {
            downloader = new Downloader(getDriverManagerType());

            if (isUnknown(driverVersion)) {
                driverVersion = resolveDriverVersion(driverVersion);
            }

            Optional<String> driverInCache = searchDriverInCache(driverVersion);
            String exportValue;
            if (driverInCache.isPresent() && !config().isOverride()) {
                log.debug("Driver {} {} found in cache", getDriverName(),
                        getLabel(driverVersion));
                storeVersionToDownload(driverVersion);
                exportValue = driverInCache.get();
            } else {
                exportValue = download(driverVersion);
            }

            exportDriver(exportValue);

        } catch (Exception e) {
            handleException(e, driverVersion);
        }
    } 
                            #location 21 
                            #vulnerability type THREAD_SAFETY_VIOLATION