private String getManagerQryResultInFailStatus(boolean proxyQry) {
        if (mgrConfig.getMetaQryFailCacheExpiredMs() <= 0) {
            return null;
        }
        Tuple2<AtomicLong, String> queryResult;
        if (proxyQry) {
            queryResult = fetchFailProxyMap.get(proxyQueryFailKey);
        } else {
            queryResult = fetchFailEncryptMap.get(encryptQueryFailKey);
        }
        if (queryResult != null
                && (System.currentTimeMillis() - queryResult.getF0().get() < mgrConfig
                        .getMetaQryFailCacheExpiredMs())) {
            return queryResult.getF1();
        }
        return null;
    }
try to read cache of proxy entry

@return read result
inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/config/ProxyConfigManager.java