try (DirContextHolder holder = getDirContext(() -> env)) {
                final DirContext context = holder.get();
                if (logger.isDebugEnabled()) {
                    logger.debug("Logged in as Bind DN. {}", context);
                }
                isBind = true;
            } catch (final Exception e) {
                logger.warn("LDAP configuration is wrong.", e);
            }
        }