**Problem:** 
Some AD users can't log in, they get the error:
`Authentification failed: password is incorrect or there is no user with such name`

Clickhouse version 22.3.2.1

**There is an error in Clickhouse logs:**
`<Error> Access(user directories): from: 10.11.12.13, user: AD_USERNAME: Authentification failed: Code: 532. DB::Exception: Size limit exceeded. (LDAP_ERROR)`

This error occurs for AD users who have many groups in the **memberOf** LDAP container.

**I checked the number of groups for 4 accounts:**

AD_USERNAME_1 - 107 groups - ERROR Authentification failed
AD_USERNAME_2 - 120 groups - ERROR Authentification failed
AD_USERNAME_3 - 54   groups - OK
AD_USERNAME_4 - 38   groups - OK

**I checked the search groups through the Ldapsearch program:**

Ldapsearch gave all 107 groups for the account without errors:
`ldapsearch -H "ldaps://hostname:636" -D 'CN=AD_USERNAME_1,OU=Users,DC=company,DC=corp.DC=net' -b 'DC=company,DC=corp.DC=net' '(&(objectClass=group)(member=CN=AD_USERNAME_1,OU=Groups,DC=company,DC=corp.DC=net))'`

**Probable cause of the error:** 
Clickhouse receives a list of groups which mapping from AD and cannot process a large string/array.
}
        
        if (params_hash != new_params_hash)
            return false;
        auto & entry = ldap_caches[server][credentials.getUserName()];
        if (entry.last_successful_authentication_timestamp < current_check_timestamp)
        {
            entry.last_successful_params_hash = params_hash;
            entry.last_successful_authentication_timestamp = current_check_timestamp;
            if (role_search_results)
                entry.last_successful_role_search_results = *role_search_results;
            else
                entry.last_successful_role_search_results.clear();
        }
        else if (
            entry.last_successful_params_hash != params_hash ||
            (
                role_search_params == nullptr ?
                !entry.last_successful_role_search_results.empty() :
                role_search_params->size() != entry.last_successful_role_search_results.size()
            )
        )
        {
            
            return false;
        }
    }
    return result;
}
bool ExternalAuthenticators::checkKerberosCredentials(const String & realm, const GSSAcceptorContext & credentials) const