访问认证是通过mysql来认证的 但是mysql挂了后进入emqx界面会报错 错误信息：
[{error,{exception,{case_clause,{ok,<<“emqx_authn”>>, #{callback_mode => always_sync, config => #{backend => mysql, database => <<“dfffdb”>>, enable => true, mechanism => password_based, password => <<“xxxxx”>>, password_hash_algorithm => #{name => sha256, salt_position => suffix}, pool_size => 8, prepare_statement => #{emqx_authn_mysql => <<“SELECT password_hash, salt FROM mt_user where user_name = ? LIMIT 1”>>}, query => “SELECT password_hash, salt FROM mt_user where user_name = ${username} LIMIT 1”, query_timeout => 5000, server => “0.0.0.0:31114”, ssl => #{ciphers => ,depth => 10, enable => false, hibernate_after => 5000, reuse_sessions => true, secure_renegotiate => true, user_lookup_fun => {fun emqx_tls_psk:lookup/3, undefined}, verify => verify_peer, versions => [‘tlsv1.3’,‘tlsv1.2’, ‘tlsv1.1’,tlsv1]}, username => <<“root”>>}, id => <<“emqx_authn_mysql:1”>>, mod => emqx_connector_mysql, query_mode => sync, state => #{batch_inserts => #{}, batch_params_tokens => #{}, params_tokens => #{emqx_authn_mysql => }, poolname => ‘emqx_authn_mysql:1:2’, prepare_statement => #{emqx_authn_mysql => <<“SELECT password_hash, salt FROM mt_user where user_name = ? LIMIT 1”>>}}, status => connecting}}}, [{emqx_authn_api,lookup_from_local_node,2, [{file,“emqx_authn_api.erl”}, {line,872}]}]}}]
进入emqx的时候mysql已经已经全部恢复了 但是还是出现这个错误 我客户端连接也无法连接 但是如果重新配置下更新mysql连接后又好了
请问你的 emqx 版本是哪个？可能是已经修复过的问题。