connection congested，连接堵塞，是什么原因？

EMQX
1

connection congested: #{buffer => 4096,clientid => <<“BACK-END-SERVICE_TC-IAD_06L868”>>,conn_state => connected,connected_at => 1734418154658,high_msgq_watermark => 8192,high_watermark => 1048576,memory => 197256,message_queue_len => 0,peername => <<“172.24.208.145:40690”>>,pid => <<“<0.13538.7>”>>,proto_name => <<“MQTT”>>,proto_ver => 4,recbuf => 131072,recv_cnt => 3,recv_oct => 96,reductions => 3163964,send_cnt => 5402,send_oct => 670624,send_pend => 201,sndbuf => 226304,sockname => <<“172.17.0.2:1883”>>,socktype => tcp,username => <<“admin”>>}

2

只用一种原因：连接频繁断开重接。