recv_proxy_header,'The PROXY protocol header signature was not recognized.

[18434831316]

2023-04-05T09:24:06.998634+00:00 [error] crasher: initial call: cowboy_clear:connection_process/4, pid: <0.3577.9>, registered_name: [], exit: {{recv_proxy_header,'The PROXY protocol header signature was not recognized. (PP 2.1, PP 2.2)'},[{cowboy_clear,connection_process,4,[{file,"cowboy_clear.erl"},{line,41}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,226}]}]}, ancestors: [<0.2447.0>,<0.2446.0>,ranch_sup,<0.1974.0>], message_queue_len: 1, messages: [{handshake,'ws:default',ranch_tcp,#Port<0.83953>,15000}], links: [<0.2447.0>,#Port<0.83953>], dictionary: [], trap_exit: false, status: running, heap_size: 610, stack_size: 29, reductions: 237; neighbours:
2023-04-05T09:24:06.998846+00:00 [error] Ranch listener 'ws:default' had connection process started with cowboy_clear:start_link/4 at <0.3577.9> exit with reason: {recv_proxy_header,'The PROXY protocol header signature was not recognized. (PP 2.1, PP 2.2)'}

[Rory-Z]

@HJianBo could you please take a look

[HJianBo]

Could you paste your EMQX version, configurations of ws:default listener and your Loadbalancer configs?

It is most likely that the configuration of the EMQX listener is not matching with the configuration of the preceding load balancer, resulting in the issue.