bench script start error

[zhaoguohao21]

./emqtt_bench conn -h 127.0.0.1 -p 1883 -V 3 -c 10 -i 10 --log_to console

i started emqx broker ,and use mqtt.fx to test, it runs well . but when i run bench script

output is :

Start with 10 workers, addrs pool size: 1 and req interval: 100 ms

=ERROR REPORT==== 13-Oct-2023::12:03:12.196746 ===
error: 'EXIT'
reason: einval
msg: connection_error
clietntid: <<"GUOHAOZHAO-MB1_bench_conn_2351988102_1">>
client(8): connect error - {{shutdown,einval},{'EXIT',#Port<0.23>,einval}}
client(1): connect error - {{shutdown,einval},{'EXIT',#Port<0.19>,einval}}
client(3): connect error - {{shutdown,einval},{'EXIT',#Port<0.22>,einval}}
client(6): connect error - {{shutdown,einval},{'EXIT',#Port<0.17>,einval}}
client(9): connect error - {{shutdown,einval},{'EXIT',#Port<0.16>,einval}}
client(2): connect error - {{shutdown,einval},{'EXIT',#Port<0.21>,einval}}
client(4): connect error - {{shutdown,einval},{'EXIT',#Port<0.20>,einval}}
client(10): connect error - {{shutdown,einval},{'EXIT',#Port<0.14>,einval}}
client(7): connect error - {{shutdown,einval},{'EXIT',#Port<0.18>,einval}}
client(5): connect error - {{shutdown,einval},{'EXIT',#Port<0.15>,einval}}

[id]

@zhaoguohao21 could you add more details?

• please confirm that you started emqx on the same machine
• which OS is on your machine
• what is emqx version and how do you run it
• how did you install emqtt-bench, and if you built it from source - what is your Erlang/OTP version