mzbench not connecting to the host specify in the scenario

[shaloba]

Hi,

I have cloned this repository in order to stress test my VerneMQ broker. I use the following scenario that uses the mqtt_worker from https://github.com/erlio/vmq_mzbench

#!benchDL

#######
# Scenario:
# A single subscriber reading from "prefix/clients/#" topic filter
# 1k publisher publishing to exclusive topic "prefix/clients/{client_id}"
# Overall msg rate: 1k msg/s
# Message size: 150 random bytes
# Running time: 5 min
#######

make_install(git = "https://github.com/shaloba/vmq_mzbench.git",
             branch = "master")

pool(size = 1,
     worker_type = mqtt_worker):

            connect([t(host, "<my-domain>"),
                    t(port,1883),
                    t(client,"subscriber1"),
                    t(clean_session,false),
                    t(keepalive_interval,60),
                    t(proto_version,4), t(reconnect_timeout,4)
                    ])

            wait(1 sec)
            subscribe("prefix/clients/#", 0)

when i run the scenario above I noticed that its not connecting to the host i'm specifying, I know that its not related to your repo but i'm breaking my brain to figure out this one, I will appreciate any help!

Thanks in advanced! :)

Shlomy.

[parsifal-47]

Hi, how did you noticed that it is not connecting? Did you try checking logs?

could you please attach log file except for sensitive parts, it would be helpful for diagnostics

[shaloba]

Hi, thanks for the reply. yes I used also python client to connect the broker and verify it running and everything was Ok. One more weird thing is that on one of the tests i set the port to 18883 (no service is listening to this one) and still the same result the test ran without failing

this is when using the real port 1883:

log.txt

this one is when I used the fake 18883:

log2.txt

[parsifal-47]

Sorry for late reply, interesting thing is that you have total number of connections (reported by mqtt worker) negative:

"mqtt.connection.current_total",counter,{-1000,

it is probably aware of the problem, the log you provided is "system log", do you have anything in "user log"?

[kksudo]

@parsifal-47 Hello! I run mqtt_worker test with ssl/tls. I have same problem, {"mqtt.connection.current_total",counter,{-113,, as bellow

Can you help me to solve the trouble ?

Scenario

#!benchDL

make_install(git = "https://github.com/erlio/vmq_mzbench.git",
             branch = "master")

pool(size = 3,
     worker_type = mqtt_worker,
     worker_start = linear(1 rps)):
            connect([t(host,"my-domain.com"),
                    t(port,8883),
                    t(username,"cred-dev"),
                    t(password, "cred-dev"),
                    t(client,fixed_client_id("mzbench-publisher", worker_id())),
                    t(clean_session,false),
                    t(keepalive_interval,60),
                    t(proto_version,4),
                    t(reconnect_timeout,2)
                    ])

            wait(10 sec)
            set_signal("connect1",1)
            wait_signal("connect1", 3)
            wait(5 sec)
            loop(time = 1 min, rate = 10 rpm):
                publish_to_self("load/test/", random_binary(150), 0)
            disconnect()

Dockerfile System logs User logs

[parsifal-47]

Hi Kirill, my recommendation will be to try MZBench which supports latest OTP version, https://github.com/mzbench/mzbench there could be some problems caused by version incompatibility

[kksudo]

Thank you for quick reply, i will check.