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"TypeError: Cannot convert undefined or null to object" at Socket.IO testing

See original GitHub issue

The following error occurred in the case of Socket.IO testing with response timeout. Summary report could not be displayed.

/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/lib/console-reporter.js:167
    const coreRates = Object.keys(report.rates).filter(name => name.startsWith('core.'));
                             ^

TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at ConsoleReporter.printReport (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/lib/console-reporter.js:167:30)
    at ConsoleReporter.stats (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/lib/console-reporter.js:91:8)
    at EventEmitter.emit (/Users/hiroaki-hotta/.config/yarn/global/node_modules/eventemitter3/index.js:202:33)
    at EventEmitter.<anonymous> (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/lib/runner-sp.js:62:19)
    at EventEmitter.emit (/Users/hiroaki-hotta/.config/yarn/global/node_modules/eventemitter3/index.js:202:33)
    at SSMS.<anonymous> (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/core/lib/runner.js:332:8)
    at SSMS.emit (events.js:314:20)
    at SSMS._maybeEmitMostRecentPeriod (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/core/lib/ssms.js:480:12)
    at SSMS.aggregate (/Users/hiroaki-hotta/.config/yarn/global/node_modules/artillery/core/lib/ssms.js:474:10)

OS: macOS Catalina 10.15.7 Version: artillery/2.0.0-dev2 darwin-x64 node-v12.21.0 (globally installed)

Issue Analytics

State:
Created 2 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

dav1appcommented, May 18, 2021

I’m using the 2.0.0-dev2 version. I’m using the WebSockets implementation, not the Socket.IO.

This doesn’t break:

{
    "config": {
        "target": "ws://localhost:4001/",
        "phases": [
            {
                "duration": 20,
                "arrivalRate": 1,
            }
        ],
        "ws": {
            "subprotocols": [
                "json",
                "soap"
            ]
        }
    },
    "scenarios": [
        {
            "name": "Echo a string",
            "engine": "ws",
            "flow": [
                {
                    "send": "hello"
                },
                {
                    "think": 20
                },
                {
                    "send": "how are you?"
                }
            ]
        }
    ]
}

But add "maxVusers": 1 to phases, it breaks.

{
    "config": {
        "target": "ws://localhost:4001/",
        "phases": [
            {
                "duration": 20,
                "arrivalRate": 1,
                "maxVusers": 1
            }
        ],
        "ws": {
            "subprotocols": [
                "json",
                "soap"
            ]
        }
    },
    "scenarios": [
        {
            "name": "Echo a string",
            "engine": "ws",
            "flow": [
                {
                    "send": "hello"
                },
                {
                    "think": 20
                },
                {
                    "send": "how are you?"
                }
            ]
        }
    ]
}

0reactions

hassycommented, Apr 16, 2021

Thanks again @h6ak! This has been fixed now (on master branch).

Note that current Socket.io engine uses v2 of the Socket.io protocol so it will not work properly with newer servers unless allowEIO3 option is set on the server: https://socket.io/blog/socket-io-3-1-0/

(Just created #992 to track the upgrade on Artillery’s side)

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