UnhandledPromiseRejectionWarning: MongoError: w has to be a non-negative number and not greater than 50

[danieldid]

After git cloning / npm i / mongodb installation under Ubuntu 18.04 LTS and changing the webservice -> port in config.js to anything else than 3000, e. g. 5001 leads to following error:

root@didd-dev:/var/www/http/pa11y-dashboard# node index.js 

Pa11y Dashboard started
mode: undefined
uri:  http://:::5000
Server running at: http://0.0.0.0:5001

Pa11y Webservice started
mode:     undefined
uri:      http://0.0.0.0:5001
database: mongodb://localhost/pa11y-webservice
cron:     0 30 0 * * *
(node:23502) UnhandledPromiseRejectionWarning: MongoError: w has to be a non-negative number and not greater than 50
    at Function.MongoError.create (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/error.js:31:11)
    at /var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:497:72
    at authenticateStragglers (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:443:16)
    at Connection.messageHandler (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:477:5)
    at Socket.<anonymous> (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/connection.js:333:22)
    at Socket.emit (events.js:314:20)
    at addChunk (_stream_readable.js:297:12)
    at readableAddChunk (_stream_readable.js:272:9)
    at Socket.Readable.push (_stream_readable.js:213:10)
    at TCP.onStreamRead (internal/stream_base_commons.js:188:23)
(node:23502) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:23502) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:23502) UnhandledPromiseRejectionWarning: MongoError: w has to be a non-negative number and not greater than 50
    at Function.MongoError.create (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/error.js:31:11)
    at /var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:497:72
    at authenticateStragglers (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:443:16)
    at Connection.messageHandler (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/pool.js:477:5)
    at Socket.<anonymous> (/var/www/http/pa11y-dashboard/node_modules/mongodb-core/lib/connection/connection.js:333:22)
    at Socket.emit (events.js:314:20)
    at addChunk (_stream_readable.js:297:12)
    at readableAddChunk (_stream_readable.js:272:9)
    at Socket.Readable.push (_stream_readable.js:213:10)
    at TCP.onStreamRead (internal/stream_base_commons.js:188:23)
(node:23502) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)

When leaving it at 3000 I get the following error:

root@didd-dev:/var/www/http/pa11y-dashboard# node index.js 

Pa11y Dashboard started
mode: undefined
uri:  http://:::5000
Server running at: http://0.0.0.0:3000
Error: listen EADDRINUSE: address already in use 0.0.0.0:3000
    at Server.setupListenHandle [as _listen2] (net.js:1316:16)
    at listenInCluster (net.js:1364:12)
    at doListen (net.js:1501:7)
    at processTicksAndRejections (internal/process/task_queues.js:85:21)

When checking for other applications running on port 3000 I get nothing in return:

root@didd-dev:/var/www/http/pa11y-dashboard# ps aux | grep 3000
root     23619  0.0  0.0  13136  1028 pts/0    S+   09:19   0:00 grep --color=auto 3000

[josebolos]

Hi @danieldid,

Thanks for creating this issue. Would you be able to share the exact config file that you used?

[danieldid]

Hi @josebolos,

excuse me for any inconvenience, I missed the right tab in the browser!
I'm facing the same problems as here pa11y/pa11y-dashboard#271

So I shall close this issue as it's related to pa11y-dashboard not pa11y-webservice