Chat-integration plugin "Error: unable to fetch users from Slack" when running /post in large (17,000+) slack instance

CaseyG · October 11, 2023, 12:11pm

I’m also getting this error! No success in a private or public channel, both of which have the bot added.

Did you ever figure this out?

For what it’s worth, my Slack instance has 17,000+ users, so I am wondering if something is going wrong with the users.list endpoint? I am able to successfully return a very long users.list response via Slack’s API tester, using the same token provided in Discours settings. users.list method | Slack

One theory on what might be going wrong: it looks like Discourse is paginating 200 users at a time, which would require 85+ API calls.

Users.list is a Tier 2 rate limited endpoint:

Web API Tier 2
20+ per minute
Most methods allow at least 20 requests per minute, while allowing for occasional bursts of more requests.

Is it possible that this is a rate limit issue?

github.com

discourse/discourse-chat-integration/blob/4f9ccb58cae8600dcb6db84f38f235283911e6e8/lib/discourse_chat_integration/provider/slack/slack_transcript.rb#L277


      
          http = ::DiscourseChatIntegration::Provider::SlackProvider.slack_api_http
          
          cursor = nil
          req = Net::HTTP::Post.new(URI("https://slack.com/api/users.list"))
          
          users = {}
          loop do
            break if cursor == ""
            req.set_form_data(
              token: SiteSetting.chat_integration_slack_access_token,
              limit: 200,
              cursor: cursor,
            )
            response = http.request(req)
            raise UserFetchError.new unless response.kind_of? Net::HTTPSuccess
            json = JSON.parse(response.body)
            raise UserFetchError.new unless json["ok"]
            cursor = json["response_metadata"]["next_cursor"]
            json["members"].each do |user|
              # Slack uses display_name and falls back to real_name if it is not set
              if user["profile"]["display_name"].blank?

I also can’t seem to access any more detailed log info on this, on my discourse hosted instance. But happy to help debug if useful!

JammyDodger · October 11, 2023, 12:59pm

Are you hosted with us? If so, you can contact us directly for support if you need us to look into more detailed logs.

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Chat-integration plugin "Error: unable to fetch users from Slack" when running /post in large (17,000+) slack instance

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