2.6 RTM Client will drop messages if they come in rapid succession

[pbrackin]

Description

I am running both the WebClient and the RTMClient within a Django 2.2 framework. The WebClient has always worked great for us, but we need the RTM client in certain environments due to firewall issues. Django 2.2 is not really async friendly, so we need to run with run_async=False for now.

With the 2.5 client, I got it to work for the most part, but I would occasionally see the concurrent.futures._base.TimeoutError. Seeing the updates to 2.6, I decided to give it a go.

It works good as long as the messages don't arrive too fast. Anything on the order of like 2 msgs/sec though and the second message is a no-show.

For now I've reverted to the 2.5 client.

Not being totally sure what the expected functionality is, I opened this as a "question". But if y'all feel it's bug-worthy, feel free to set accordingly.

What type of issue is this? (place an x in one of the [ ])

• [] bug
• enhancement (feature request)
• question
• documentation related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

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Bug Report

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Reproducible in:

slackclient version: 2.6.0
python version: 3.6.9
OS version(s): MacOS, Ubuntu 16.04

Steps to reproduce:

1. install new slack_client 2.6.0,
2. Use RTM Client with run_async=False
3. Not sure it matters, but I am running the client in a separate thread.
4. send 2 messages in rapid succession

Expected result:

both messages arrive in fcn decorated by '@RTMClient.run_on(event="message")'

Actual result:

Only first message arrives.

Attachments:

[seratch]

I will be releasing v2.6.1 very soon. The version no longer has this issue. Thanks for reporting this 🙇

[seratch]

v2.6.1 is out. Could you try it out when you have a chance?
https://pypi.org/project/slackclient/2.6.1/

Thanks again for taking the time to report this issue.

[pbrackin]

That seems to have addressed this issue. Impressive turnaround time - thank you!