RocketChat / RocketChat/Rocket.Chat

Direct Reply via e-mail are multiplied by the amount of running instances

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Dominant language
TypeScript
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Description

Description:

When using "Direct Reply" via e-mail the recipient gets the same reply X times equal to the amount of running instances.

Steps to reproduce:
  1. Get an e-mail notification that you've been direct messaged
  2. Answer per e-mail
  3. Get the same answer multiple times
Expected behavior:

I expect to get the answer just once

Actual behavior:

Actually I got the same answer three times, equally to the amount of our running instances.

Server Setup Information:
  • Version of Rocket.Chat Server: 3.9.3
  • Operating System: Debian GNU/Linux 9.13 (stretch)
  • Deployment Method: tar
  • Number of Running Instances: 3
  • DB Replicaset Oplog: enabled
  • NodeJS Version: v12.20.0
  • MongoDB Version: 3.6.21
Client Setup Information
  • Desktop App or Browser Version: both
  • Operating System: Windows 10 Pro, Ubuntu [16.04,18.04,20.04]
Additional context
Relevant logs:

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No files, tests, or entry points are named. Begin by reproducing the direct-reply flow with three running instances and trace how one incoming email is handled across them; done means each reply is delivered only once regardless of instance count.

Written by the indexing model from the issue text.

Assessment

Tech stack
node.js, typescript
Domain
backend, distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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