stacks-network/stacks-core

Duplicate events broadcasted to same API server

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#2,810 opened on Aug 11, 2021

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Description

Describe the bug When an API server is configured in both a events_observer block in the stacks-node's config TOML, and the STACKS_EVENT_OBSERVER environment variable, stacks-node will broadcast transactions to the target API server twice, causing it to fail over time.

Steps To Reproduce

  1. Start a stacks-blockchain-api server
  2. Export the STACKS_EVENT_OBSERVER env variable pointing to the API server.
  3. Run stacks-node with a config TOML which has a events_observer block pointing to the API server

Expected behavior The stacks-node should detect if there are duplicate event server entries between the events_observer block in the TOML and the STACKS_EVENT_OBSERVER env variable. If duplicate entries are found, print a log message saying so and exit.

Environment (please complete the following information): stacks-node version 2.0.11.2.0

More info can be found here.

Contributor guide

Research direction
Examine the event observer initialization code to understand how duplicates arise and implement deduplication.
Tech stack
rust
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75