libp2p / libp2p/go-libp2p-pubsub

Messages get lost when using gossipsub

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kind/bug
Dominant language
Go
Stars
364
Forks
221
PR merge metrics
No merged PRs in 30d

Description

Pubsub is supposed to be reliable but I lose messages when using gossipsub. The problem is when I use around 10 nodes and all nodes try to broadcast messages to a topic in the pubsub, not all of the messages get delivered and receiving nodes lose some messages. I also have tried floodsub, but the problem still persists.

Contributor guide

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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

Start by reproducing the reported case with around 10 nodes, where all nodes broadcast to a gossipsub topic. Compare message delivery in the gossipsub and floodsub paths, then determine whether the missing messages can be reproduced consistently. Done means identifying and fixing the delivery loss and confirming that all messages reach the receiving nodes.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
distributed-systems, networking
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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