Fix infinite loop in discoverer #2020
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
1) It duplicates registration in `version` message handler and no valid connection can work without version exchange. 2) On public networks we have seed nodes defined by names, so we register connections to them using these names, but then if connection is dropped we delist them by IP:PORT combinations which can lead to zero PeerCount() with all seeds still being registered as connected in the discovery subsystem and thus no reconnection attempts being made.
We can have multiple copies of the same address in the pool and we should only proceed to connect once per attempt.
It happens from time to time in a four-node private network where there are seeds (aka CNs) and not a lot of other nodes to connect to. I don't know how to test for an infinite loop that has no side-effects, so no test added here.
AnnaShaleva
approved these changes
Jun 18, 2021
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Problem
Noticed by @532910:
Solution
Backport some fixes from master.