rpc: attempt to fix ping/pong logic race #27733
Merged
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Outdated suggestions cannot be applied.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.
This could be a fix for the issue reported in #27726. With enough load, it might happen that the
SetPongHandler
callback gets invoked before the call toSetReadDeadline
is made inpingLoop
. When this occurs, the socket will end up with a 30s read deadline even though it got the pong, which will lead to a timeout.The fix here is processing the pong on
pingLoop
, synchronizing with the code that sends the ping.