Make find_actor() delete stale sockaddr entries from registrar on OSError
#366
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
Since stale addrs can be leaked where the actor transport server task crashes but doesn't (successfully) unregister from the registrar, we need a remote way to remove such entries; hence this new (registrar) method. To implement this make use of the `bidict` lib for the `._registry` table thus making it super simple to do reverse uuid lookups from an input socket-address.
In cases where an actor's transport server task (by default handling new TCP connections) terminates early but does not de-register from the pertaining registry (aka the registrar) actor's address table, the trying-to-connect client actor will get a connection error on that address. In the case where client handles a (local) `OSError` (meaning the target actor address is likely being contacted over `localhost`) exception, make a further call to the registrar to delete the stale entry and `yield None` gracefully indicating to calling code that no `Portal` can be delivered to the target address. This issue was originally discovered in `piker` where the `emsd` (clearing engine) actor would sometimes crash on rapid client re-connects and then leave a `pikerd` stale entry. With this fix new clients will attempt connect via an endpoint which will re-spawn the `emsd` when a `None` portal is delivered (via `maybe_spawn_em()`).
goodboy
changed the title
find_actor() delete stale sockaddr entries from registar actor on OSErrorfind_actor() delete stale sockaddr entries from registrar on OSError
|
Lul gotta add the |
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Outdated suggestions cannot be applied.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.
All in the title 馃槑