@thisismissem@hachyderm.io we’ve tracked the bug down to one or more problems stemming from having a link in a post to an https: URL that fails to resolve or times out, in the context of an @-mention.
Bridgy Fed is attempting to fetch it and times out. When a #fediverse instance fetches the AS2 version of a post, and Bridgy Fed attempts to fetch that post’s links to construct the AS2 for the post, Bridgy Fed times out, which then likely times out the original AS2 request, so #Mastodon instances never get the requested AS2 post.
There are multiple possible problems:
* content authoring errors (including bad links, links going bad)
* Bridgy Fed attempting to retrieve every link in a post in order to construct the AS2 for a post, possibly with too long timeouts, so the overall AS2 construction takes too long
* Mastodon timing out when requesting the AS2 for a post, then giving up and never trying again (e.g. even when it receives an UPDATE for the post)
More discussion here:
* https://chat.indieweb.org/dev/2024-09-04#t1725421768496000
More details here:
* https://github.com/snarfed/bridgy-fed/issues/884#issuecomment-2327861883
#BridgyFed #atMention #ActivityStreams2