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fix: 🐛 race condition between workers when creating note

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Closes #10345
Discovered here: https://codeberg.org/calckey/calckey/issues/10345#issuecomment-950475
This commit is contained in:
ThatOneCalculator 2023-06-23 17:27:25 -07:00
parent 7640f4d3f8
commit c0f6a53223
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GPG key ID: 8703CACD01000000
1 changed files with 34 additions and 20 deletions
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44
packages/backend/src/services/note/create.ts
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@ -465,26 +465,40 @@ export default async (
if (!note.uri) { if (!note.uri) {
// Publish if the post is local // Publish if the post is local
publishNotesStream(note); publishNotesStream(note);
} else if ( } else if (boostedByRelay && data.renote?.uri) {
boostedByRelay && // Use Redis transaction for atomicity
data.renote?.uri && await redisClient.watch(`publishedNote:${data.renote.uri}`);
(await redisClient.exists(`publishedNote:${data.renote.uri}`)) === 0 const exists = await redisClient.exists(
) { `publishedNote:${data.renote.uri}`,
// Publish if the post was boosted by a relay and not yet published. );
if (exists === 0) {
// Start the transaction
redisClient.multi();
publishNotesStream(data.renote); publishNotesStream(data.renote);
const key = `publishedNote:${data.renote.uri}`; const key = `publishedNote:${data.renote.uri}`;
await redisClient.set(key, 1, "EX", 30); await redisClient.set(key, 1, "EX", 30);
} else if ( // Execute the transaction
!boostedByRelay && redisClient.exec();
note.uri && } else {
(await redisClient.exists(`publishedNote:${note.uri}`)) === 0 // Abort the transaction
) { redisClient.unwatch();
// Publish if the post came directly from a remote server, or from a }
// relay that doesn't boost the post (e.g, YUKIMOCHI Activity-Relay), } else if (!boostedByRelay && note.uri) {
// and not yet published. // Use Redis transaction for atomicity
const key = `publishedNote:${note.uri}`; await redisClient.watch(`publishedNote:${note.uri}`);
const exists = await redisClient.exists(`publishedNote:${note.uri}`);
if (exists === 0) {
// Start the transaction
redisClient.multi();
publishNotesStream(note); publishNotesStream(note);
const key = `publishedNote:${note.uri}`;
await redisClient.set(key, 1, "EX", 30); await redisClient.set(key, 1, "EX", 30);
// Execute the transaction
redisClient.exec();
} else {
// Abort the transaction
redisClient.unwatch();
}
} }
} }
if (note.replyId != null) { if (note.replyId != null) {