diff --git a/packages/backend/src/misc/cache.ts b/packages/backend/src/misc/cache.ts index d968069ca355..f9692ce5d5f3 100644 --- a/packages/backend/src/misc/cache.ts +++ b/packages/backend/src/misc/cache.ts @@ -72,6 +72,10 @@ export class RedisKVCache { /** * キャッシュがあればそれを返し、無ければfetcherを呼び出して結果をキャッシュ&返します + * This awaits the call to Redis to ensure that the write succeeded, which is important for a few reasons: + * * Other code uses this to synchronize changes between worker processes. A failed write can internally de-sync the cluster. + * * Without an `await`, consecutive calls could race. An unlucky race could result in the older write overwriting the newer value. + * * Not awaiting here makes the entire cache non-consistent. The prevents many possible uses. */ @bindThis public async fetch(key: string): Promise { @@ -172,6 +176,10 @@ export class RedisSingleCache { /** * キャッシュがあればそれを返し、無ければfetcherを呼び出して結果をキャッシュ&返します + * This awaits the call to Redis to ensure that the write succeeded, which is important for a few reasons: + * * Other code uses this to synchronize changes between worker processes. A failed write can internally de-sync the cluster. + * * Without an `await`, consecutive calls could race. An unlucky race could result in the older write overwriting the newer value. + * * Not awaiting here makes the entire cache non-consistent. The prevents many possible uses. */ @bindThis public async fetch(): Promise {