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fix(backend): リモートサーバーの情報が更新できなくなっていた問題を修正 (#13507)

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* fix(backend): fetchInstanceMetadataのLockが永遠に解除されない問題を修正

Co-authored-by: まっちゃとーにゅ <17376330+u1-liquid@users.noreply.github.com>

* fix test

* fix

* comment

* comment

* improve test

---------

Co-authored-by: まっちゃとーにゅ <17376330+u1-liquid@users.noreply.github.com>
This commit is contained in:
tamaina 2024-03-04 13:48:57 +09:00 • committed by GitHub
parent 983480131b
commit 9542cb8d62
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2 changed files with 43 additions and 9 deletions
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28
packages/backend/src/core/FetchInstanceMetadataService.ts
View file

@ -51,21 +51,35 @@ export class FetchInstanceMetadataService {
}
@bindThis
public async tryLock(host: string): Promise<boolean> {
const mutex = await this.redisClient.set(`fetchInstanceMetadata:mutex:${host}`, '1', 'GET');
return mutex !== '1';
// public for test
public async tryLock(host: string): Promise<string | null> {
// TODO: マイグレーションなのであとで消す (2024.3.1)
this.redisClient.del(`fetchInstanceMetadata:mutex:${host}`);
return await this.redisClient.set(
`fetchInstanceMetadata:mutex:v2:${host}`, '1',
'EX', 30, // 30秒したら自動でロック解除 https://github.com/misskey-dev/misskey/issues/13506#issuecomment-1975375395
'GET' // 古い値を返す（なかったらnull）
);
}
@bindThis
public unlock(host: string): Promise<'OK'> {
return this.redisClient.set(`fetchInstanceMetadata:mutex:${host}`, '0');
// public for test
public unlock(host: string): Promise<number> {
return this.redisClient.del(`fetchInstanceMetadata:mutex:v2:${host}`);
}
@bindThis
public async fetchInstanceMetadata(instance: MiInstance, force = false): Promise<void> {
const host = instance.host;
// Acquire mutex to ensure no parallel runs
if (!await this.tryLock(host)) return;
// finallyでunlockされてしまうのでtry内でロックチェックをしない
// （returnであってもfinallyは実行される）
if (!force && await this.tryLock(host) === '1') {
// 1が返ってきていたらロックされているという意味なので、何もしない
return;
}
try {
if (!force) {
const _instance = await this.federatedInstanceService.fetch(host);

24
packages/backend/test/unit/FetchInstanceMetadataService.ts
View file

@ -56,6 +56,7 @@ describe('FetchInstanceMetadataService', () => {
} else if (token === DI.redis) {
return mockRedis;
}
return null;
})
.compile();
@ -78,6 +79,7 @@ describe('FetchInstanceMetadataService', () => {
httpRequestService.getJson.mockImplementation(() => { throw Error(); });
const tryLockSpy = jest.spyOn(fetchInstanceMetadataService, 'tryLock');
const unlockSpy = jest.spyOn(fetchInstanceMetadataService, 'unlock');
await fetchInstanceMetadataService.fetchInstanceMetadata({ host: 'example.com' } as any);
expect(tryLockSpy).toHaveBeenCalledTimes(1);
expect(unlockSpy).toHaveBeenCalledTimes(1);
@ -92,6 +94,7 @@ describe('FetchInstanceMetadataService', () => {
httpRequestService.getJson.mockImplementation(() => { throw Error(); });
const tryLockSpy = jest.spyOn(fetchInstanceMetadataService, 'tryLock');
const unlockSpy = jest.spyOn(fetchInstanceMetadataService, 'unlock');
await fetchInstanceMetadataService.fetchInstanceMetadata({ host: 'example.com' } as any);
expect(tryLockSpy).toHaveBeenCalledTimes(1);
expect(unlockSpy).toHaveBeenCalledTimes(1);
@ -104,13 +107,30 @@ describe('FetchInstanceMetadataService', () => {
const now = Date.now();
federatedInstanceService.fetch.mockResolvedValue({ infoUpdatedAt: { getTime: () => now - 10 * 1000 * 60 * 60 * 24 } } as any);
httpRequestService.getJson.mockImplementation(() => { throw Error(); });
await fetchInstanceMetadataService.tryLock('example.com');
const tryLockSpy = jest.spyOn(fetchInstanceMetadataService, 'tryLock');
const unlockSpy = jest.spyOn(fetchInstanceMetadataService, 'unlock');
await fetchInstanceMetadataService.tryLock('example.com');
await fetchInstanceMetadataService.fetchInstanceMetadata({ host: 'example.com' } as any);
expect(tryLockSpy).toHaveBeenCalledTimes(2);
expect(tryLockSpy).toHaveBeenCalledTimes(1);
expect(unlockSpy).toHaveBeenCalledTimes(0);
expect(federatedInstanceService.fetch).toHaveBeenCalledTimes(0);
expect(httpRequestService.getJson).toHaveBeenCalledTimes(0);
});
test('Do when lock not acquired but forced', async () => {
redisClient.set = mockRedis();
const now = Date.now();
federatedInstanceService.fetch.mockResolvedValue({ infoUpdatedAt: { getTime: () => now - 10 * 1000 * 60 * 60 * 24 } } as any);
httpRequestService.getJson.mockImplementation(() => { throw Error(); });
await fetchInstanceMetadataService.tryLock('example.com');
const tryLockSpy = jest.spyOn(fetchInstanceMetadataService, 'tryLock');
const unlockSpy = jest.spyOn(fetchInstanceMetadataService, 'unlock');
await fetchInstanceMetadataService.fetchInstanceMetadata({ host: 'example.com' } as any, true);
expect(tryLockSpy).toHaveBeenCalledTimes(0);
expect(unlockSpy).toHaveBeenCalledTimes(1);
expect(federatedInstanceService.fetch).toHaveBeenCalledTimes(0);
expect(httpRequestService.getJson).toHaveBeenCalled();
});
});