Can simultaneous request override traceId ?

[TbotaPhantA]

If two users will send 2 requests simultaneously:

• first one will set traceId: some-uuid-1,
• second one will set traceId: some-uuid-2,

then:

• first one will log some-uuid-2 (but it should log some-uuid-1, becuase this is first request)
• second one will log proper traceId some-uuid-2

Am I right or Am I wrong?

[techvlad]

No, if this corner case is possible - that's bug in Node.js core, see https://nodejs.org/api/async_context.html#class-asynclocalstorage
nodejs/node#22360

[techvlad]

This library is simple wrapper for AsyncLocalStorage

[TbotaPhantA]

Got it, thank you😊!