Error `document not attached` occurs when Detach and Sync race

[chacha912]

What happened:

Error document not attached occurs when going backwards in codepair. This error occurs due to a race condition between Detach and Sync requests. Since a sync loop is performed independently of a detach, the client may send a sync request while the document is still considered attached before receiving a response to the detach request. This causes an error on the server because it has already processed the detach request and considers the document detached.

What you expected to happen:

The Detach and Sync requests should not race to avoid the document not attached error.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Operating system:
• Browser and version:
• Yorkie version (use yorkie version):
• Yorkie JS SDK version:

[jeonghye-choi]

I'm interested in this issue. Can I give it a shot?

[blurfx]

Sure :)

[sejongk]

@jeonghye-choi I've unassigned you from this issue to allow others to contribute. If you're still interested in it, please let me know.

[blurfx]

@gwbaik9717 Hi. Are you still working on this issue yourself? If not, we'd like to unassign so that other contributors can work on it.

[gwbaik9717]

Oh sure! Ive been busy working on other stuff.. Feel free to do so :)

[ezcolin2]

I'm interested in this issue, but is it still unresolved? I'm trying to reproduce the problem, but it's not easy. While I was typing in the document to reproduce the push-pull situation in a deactivated state, I hit the back button and noticed that instead of a "document not attached" error, I got a "client not activated" error. If this is an unresolved issue, could you tell me how to reproduce it?