@firebase/firestore: Firestore (10.5.0): FIRESTORE (10.5.0) INTERNAL ASSERTION FAILED: Unexpected state

[brianmhunt]

[REQUIRED] Environment info

firebase-tools: 12.7.0

Platform:. Codespace/Ubuntu.

[REQUIRED] Test case

Unable to reproduce, sorry. Error emits from mutation:624 in serverTransformResults, specifically:

hardAssert(
    fieldTransforms.length === serverTransformResults.length,
    `server transform result count (${serverTransformResults.length}) ` +
      `should match field transform count (${fieldTransforms.length})`
  );

The stack trace does not show where this occurs.

[REQUIRED] Steps to reproduce

In our app when using the emulator this is occurring infrequently but regularly. It is a complex and we cannot easily narrow the trigger point.

It did not occur with 9.x.

[REQUIRED] Expected behavior

Firestore actions should perform

[REQUIRED] Actual behavior

Noted error.

Related: firebase/firebase-tools#1073

All we seem to see in the firestore-debug.log is:

Oct 19, 2023 5:11:27 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Oct 19, 2023 5:12:13 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Oct 19, 2023 5:12:28 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Oct 19, 2023 5:13:13 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.
Oct 19, 2023 5:13:28 PM io.gapi.emulators.netty.HttpVersionRoutingHandler channelRead
INFO: Detected non-HTTP/2 connection.

I appreciate this may be difficult to reproduce but I wanted to at least note it for visibility and discovery. If we get more info we will share.

Thank you!

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[tom-andersen]

Could you enable debug logging?
https://firebase.google.com/docs/reference/js/firestore_#setloglevel
https://firebase.google.com/docs/reference/node/firebase.firestore#setloglevel

The code seems to indicate that the Emulator is returning an unexpected result. Meaning, the root cause might exist in the emulator, and not the SDK. Some more information will help clarify that.

What version of the emulator are you using?

Some context might also be helpful. The error is related to data that is being written to Firestore. What type of write operations are you performing? Are these update, set or delete operations?

[brianmhunt]

Thanks @tom-andersen, some direction would be helpful

We enabled setLogLevel from firebase/app but it does nothing. We're using firebase/app/compat everywhere else and there doesn't seem to be a setLogLevel equivalent for compat. Is there?

Also: how can we tell what version of the emulator we are using?

[brianmhunt]

I would also note that we routinely see a case where doc.get fails:

await firestore.doc(fkp).get()

... simply never finishes. Reloading the browser is the only way to fix it, but it routinely comes back, and this is a catastrophic problem for a single page app.

[brianmhunt]

Linking related firebase-tools/6432.

Also: we can reproduce and fixed this. It was related to a doc.get() being called for the same document many times in succession from different parts of our codebase.

We would expect that Firestore would queue these requests. We resolved it by adding a singleton/cache for the request.

[tom-andersen]

The bug was introduced in 10.4.0. We are reverting the change and working on a long term fix.

I would also note that we routinely see a case where doc.get fails:

await firestore.doc(fkp).get()

... simply never finishes. Reloading the browser is the only way to fix it, but it routinely comes back, and this is a catastrophic problem for a single page app.

[tom-andersen]

Sorry, seeing the current version isn't trivial.

Also: how can we tell what version of the emulator we are using?

What I really want to make sure is that you are running an up to date emulator.

If starting emulator with gcloud CLI, you can run:

gcloud components update

If starting emulator with firebase CLI, you can run:

firebase setup:emulators:firestore