B4J Question Strange behavior on VPS if i make a post request with httpsutils

[Alexander Stolte]

I have the following code:

Dim url As String = $"https://identitytoolkit.googleapis.com/v1/accounts:resetPassword?key=${API_KEY}"$
Dim json As JSONGenerator
json.Initialize(CreateMap("oobCode":oobCode))
Dim j As HttpJob : j.Initialize("",Me)
j.PostString(url,json.ToString)
j.GetRequest.SetContentType("application/json")
    
Wait For (j) JobDone(j As HttpJob)

If i run it local on my pc it works as expected, but if i run it on my VPS then the following error message is returned by Firebase:

ResponseError. Reason: , Response: {
  "error": {
    "code": 400,
    "message": "MISSING_OOB_CODE",
    "errors": [
      {
        "message": "MISSING_OOB_CODE",
        "domain": "global",
        "reason": "invalid"
      }
    ]
  }
}

The crazy thing is, it happens only every 2-4 times, sometimes more than once in a row, but in the logging I see that the data that is transmitted is always the right one.
OS: Ubuntu 20.04 (64 Bit) non-ui
Has anyone ever had these problems on a server?

 

[Erel]

Are you making multiple connections at once? Better to set the relevant handler to be a single thread handler.

 

[Alexander Stolte]

Are you making multiple connections at once?

In live mode yes, but in my test locally and then on the server I am the only one who has only made one request.

Better to set the relevant handler to be a single thread handler.

Let me try it out.

 

[Alexander Stolte]

Better to set the relevant handler to be a single thread handler.

I test it 4 times without any errors.
What disadvantages does the service have now that it is single thread?

 

[Erel]

I'm not sure that it is related to this error. You will need to make more tests.

It means that each connection, to this handler, will be handled sequentially. If the firebase server responds fast enough then it shouldn't be an issue.

 

[Alexander Stolte]

I'm not sure that it is related to this error. You will need to make more tests.

After some tests with several devices, I can say that this was the reason. As soon as I switch the MutliThread Handler again the errors come back.

I execute the code in a different class than the handler and wait for the result, can this be the error?

 

[Erel]

I execute the code in a different class than the handler and wait for the result, can this be the error?

Yes. The class "owner thread" is different so you must take more care when calling back and forth.