Future already completed

[jargalbat]

When calling requests, the error has been thrown randomly.

Error: Bad state: Future already completed
at Object.throw_ [as throw] (http://localhost:1234/dart_sdk.js:5067:11)
at _AsyncCompleter.new.completeError (http://localhost:1234/dart_sdk.js:35195:51)
at http://localhost:1234/packages/dio/src/interceptors/log.dart.lib.js:651:25
at _RootZone.runUnary (http://localhost:1234/dart_sdk.js:40441:59)
at _FutureListener.then.handleValue (http://localhost:1234/dart_sdk.js:35363:29)
at handleValueCallback (http://localhost:1234/dart_sdk.js:35931:49)
at Function._propagateToListeners (http://localhost:1234/dart_sdk.js:35969:17)
at _Future.new.[_complete] (http://localhost:1234/dart_sdk.js:35809:25)
at http://localhost:1234/dart_sdk.js:34915:30
at internalCallback (http://localhost:1234/dart_sdk.js:26619:11)

_dio.interceptors.add(CustomInterceptors());

// ...

class CustomInterceptors extends Interceptor {
  @override
  void onError(DioError err, ErrorInterceptorHandler handler) async {
    if (err.response != null) {
      if (err.response!.statusCode == 401) {
        // ...
        handler.resolve(response);
      } else {
        handler.next(err);
      }
    }

    return super.onError(err, handler);
  }
}

Issue Info

Info	Value
Platform Name	Chrome
Dio Version	4.0.6
Android Studio Version	2021.1.1 Patch 2

Issue Description and Steps

Tried using flutter config --no-analytics. It didn't work.

[alreadytaken1990]

change version to v4.0.4, same #1452 , wait for solute

[YouchanChung]

same issue..

[Dkrinker]

Same issue

[yairsts]

Same issue...

[ZhZhZhen]

我在web项目中，也会输出这个错误

[marcelomdea]

Same issue...

[mdeandrea-mrmilu]

Related to #1497 and PR #1496

[grinder15]

Same issue.

[loidy]

Still happening in 4.0.6

[angelomedeiros]

Same issue.

[Amr-SymTerra]

Same issue

[vrsct]

Same issue

[klepon]

same issue

[TryImpossible]

same issue

[hamzakhurshid12]

Same issue

[kenNg1]

Same issue

[tranducthang1505]

Same issue

[nicolaspernoud]

Same issue

[SumanPoudel0699]

https://stackoverflow.com/a/73824643/19475845

I have written one solution in StackOverflow this helps me to get rid of Error: Bad state: Future already completed error may help you also

[ikallali]

+1

[CrazyboyQCD]

+1

[davidmigloz]

Similar issues:

• flutter web console show Bad state: Future already completed #1454
• "Future already completed" error in web #1497
• [web] Frequent Bad state: Future already completed #1536

Open PRs:

• Browser adapter time out #1470
• Fix for "Future already completed" error in web #1496
• fix(web): fix 'Future already completed' error when connectTimeout was set. #1550
• 解决 WEB 端BUG #1565

[Wbqqqq]

+1

[HasanAlqaisi]

+1

[ajikmat]

+1

[metafounder]

+1

[adbelemvy]

same issue here

[botaditya]

Same issue being faced by me

[marjandn]

I have this issue as well

[mdeandrea-mrmilu]

@AlexV525 why this issue is closed? Someone fix this bug?

[AlexV525]

Yes, in #1550.

[MajedDH]

I had the same issue.

I really spent hours to figure out that the handler should be called once. my code was wrongly calling handler.resolve and then handler.next.

I corrected the code to call only one of them (if else) , it worked like a charm.

[devnta]

For anyone come late
I just removed super.onError(err, handler); on onError method.

[kuhnroyal]

#2130 improves the error message for this case.