Cronet exception: m.ms: Exception in CronetUrlRequest: net::ERR_CONNECTION_CLOSED, ErrorCode=5

[JSBmanD]

Package

dio

Version

5.4.1

Operating-System

Android

Adapter

NativeAdapter

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! Doctor found issues in 2 categories.

Dart Version

3.3.4

Steps to Reproduce

1. Create long polling client (that will make requests one after another for a period of time)
2. Start making requests

Expected Result

Requests succeed

Actual Result

After some time requests will fail with Cronet exception: m.ms: Exception in CronetUrlRequest: net::ERR_CONNECTION_CLOSED, ErrorCode=5, InternalErrorCode=-100, Retryable=true, uri=https://***/v1/polling.getUpdates?ts=***,statusCode: null,cause: DioException [unknown]: null

Devices distribution (out of 30k events):

Full log

Cronet exception: m.ms: Exception in CronetUrlRequest: net::ERR_CONNECTION_CLOSED, ErrorCode=5, InternalErrorCode=-100, Retryable=true, uri=https://alive.go-rhino.com/v1/polling.getUpdates?ts=1717011232038) | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
pid: 27540, tid: 27615, name 1.ui
os: android arch: arm64 comp: yes sim: no
build_id: 'b866ace18fa006c0f7dae5b7963c0614'
isolate_dso_base: 797e36f000, vm_dso_base: 797e36f000
isolate_instructions: 797e5b5580, vm_instructions: 797e59f000
    #00 abs 000000797ead0d0b virt 0000000000761d0b _kDartIsolateSnapshotInstructions+0x51b78b
    #01 abs 000000797ead0073 virt 0000000000761073 _kDartIsolateSnapshotInstructions+0x51aaf3
    #02 abs 000000797e71adcb virt 00000000003abdcb _kDartIsolateSnapshotInstructions+0x16584b
    #03 abs 000000797eb2fcfb virt 00000000007c0cfb _kDartIsolateSnapshotInstructions+0x57a77b
    #04 abs 000000797eb2fafb virt 00000000007c0afb _kDartIsolateSnapshotInstructions+0x57a57b
<asynchronous suspension>

[AlexV525]

Could you use the standalone cronet_http to verify if the issue can be reproduced? Dio is unlikely related to the issue itself.

[JSBmanD]

@AlexV525 probably it's cronet bug only on samsung, created issue there dart-lang/http#1217
Found this on samsung website https://eu.community.samsung.com/t5/galaxy-s23-series/connection-closed-error-message/td-p/9833994

[vshvedov]

It's the same behaviour on FireOS. @JSBmanD have you found any solution to fix it?

[JSBmanD]

@vshvedov don't use rest clients in background and use NativeAdapter.

[neiljaywarner]

@JSBmanD can you give some details or links on this idea please?

[JSBmanD]

@JSBmanD can you give some details or links on this idea please?

Can't give any links except for empirical experience on ~3k samsung devices. I believe that there's a problem with the dns cache that appears only in the background.