Question 39202 in Ubuntu Question posted in
The official Ubuntu documentation can be found here.

Resolving Flutter HTTP Host Availability – Ubuntu

I recently migrated to Linux Ubuntu 22.04. I installed Flutter and Android Studio successfully, but when I try to run a project, it throws an exception error.

Exception in thread "main" java.net.SocketExpection: Connection reset

When I also run flutter doctor, the HTTP Host Availability is flagged. Below is my flutter doctor log.

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel main, 3.4.0-19.0.pre.295, on Ubuntu 22.04.1 LTS 5.15.0-47-generic, locale en_US.UTF-8)
Checking Android licenses is taking an unexpectedly long time...
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 2021.2)
[✓] VS Code
[✓] Connected device (3 available)
HTTP Host availability check is taking a long time...
[☠] HTTP Host Availability (the doctor check crashed)
    ✗ Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know about this issue at
      https://github.com/flutter/flutter/issues.
    ✗ Exception: HTTP Host Availability exceeded maximum allowed duration of 0:04:30.000000

! Doctor found issues in 1 category.

P.S.
At the moment I was running flutter doctor, I was connected to the internet.

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2

Answers


  1. 0

    Try Running
    flutter pub get

    I was facing the same issue. It was resolved when I did this

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  2. 0

    Open ${FLUTTER Folder}packagesflutter_toolslibsrchttp_host_validator.dart

    Change https://maven.google.com/ to https://dl.google.com/dl/android/maven2/

    Close Terminal

    Open ${FLUTTER_HOME}bin and delete cache directory

    Reopen Terminal and exec flutter doctor

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