Lesson 6: Error HH502: Couldn't download compiler version list. Please check your internet connection and try again

[J0SAL]

After Doing yarn hardhat, I choose >Create a JavaScript project
But when I try to run yarn hardhat compile it gives the following error.

$ /mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/.bin/hardhat compile
Downloading compiler 0.8.9
(node:1569) ExperimentalWarning: stream/web is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
Error HH502: Couldn't download compiler version list. Please check your internet connection and try again.

HardhatError: HH502: Couldn't download compiler version list. Please check your internet connection and try again.  
    at /mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/solidity/compiler/downloader.ts:149:17
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at CompilerDownloader.downloadCompiler (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/solidity/compiler/downloader.ts:142:5)
    at SimpleTaskDefinition.action (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/builtin-tasks/compile.ts:551:9)
    at Environment._runTaskDefinition (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at SimpleTaskDefinition.action (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/builtin-tasks/compile.ts:678:36)
    at Environment._runTaskDefinition (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at Environment._runTaskDefinition (/mnt/a/projects/Ethereum/hh-fcc/hardhat-simple-storage/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)

    Caused by: Error: getaddrinfo EAI_AGAIN binaries.soliditylang.org
        at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:71:26)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I'm running the code on windows using WSL using

node v16.13.2
yarn v1.22.15
hardhat 2.11.2

[RoboCrypter]

@J0SAL : Change your compiler version to 0.8.7 in all of your contracts as well in your hardhat.config.js file!

Then run : yarn hardhat compile

Let me know, If it resolves your issue!

[RoboCrypter]

@J0SAL : Its looking fine!

[J0SAL]

I tried running the same on windows command prompt and magically it worked!
I guess there is something wrong with my WSL installation

[J0SAL]

Is it fine if I keep usingwindows cmdin the future?
Or should I try resolving the WSL issue?

[RoboCrypter]

@J0SAL :

In your WSL try to compile using ( npm package ) Run this command : npx hardhat compile

Otherwise, try it on Windows Powershell, If it is working there, You can use it!

[J0SAL]

WSL didn't work
But it's working fine on Windows Powershell. I guess I'll go with it.

Thank You!

[alymurtazamemon]

@J0SAL It is an internet issue, you are compiling the first time which is why hardhat is downloading the mentioned compiler version. You should try again when you have stable internet connection.

[J0SAL]

I have already checked my connection speed, and I am 100% sure that my Internet is working fine