Incorrect integrity when fetching from the cache

Question

When running yarn add --dev jest, I got error Incorrect integrity when fetching from the cache.

Full output:

tests (master)$ yarn add --dev jest
yarn add v1.19.0
info No lockfile found.
[1/4] Resolving packages...
warning jest > jest-cli > jest-config > jest-environment-jsdom > jsdom > left-pad@1.3.0: use String.prototype.padStart()
[2/4] Fetching packages...
error Incorrect integrity when fetching from the cache
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

I tried removed node_modules, re-ran yarn install and yarn add --dev jest to no avail.

How do I fix this?

score 127 · Accepted Answer · answered Sep 30 '19 at 17:36

127

`yarn cache clean`

To fix this, run:

yarn cache clean
yarn add --dev jest

From the yarn cache documentation:

yarn cache clean [<module_name...>]

Running this command will clear the global cache. It will be populated again the next time yarn or yarn install is run. Additionally, you can specify one or more packages that you want to clean.

You can also see where the cache is with yarn cache dir.

yarn cache dir

Running yarn cache dir will print out the path where yarn’s global cache is currently stored.

answered Sep 30 '19 at 17:36

Doug Richardson

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For global packages there is no equivalent to `yarn cache clean`. Manually removing `~/.cache/yarn` solved the 'incorrect integrity' error for me. – imolit Oct 04 '19 at 09:15
3

`yarn cache` commands are all about **global** cache. @imolit – Devs love ZenUML Oct 09 '19 at 10:33

Jogi · Answer 2 · 2019-10-03T11:14:25.023

5

Yarn cache clean did not help. We must downgrading yarn version on the server.

It turns out that the problem is associated with the use of private packages.

GitHub Yarnpkg - "Incorrect integrity when fetching from the cache" #7584

edited Oct 03 '19 at 11:14

answered Oct 03 '19 at 09:06

Jogi

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Specifically these instructions worked for me: https://github.com/yarnpkg/yarn/issues/7584#issuecomment-536437423 – Mike Lyons Dec 02 '19 at 05:06

score 4 · Answer 3 · answered Oct 04 '19 at 08:17

4

For anyone who is working with heroku and sees this error:

install heroku cli
login via heroku login
heroku plugins:install heroku-repo
heroku repo:purge_cache -a $YOURAPPNAME

then do a manual rebuild

answered Oct 04 '19 at 08:17

velop

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score 2 · Answer 4 · answered Mar 03 '20 at 14:42

2

Clean the cache and reinstall:

yarn cache clean
yarn install -f

answered Mar 03 '20 at 14:42

Anayo Oleru

468
5
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score 1 · Answer 5 · answered Mar 25 '20 at 15:02

1

You need to run these two commands before installing the package:

yarn config set unsafe-disable-integrity-migration false
yarn cache clean

answered Mar 25 '20 at 15:02

gildniy

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score 0 · Answer 6 · answered Feb 20 '20 at 03:18

0

Tried to upgrade yarn and it solved my problem. It may be due to the compatibility issue

yarn policies set-version

Will download the latest stable release

Reference : yarn docs https://yarnpkg.com/lang/en/docs/cli/policies/#toc-policies-set-version

answered Feb 20 '20 at 03:18

Karan sharma

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Incorrect integrity when fetching from the cache

Full output:

6 Answers6

`yarn cache clean`

`yarn cache clean [<module_name...>]`

`yarn cache dir`

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