Comments (27)
@soluchok Apologies, we're still working on a fix for this! I was on vacation, so I'll hopefully get one in soon and update this ticket accordingly.
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Looks like the wrong REF only happened when we try to re-run a failed workflow.
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@iheanyi thread: https://twitter.com/Runspired/status/1191746539372212224
Roughly I believe the root of the issue is a race condition between when @actions/checkout triggers the checkout and when the merge commit has been created in the repo.
If the checkout occurs before the commit is created, then checkout results in creating the merge commit itself which results in a different SHA than the SHA that is used for $GITHUB_SHA
For some reason this condition is far more common when it is a new commit to an open PR.
I suspect roughly the flow behind the scenes is (in order of A -> G)
success
- A workflow triggered
- B create merge commit
- C populate GITHUB_SHA
- D push merge commit and branch to repository
- F repository receives new merge commit
- E begin workflow
- G checkout PR branch on repository
failure
- A workflow triggered
- B create merge commit
- C populate GITHUB_SHA
- D push merge commit and branch to repository
- G repository receives new merge commit
- E begin workflow
- F checkout PR branch on repository
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The last comment is from half a year ago so I'd like to update and say this issue is indeed still happening. I can't see why it is closed, because the "145 hidden items - Load more items" button doesn't work, but if it was fix, looks like the fix is incomplete or there are multiple ways to trigger this issue.
from checkout.
Looks like the wrong REF only happened when we try to re-run a failed workflow.
This seems to be it in my case - made a dummy commit and now the workflow is running fine. Using Amplify though.
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Our build is still affected by this issue, and v2 version doesn't seem to do a difference. Similar to what @localheinz commented, we also use fetch-depth: 0
configuration which could be the common denominator with our issues.
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Ran into this issue as I've got the same error in my github action.
For me it was resolved today by running git pull --all
in the action shell script before doing anything else with the git repository.
Reasoning: seems like github creates a shallow-depth git repo by default as the git branch -a
command only listed the master
branch (plus the remotes/origin/master
one) while the repo had at least one other branch.
Only after running git pull --all
as part of the action code did that other branch show up and did my other git commands start to behave as expected.
HTH.
Action YML:
name: learn-github-actions
on: [push]
jobs:
fix-illegal-names:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- run: bash ./fix-bad-names.sh
shell script in repo root:
ls -lr
git config user.email [email protected]
git config user.name Github-Action
git pull --all
# show the branches known to git: allows visual check in 'actions' web page
git branch -a
# create local branch when running the action
git checkout -b clean-marker --track remotes/origin/clean-marker
# `ls -lr` for visual feedback and check to see if checkout command succeeded indeed
ls -lr
# do some work on that branch (anything) -- instead of working on HEAD
echo "replace : colons in filenames"
find . -name '*:*' -print | sed -e 's/\(.*\)/mv "\1" @@ "\1"/' -e 's/@@ \(.*\):\(.*\)/\1_\2/g' > rn_us.sh
chmod a+x rn_us.sh
cat rn_us.sh
./rn_us.sh
ls -lr
find . -name '*_*' -print | grep -v '\.git'
find . -name '*_*' -print | grep -v '\.git' | xargs -n 1 -d '\n' git add
# push back the edits into my own github repo
git commit -a -m "fixed file names for Windows compatibility"
git push --all
NOTE: I suspect the shallow repo copy as any git checkout
would fail, even when specifying commit hashes instead of branch names, and that also when the commit was a close predecessor of the HEAD commit -- only spot checked this with a distance of about 5, had an idea and moved on that: that's where I came up with the git pull --all
which did fix the problem for me at least.
from checkout.
I'm seeing this error, too.
Our build is not yet using YAML but classic UI-style release pipe.
According to the logs, this is still using V1 git task.
Is there a way to change the task version?
Thx, Seb
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@sebdau sorry but that is the Azure DevOps product. This repo is for GitHub Actions :(
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@wl2776 this repo is for GitHub Actions. If you are seeing bugs in various Jenkins plugins please report those there.
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This is really weird, looks like the wrong GITHUB_REF and GITHUB_SHA get send to the runner, so the checkout action does not checkout the PR merge ref, instead, it tries to checkout the SHA from the PR source branch, which is wrong.
I can confirm the problem in my repo as well:
GITHUB_EVENT_NAME=pull_request
GITHUB_REF=refs/heads/PR_test <-- this should be something like refs/pull/123/merge
GITHUB_REPOSITORY=bbq-beets/ting-test
GITHUB_SHA=4ba7f853093a0989aece593b33de5e8dec7ce579
looks like this happened recently since the PR run I have last night is able to get the right merge ref.
GITHUB_EVENT_NAME=pull_request
GITHUB_REF=refs/pull/6/merge
GITHUB_REPOSITORY=bbq-beets/ting-test
GITHUB_SHA=d9fd1a7c30b9349606d0db4b9f777bcbbb4376e4
from checkout.
@jpkrohling thanks for reporting, we are investigating.
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At the moment, the payloads on re-run are currently not exactly the same as the original run, which is not what users are expecting of course. @iheanyi is working on fixing this as part of in the PR he just referenced ^
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Any news on this one? Sometimes, I have the feeling that it's fixed, but then, recent re-checks fail with the same symptom...
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@iheanyi any luck with this?
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@iheanyi I'm hitting this too, but in a slightly different pattern.
Example failed run: https://github.com/emberjs/data/pull/6655/checks?check_run_id=285284611
This is a workflow that compares the built assets of the PR to master, so it does some git maneuvering:
- checkout master, run build
- checkout $GITHUB_SHA, run build again
About 3-5% of the time we hit this, re-running the check it will be fine.
For instance in the above failure the sha was 8343c5c56fbf31675b7557155849fcc07ef91bbd
which didn't match anything I could find. It may have been a stale sha for the merge commit.
When rerunning the sha became: b8ed7472261b5984b431806beac6f33fb0c2de0e
.
In this particular failure a force-push was involved but I've hit it at around the same rate without force-push as well. I suspect this was probably a stale sha.
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@runspired Is this for re-triggering a workflow or just a regular run?
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@iheanyi regular run. I traced down the cause I think (in the twitter thread I added you to)
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Also if anyone else hits this I fixed this in my flows by using git rev-parse HEAD
to access the true SHA, and if I need to checkout another commit and come back I stash that SHA into a local file like this:
sha=$(git rev-parse --short=8 HEAD)
echo "HEAD sha=$sha"
echo "GITHUB_SHA sha=$GITHUB_SHA"
mkdir -p tmp
echo $sha > tmp/sha-for-check.txt
Which I can then access in later steps via
sha=$(cat tmp/sha-for-check.txt)
from checkout.
Just got the same error:
My PR HEAD is 60f77e1dbfcc35b60992f25edc89f9bda98c539b
But github.sha is a5adf7586c64f47a1bee01b449f663f8c7c840a4
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@ramonmedeiros in your case, is a5adf758 the merge commit? For PRs, the action checks-out the merge commit by default. If you want to checkout the PR HEAD commit, you can do this
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@iheanyi do you know whether the fix has rolled out now for the race condition?
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@ericsciple The first part has been addressed, the re-run errors that is. I'm unsure if the other issues are still occurring.
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Closing since I think this is fixed by actions/checkout@v2
. V2 fetches a specific SHA and retries with a few delays between before failing. Whereas V1 fetched the merge PR ref.
Reopen if still occurring. Noise has gone down since last comments in November. V2 preview was early December, and then GA late December so more evidence this is fixed now.
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As one can see in https://github.com/sebastianbergmann/phpunit/blob/94821def76750d335505c384d05fcb3394130615/.github/workflows/ci.yml#L52-L74, we are using actions/checkout@v2
in a job:
backward-compatibility:
name: Backward Compatibility
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v2
with:
fetch-depth: 0
- name: Fetch tags
run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
- name: Install PHP with extensions
uses: shivammathur/setup-php@v2
with:
php-version: 7.4
coverage: none
extensions: intl
- name: Run roave/backward-compatibility-check
run: ./tools/roave-backward-compatibility-check --from=9041d82604effd0d0ab59ce67eafbc3462a2ba83
As one can also see in https://github.com/sebastianbergmann/phpunit/runs/650379867#step:5:22, running a tool that checks out a different commit (which should be available) fails with
fatal: reference is not a tree: 9041d82604effd0d0ab59ce67eafbc3462a2ba83
Why?
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We also see this bug. I'd like to assist in fixing it ASAP by providing all necessary information for tracking down the issue.
Versions of the software we use:
GitHub Enterprise Server 2.20.19
Jenkins 2.249.3
Plugins:
Git 4.4.5
Git client 3.5.1
Github API 1.116
GitHub Branch Source 2.9.1
Github checks 1.0.6
Github integration 0.2.8
Github 1.32.0
GitHub Pipeline for Blue Ocean 1.24.3
from checkout.
Looks like still unfixed.
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