Yes, I agree. We need to have a guideline for PR cherry-picking.
I'm not sure if we have other tools for cherry-picking.
We can provide the Git cherry-pick procedure in the document
And point out what we should not do, such as push a test fix
or code-style fix without CR.

I will try to draft a document.

Thanks,
Penghui

On Wed, Nov 30, 2022 at 2:14 AM Michael Marshall <mmarsh...@apache.org>
wrote:

> On a practical note, do we understand what went wrong and how to
> prevent it in the future? Do we need to improve cherry-picking
> documentation or tooling for committers?
>
> - Michael
>
> On Tue, Nov 29, 2022 at 3:41 AM PengHui Li <peng...@apache.org> wrote:
> >
> > It's not only two commits
> > There are more than 10 commits with meaningless commit messages.
> > Please check the commit logs
> > https://github.com/apache/pulsar/tree/branch-2.9-backup
> >
> > > Prettifying the git commit history isn't a proper reason to do force
> > pushes
> >
> > I don't think it should be `Prettifying` here. You are not able to grep
> the
> > commit logs
> > with the keyword. It's an error commit message, not an unpretty message.
> > It will be inconvenient for users to check whether the fix is backported
> to
> > branch-2.9.
> > If we revert all of them, we will see 20~30 unreasonable commits.
> >
> > And the commit only happened these days, and we don't have a release for
> it.
> > I think it makes sense to correct it before we release it. Otherwise, the
> > error commits
> > message will persist for a long time.
> >
> > Additionally, we have a backup for branch-2.9.
> >
> > This does not mean that I support force push to branch at any time.
> > For some occasional cases, I think we can talk case by case.
> >
> > Thanks,
> > Penghui
> >
> > On Tue, Nov 29, 2022 at 3:21 PM Lari Hotari <lhot...@apache.org> wrote:
> >
> > > +1 to what Michael said.
> > >
> > > If an invalid commit gets pushed into one of the public branches, it
> will
> > > simply need to be reverted. Prettifying the git commit history isn't a
> > > proper reason to do force pushes. There could be special exceptions,
> such
> > > as when someone accidentally pushes confidential information in the git
> > > repository. That wasn't the case this time. I hope that the next time
> that
> > > there's a need for force pushes that priv...@pulsar.apache.org is
> > > consulted first.
> > >
> > > -Lari
> > >
> > > On 2022/11/28 22:51:18 Michael Marshall wrote:
> > > > I do not think we should have done a force push to rewrite two commit
> > > > messages. The problematic messages had commit hashes in their names,
> > > > so it was easy enough to figure out what went wrong and how to find
> > > > the original commit. If it was really important to fix the messages,
> I
> > > > think we should have reverted the problematic commits and re-done the
> > > > cherry pick with the desired commit messages.
> > > >
> > > > I also do not think we should allow force pushing to release branches
> > > > or to master branch in the future. In my opinion, the git history
> > > > should be immutable.
> > > >
> > > > Thanks,
> > > > Michael
> > > >
> > > >
> > > > On Fri, Nov 25, 2022 at 11:39 PM 丛搏 <bog...@apache.org> wrote:
> > > > >
> > > > > +3 binding(Penghui Li, JiWei guo, Hang Chen) +2 nonbing(Zike Yang,
> > > > > Yubiao Feng), so I will close this discussion and merge
> > > > > https://github.com/apache/pulsar/pull/18623. thanks for your
> votes.
> > > > >
> > > > > Thanks,
> > > > > bo
> > > > >
> > > > > 丛搏 <congbobo...@gmail.com> 于2022年11月25日周五 18:55写道:
> > > > > >
> > > > > > >
> > > > > > > One thing I'd like to make clear: this is a temporary solution,
> > > and we'll re-enable branch protection after the actions are performed
> (or
> > > relax to 2.9.4 released).
> > > > > > yes, after this pr: https://github.com/apache/pulsar/pull/18623
> > > merged
> > > > > > and reset branch-2.9 to commit 5ed247de3a, I will push a new PR
> to
> > > the
> > > > > > master branch to open the branch-2.9 force push
> > > > > > >
> > > > > > > If it's the case, please file an issue and assign yourself to
> > > revert on time :)
> > > > > > if no one is against it in 24 hours, this discussion will be
> approved
> > > > > > then merge https://github.com/apache/pulsar/pull/18623 then
> reset
> > > > > > branch-2.9 to commit 5ed247de3a
> > > >
> > >
>

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