gerrit/Documentation/error-commit-already-exists.txt
Bruce Zu cd6572d435 Prevent duplicate commits in same project when uploading to refs/changes/n
Under certain circumstances, when pushing to 'refs/changes/n', the same
commit can be pushed onto multiple changes even if they are on the same
branch.

As a result of this, if the commit sha1 is used as change identifier
in the 'review' ssh command, it will fail with the error:

  'fatal: <SHA1> matches multiple patch sets.'

This commit performs the same check as when pushing to 'refs/for/branch'
to prevent this, and will show "commit already exists (in the project)"
error message to reject uploading a commit to an existing change via
`refs/changes/n` if the commit was already successfully pushed to a change
in project scope.

Bug: issue 2374
Change-Id: I1c000b2cc3e155617cdc9c295a46ce2107ec47ca
2014-03-11 08:26:36 +00:00

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Plaintext

commit already exists
=====================
With "commit already exists (as current patchset)" or
"commit already exists (in the change)" error message
Gerrit rejects to push a commit to an existing change via
`refs/changes/n` if the commit was already successfully
pushed to the change.
With "commit already exists (in the project)" error message
Gerrit rejects to push a commit to an existing change via
`refs/changes/n` if the commit was already successfully
pushed to a change in project scope.
In any above case there is no new commit and consequently
there is nothing for Gerrit to do.
For further information about how to resolve this error, please
refer to link:error-no-new-changes.html[no new changes].
GERRIT
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Part of link:error-messages.html[Gerrit Error Messages]