For every pushed commit Gerrit verifies that the e-mail address of the committer matches one of the registered e-mail addresses of the pushing user. If this is not the case pushing the commit fails with the error message "invalid committer". This policy can be bypassed by having the access right 'Forge Committer'.
This error may happen for two reasons:
incorrect configuration of the e-mail address on client or server side
missing privileges to push commits that were committed by other users
Incorrect configuration of the e-mail address on client or server side
If pushing to Gerrit fails with the error message "invalid committer" and you committed the change for which the push fails, then either you have not successfully registered this e-mail address for your Gerrit account or the committer information of the pushed commit is incorrect.
Configuration of e-mail address in Gerrit
Check in Gerrit under 'Settings → Identities' which e-mail addresses you’ve configured for your Gerrit account. If no e-mail address is registered go to 'Settings → Contact Information' and register a new e-mail address there. Make sure you confirm your e-mail address by clicking on the link in the e-mail verification mail sent by Gerrit.
Incorrect committer information
For every commit Git maintains the user who did the commit, the so called committer. Git computes the committer out of the Git configuration parameters 'user.name' and 'user.email'.
$ git config -l ... user.name=John Doe firstname.lastname@example.org ...
A commit done with the above Git configuration would have "John Doe <email@example.com>" as committer.
To see the committer information for existing commits do "git log --format=full":
$ git log --format=full commit cbe31bdba7d14963eb42f7e1e0eef1fe58698c05 Author: John Doe <firstname.lastname@example.org> Commit: John Doe <email@example.com> my commit
Check in Git that the committer information of the commit that should be pushed is correct. As explained above you can do this by 'git log --format=full'. The committer should have the same e-mail address that you’ve configured for your Gerrit account. If the committer information is incorrect set the Git configuration parameters 'user.name' and 'user.email' to the correct values (you might want to set this globally by including the option '--global'):
$ git config user.name "John Doe" $ $ git config user.email firstname.lastname@example.org $
Now you should rewrite the commits for which the committer information is wrong. If only the last commit is affected you can do this by doing a 'commit --amend'. If you need to update the committer information for several commits it gets more complicated. In this case you have to do an interactive git rebase for the affected commits. While doing the interactive rebase you have to ensure that the commits are rewritten (e.g. by choosing 'reword' for all these commits and then confirming all the commit messages). Just picking all the changes will not work as in this case the committer is not rewritten. For further details about git rebase please check the Git documentation.
Missing privileges to push commits that were committed by other users
If pushing to Gerrit fails with the error message "invalid committer" and somebody else committed the change for which the push fails, then you have no permissions to forge the committer identity. In this case you may contact the project owner to request the 'Forge Committer' access right or ask the maintainer to commit this change on the author’s behalf.
Part of Gerrit Error Messages