Git Troubleshooting

Before you’re able to push your commits you have to set up your account. Make sure, you setup Git correctly.

Also, you may want to check your configuration

Permission Denied

$ git push origin HEAD:refs/for/main
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

If this error happens, double check if you are

  • Using the correct SSH user name (which is your user name on
  • If your username contains special characters (like @ or !), you must escape them using a backslash (or even better: use a username without special characters)
  • You must use an SSH key known to Gerrit
  • You must use the correct URL

The following push command (with -v) shows you the push URL (which contain

$ git push origin HEAD:refs/for/main -v
Pushing to ssh://<username>
Permission denied (publickey).
fatal: The remote end hung up unexpectedly

Debugging the SSH Connection

Try connecting to the server with using an SSH client (OpenSSH, Putty, etc.):

ssh -p 29418 <username>

If the output looks like this, everything is fine:

****    Welcome to Gerrit Code Review    ****

Hi <Name>, you have successfully connected over SSH.

Unfortunately, interactive shells are disabled.
To clone a hosted Git repository, use:

git clone ssh://<username>

Connection to closed.

Otherwise, your SSH client does not automatically choose the right private key file. By default, ssh searches for the key in ~/.ssh/id_rsa and ~/.ssh/id_dsa.

You can manually specify it using the -i parameter:

ssh -p 29418 -i <path-to-private-key> <username>

If this works, modify ~/.ssh/config to define the file name for connections to

   User <username>
   IdentityFile ~/.ssh/<keyfile>
   Port 29418

Now the connection should work without having to specify any parameters as described above.

If this does not work another issue might be that your SSH version is too new and does not accept the signature algorithm . You can test this by executing:

ssh -v -p 29418 -i <path-to-private-key> <username> 2>&1 | grep "no mutual signature algorithm"

If you see:

debug1: send_pubkey_test: no mutual signature algorithm

you need to allow the rsa Algorithm in your SSH config:

   PubkeyAcceptedKeyTypes +ssh-rsa

Push: invalid committer

$ git push -v origin HEAD:refs/for/main
Pushing to ssh://<username>
remote: ERROR:
To ssh://<username>
! [remote rejected] HEAD -> refs/for/main (invalid committer)
error: failed to push some refs to 'ssh://<username>'

This message simply means that your email address is not registered as an Web-Identity. If this error happens, just go to the website that the error message suggests: Register the email address you use to push (button “Register New Email”) - even if it is already in the dropdownlist. Click on the link you receive via email. Be sure your are already logged in on Otherwise the link does register the email address. Check if your new identity is registered ( Pushing should work now.

You are not a committer

If you are trying to push changes and get this error message, then your email address is probably not known to the system. Open Settings > Identities in Gerrit and check the email address, which is connected to your account (you can add more of them if needed). Additionally, check your setttings in Git with the following command:

git config

If needed, change it with the following command:

git config --global

You may change the user/author of your last commit with:

git commit --amend

Missing Change-Id in commit message

! [remote rejected] HEAD -> refs/for/X/X (missing Change-Id in commit message)

If pushing a commit fails with this error message, you probably did not copy the commit-hook. Make sure that the file .git/hooks/commit-msg exists and is executable.

Afterwards, you have to amend your commit to make it include the Change-Id:

git commit --amend

Push: prohibited by gerrit

If Gerrit rejects your push with:

[remote rejected] main -> main (prohibited by gerrit)

you are likely trying to do a simple git push. However, as Gerrit prohibits directly pushing to the target branches, you have to use this lengthy command:

git push origin HEAD:refs/for/<release-branch>

For example:

git push origin HEAD:refs/for/main

Push: Invalid Key Format

You get an error about an invalid key format. This might happen if you didn’t save your key in the OpenSSH format but in a proprietary format like i.e. offered by PuTTY.

Review the sections about creating a valid public/private key pair on your operating system: Setting up Gerrit (ssh)

A valid private key in OpenSSH format starts with the following lines:

Proc-Type: 4,ENCRYPTED

followed by about 25 lines of seemingly random signs.

Pushing old Patch Set again

You want to make an old patch set the current one. You cannot simply checkout Patch Set 1 and push it again, as it is refused with a “no new changes” error message.

Amend the commit using:

git commit --amend

Even without modifying the Commit Message, it gets a new SHA. This commit can be pushed again.