Automated Build fails to deploy the code

Issue

Automated Build(Jenkins) has suddenly stopped working & not able to deploy code from Remote Repository to Acquia server & throwing error as:

ssh_exchange_identification: Connection closed by remote host
fatal: Could not read from remote repository.

Resolution

• Change to the jenkins user and run the command manually:

git ls-remote -h [email protected]:person/projectmarket.git HEAD

• copy

  You will get the standard SSH warning when first connecting to a new host via SSH:

The authenticity of host 'bitbucket.org (207.223.240.181)' can't be established.
RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
Are you sure you want to continue connecting (yes/no)?

• copy

  Type yes and press Enter. The host key for Remote Repository will now be added to the ~/.ssh/known_hosts file and you won't get this error in Jenkins anymore.​​​​

Cause

The issue happens when Acquia reboots/relaunches the Git repository server due to some issues, which probably changes the host key.