git plugin 2.2.5
git client 1.10.1
gerrit plugin 2.2.1
user has .ssh folder with the SSH key configured to access gerrit
no passphrase is used to generate the key, master is printing this error message;
Gerrit is the SSH manager, the url for the repos is of the same format for all projects "server:/project"
As there is no other info but just this cryptic error i can't say which builds are triggering this, but seems like not all of them or not everytime.
"All works" means that there is no problems accessing Gerrit server and getting info from it or send info to it - i.e. configuration is correct, builds are going fine.
Hope that helps