Jenkins Startup warning cannot find files

[Sverre Moe]

During each startup Jenkins comes out with a lot of:

WARNING Could not find file /var/lib/jenkins/jobs/projectA/branches/*****

It is Multibranch pipeline projects.

What is this about and how can I fix it?

[Ivan Fernandez Calvo]

Without the whole exception it is difficult to help you on something, however this error could be related to previous errors, you have to check the first exceptions in logs would be the real cause to cannot read files, also check the warnings and errors in manage Jenkins page, I bet you have plugins that failed to load for some break dependency, if so update your plugins is the solution.

[Sverre Moe]

There was no more output. Just two lines of Warning, lots of them

2019.04.04 10:30.00 com.cloudbees.hudson.plugins.folder.AbstractFolder loadChildren

WARNING: Could not find file /var/lib/jenkins/jobs/projectName/branches/branchName/config.xml

[Sverre Moe]

It seems these are old builds, that no longer exists. We keep only the last N builds.

I have not checked all, but I think I can say that they all are probably from old builds that no longer exists.