From: Alex Nauda <alex@alexnauda.com>
Date: Wed, 24 Aug 2016 20:52:33 GMT
Subject: on Amazon EFS (NFS): "Reference directory conflict: refs/heads/" with status code 128
Message-ID: <CAMQLHmAraXPL=8SmMG4X_424FAzx4q2Byk8pva5wEOg7vNSqLw@mail.gmail.com>

Elastic File System (EFS) is Amazon's scalable filesystem product that
is exposed to the OS as an NFS mount. We're using EFS to host the
filesystem used by a Jenkins CI server. Sometimes when Jenkins tries
to git fetch, we get this error:
$ git -c core.askpass=true fetch --tags --progress
git@github.com:mediasilo/dodo.git
+refs/pull/*:refs/remotes/origin/pr/*
fatal: Reference directory conflict: refs/heads/
$ echo $? 128

Has anyone seen anything like this before? Any tips on how to troubleshoot it?

Related Jenkins issue: https://issues.jenkins-ci.org/browse/JENKINS-37653