This is my pipeline step: 

recordIssues enabledForFailure: true, ignoreFailedBuilds: false, failedTotalHigh: 1, failedTotalNormal: 1, tools: [flake8(pattern: 'flake8*.txt')]

This report follows JENKINS-55273, which was a much bigger problem because it prevented the recordIssues step from completing and failed the build unless "blameDisabled: true" was added to the step.

It looks like the JGit library can't find some git objects, though it's not obvious to me why that's the case. The code was checked out by the Jenkins git plugin using standard git commands.

Versions:

• Git client 2.7.4
• Git plugin 3.9.1
• Git 2.5