After the Jenkins update tonight it started behaving unstably and there were several restarts recorded throughout the night. The root cause is now found and mitigated [1], Jenkins is up and stable again. There may still be slaves around that were running jobs when the master restarted which caused leftover files in the workspace.

If you had any CI jobs fail with errors unrelated to code between midnight and 8:15 GMT today - please re-trigger those. If you still get failures - please inform me or other members of the infra team to offline such slaves and perform a cleanup.

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