System unavailable: Jenkins server

[sxa]

The jenkins server was failing to schedule any jobs today. All jobs were failing trying to perform git operations. Here are a couple of examples:

• Caused: java.io.IOException: Cannot run program "git" (in directory "/home/jenkins/.jenkins/caches/git-c9f51117b722234ff35f23259fe7d884"): error=0, Failed to exec spawn helper: pid: 127452, exit value: 1
• hudson.plugins.git.GitException: Could not init /home/jenkins/.jenkins/workspace/Grinder@script/7d272c0688f17ab4e5b2f6ce77a7dc9cf4df33ff05c3a95eddd38682ef795b79/openjdk-tests

Since there was nothing queued and nothing actively running I restarted jenkins and that appears to have resolved the problem. Creating this issue for historic reference of the fact we hit this issue.

Tagging the jenkins epic #3380