Got a (staged) alert for console 500s, logs indicate this page (for example):
https://ci.chromium.org/p/dart/g/be/console?reload=60

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original error: rpc error: code = NotFound desc = not found
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goroutine 68036:
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From frame 0 to 0, the following wrappers were found:
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  internal reason: MultiError 1/1: following first non-nil error.
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#0 go.chromium.org/luci/milo/git/log.go:239 - git.(*logReq).call()
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  reason: gitiles.Log
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#1 go.chromium.org/luci/milo/git/log.go:124 - git.(*implementation).Log()
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#2 go.chromium.org/luci/milo/frontend/view_console.go:170 - frontend.consoleRowCommits()
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#3 go.chromium.org/luci/milo/frontend/view_console.go:241 - frontend.console.func1.3()
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#4 go.chromium.org/luci/common/sync/parallel/runner.go:51 - parallel.(*WorkItem).execute()
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#5 go.chromium.org/luci/common/sync/parallel/runner.go:145 - parallel.(*Runner).dispatchLoopBody.func1()
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#6 runtime/asm_amd64.s:2211 - runtime.goexit()

It loads for me at least once, so it looks like it's just panicky sometimes.