| --- |
| title: Download-build-farm-failed-logs-and-debugging |
| --- |
| |
| The Go project has all build failed logs storage at GCE, which you can access by the [dashboard](https://build.golang.org/). |
| |
| You can download all the failed logs by `fetchlogs`. |
| |
| Download `fetchlogs` by `go get golang.org/x/build/cmd/fetchlogs` |
| |
| `fetchlogs` only download 300 latest failed logs by default, which is not enough for "mystery"/"flaky" bugs. |
| `fetchlogs -n <the number you want>` |
| |
| You may also want to take a look at |
| `github.com/aclements/go-misc/greplogs`. It's a useful tool by Austin |
| to run grep over logs fetched by fetchlogs. |
| |
| Also `github.com/aclements/findflakes` can make some guesses as to when a |
| flaky test started failing. |
