Main build fails

[yurishkuro]

The main build of Jaeger docker images fails with (https://travis-ci.org/jaegertracing/jaeger/jobs/291302118):

$ if [ "$ALL_IN_ONE" == true ]; then bash ./travis/build-all-in-one-image.sh ; else echo 'skipping all_in_one'; fi
Now using node v6.11.4 (npm v3.10.10)
cd jaeger-ui && yarn install && npm run build
yarn install v0.27.5
[1/4] Resolving packages...
[2/4] Fetching packages...
error An unexpected error occurred: "https://registry.yarnpkg.com/babel-plugin-transform-react-display-name/-/babel-plugin-transform-react-display-name-6.23.0.tgz: Request failed \"500 Internal Server Error\"".
info If you think this is a bug, please open a bug report with the information provided in "/home/travis/gopath/src/github.com/uber/jaeger/jaeger-ui/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
make: *** [build_ui] Error 1

[tiffon]

Might stem from an intermittent issue with yarn:

yarnpkg/yarn#3353

@yurishkuro Would you mind triggering a rebuild?

[yurishkuro]

a couple of builds on master already succeeded today, but I did restart the build yesterday with no success.

I'll close for now.