Github user bzz commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/870#issuecomment-216432006
ð Looks great, thank you for hotfixing!
It looks like it's flaky webapp build somehow.
```
olve@1.1.7, fileset@0.2.1, escodegen@1.8.0, js-yaml@3.6.0, handlebars@4.0.5)
[ERROR] npm ERR! Linux 3.13.0-40-generic
[ERROR] npm ERR! argv
"/home/travis/build/apache/incubator-zeppelin/zeppelin-web/node/node"
"/home/travis/build/apache/incubator-zeppelin/zeppelin-web/node/node_modules/npm/bin/npm-cli.js"
"install" "--color=false"
[ERROR] npm ERR! node v0.12.13
[ERROR] npm ERR! npm v2.15.0
[ERROR]
[ERROR] npm ERR! Callback called more than once.
[ERROR] npm ERR!
[ERROR] npm ERR! If you need help, you may report this error at:
[ERROR] npm ERR! <https://github.com/npm/npm/issues>
[ERROR]
[ERROR] npm ERR! Please include the following file with any support request:
[ERROR] npm ERR!
/home/travis/build/apache/incubator-zeppelin/zeppelin-web/npm-debug.log
[INFO]
------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Zeppelin: web Application .......................... FAILURE [10:49
min]
```
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