Github user jongyoul commented on the issue:
https://github.com/apache/zeppelin/pull/1944
@Leemoonsoo Since initializing Helium, helium tried to load httpclient but
it couldn't do and error occurs like this
```
Caused by: java.lang.NoClassDefFoundError:
org/apache/http/client/methods/HttpUriRequest
at
com.github.eirslett.maven.plugins.frontend.lib.FrontendPluginFactory.getNPMInstaller(FrontendPluginFactory.java:29)
at
org.apache.zeppelin.helium.HeliumVisualizationFactory.installNodeAndNpm(HeliumVisualizationFactory.java:80)
at
org.apache.zeppelin.helium.HeliumVisualizationFactory.<init>(HeliumVisualizationFactory.java:74)
at
org.apache.zeppelin.helium.HeliumVisualizationFactory.<init>(HeliumVisualizationFactory.java:60)
at
org.apache.zeppelin.server.ZeppelinServer.<init>(ZeppelinServer.java:121)
... 29 more
Caused by: java.lang.ClassNotFoundException:
org.apache.http.client.methods.HttpUriRequest
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
```
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
