Can't load the UI

[nikhilRP]

Hi @fnothaft and @erictu,

I understand that Mango is still in very early stages.
I was curious about it and wanted to see how it works.

I tried building it on a linux machine (ubuntu).
I was able to start the server but when I go to http://localhost:8080, I see a error

Any idea on what I am doing wrong?

java.lang.NoSuchMethodError: javax.servlet.http.HttpServletResponse.getStatus()I
    at org.scalatra.servlet.RichResponse.status(RichResponse.scala:16)
    at org.scalatra.ScalatraContext$class.status(ScalatraContext.scala:29)
    at org.scalatra.ScalatraServlet.status(ScalatraServlet.scala:49)
    at org.scalatra.ScalatraBase$class.runActions$1(ScalatraBase.scala:165)
    at org.scalatra.ScalatraBase$$anonfun$executeRoutes$1.apply$mcV$sp(ScalatraBase.scala:175)
    at org.scalatra.ScalatraBase$$anonfun$executeRoutes$1.apply(ScalatraBase.scala:175)
    at org.scalatra.ScalatraBase$$anonfun$executeRoutes$1.apply(ScalatraBase.scala:175)
    at org.scalatra.ScalatraBase$class.org$scalatra$ScalatraBase$$cradleHalt(ScalatraBase.scala:193)
    at org.scalatra.ScalatraBase$class.executeRoutes(ScalatraBase.scala:175)
    at org.scalatra.ScalatraServlet.executeRoutes(ScalatraServlet.scala:49)
    at org.scalatra.ScalatraBase$$anonfun$handle$1.apply$mcV$sp(ScalatraBase.scala:113)
    at org.scalatra.ScalatraBase$$anonfun$handle$1.apply(ScalatraBase.scala:113)
    at org.scalatra.ScalatraBase$$anonfun$handle$1.apply(ScalatraBase.scala:113)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
    at org.scalatra.DynamicScope$class.withResponse(DynamicScope.scala:80)
    at org.scalatra.ScalatraServlet.withResponse(ScalatraServlet.scala:49)
    at org.scalatra.DynamicScope$$anonfun$withRequestResponse$1.apply(DynamicScope.scala:60)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
    at org.scalatra.DynamicScope$class.withRequest(DynamicScope.scala:71)
    at org.scalatra.ScalatraServlet.withRequest(ScalatraServlet.scala:49)
    at org.scalatra.DynamicScope$class.withRequestResponse(DynamicScope.scala:59)
    at org.scalatra.ScalatraServlet.withRequestResponse(ScalatraServlet.scala:49)
    at org.scalatra.ScalatraBase$class.handle(ScalatraBase.scala:111)
    at org.scalatra.ScalatraServlet.org$scalatra$servlet$ServletBase$$super$handle(ScalatraServlet.scala:49)
    at org.scalatra.servlet.ServletBase$class.handle(ServletBase.scala:43)
    at org.scalatra.ScalatraServlet.handle(ScalatraServlet.scala:49)
    at org.scalatra.ScalatraServlet.service(ScalatraServlet.scala:54)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
    at org.eclipse.jetty.server.Server.handle(Server.java:370)
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
    at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:667)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
    at java.lang.Thread.run(Thread.java:745) 

Thanks,
Nikhil

[erictu]

Hey Nikhil, looks like it's an error with scalatra. A similar issue was reported here: sanity/Swarm#21, which suggests that scalatra is expecting a different version of the javax.servlet api.

I would suggest trying a different version of scalatra in the pom.xml, or adding a dependency for servlet-api (http://search.maven.org/#search%7Cga%7C1%7Ca%3A%22servlet-api%22)

I'll try and build it on an ubuntu machine soon (I rebuilt it on osx and it seemed to work). Hopefully this helps somewhat.

[nikhilRP]

@erictu Thank you. I will try that.

I am planing on building a Distributed data warehouse for ENCODE (https://www.encodeproject.org) data, looks like I can use some ideas from mango.

Can I contribute to mango mean while?
If so can you mark few issues as "pick me up" which you think I can contribute to.

[erictu]

@nikhilRP Of course! The more the merrier. I'll create a gitter for this repository as well.

The html and javascript visualization elements (D3.js) are pretty easy to be added in. I'll mark those right now. The backend operations (we're mainly working on speed improvements for spark operations right now) probably require more familiarity.

What do you typically work on? I'd love to hear any input and suggestions!