Error 500 for basic REST service in Lift Scala MongoDB while createRecord

Question

The REST service object code is:

object Account extends RestHelper {
  def createUser = {
    for {
      username <- S.param("username") ?~ "username parameter missing" ~> 400
      number <- S.param("number") ?~ "number parameter missing"
    } yield {
      val u = GeoFence.createRecord.name(username)
      u.save
      u.asJSON
    }
  }

  serve {
    case Req("api" :: "hello" :: Nil, "json", GetRequest) => JString("hi")
    case Req("api" :: "accounts" :: "new" :: Nil, "json", GetRequest) => createUser()
  }
}

This is the exception I see on browser whenever I'm trying to run the REST service.

The exception is pointing to line 27 which is:

val u = GeoFence.createRecord.name(username)

u.save

HTTP ERROR 500

Problem accessing /api/accounts/new.json. Reason:

(class: net/liftweb/record/Record$class, method: toForm signature: (Lnet/liftweb/record/Record;Lscala/Function1;)Lscala/xml/NodeSeq;) Incompatible object argument for function call

Caused by:

java.lang.VerifyError: (class: net/liftweb/record/Record$class, method: toForm signature: (Lnet/liftweb/record/Record;Lscala/Function1;)Lscala/xml/NodeSeq;) Incompatible object argument for function call at smartfamily.model.GeoFence.(GeoFence.scala:21) at smartfamily.model.GeoFence$.(GeoFence.scala:19) at smartfamily.model.GeoFence$.(GeoFence.scala) at smartfamily.api.Account$$anonfun$createUser$1$$anonfun$apply$1.apply(Account.scala:27) at smartfamily.api.Account$$anonfun$createUser$1$$anonfun$apply$1.apply(Account.scala:25) at net.liftweb.common.Full.map(Box.scala:478) at smartfamily.api.Account$$anonfun$createUser$1.apply(Account.scala:25) at smartfamily.api.Account$$anonfun$createUser$1.apply(Account.scala:24) at net.liftweb.common.Full.flatMap(Box.scala:480) at smartfamily.api.Account$.createUser(Account.scala:24) at smartfamily.api.Account$$anonfun$1.apply(Account.scala:35) at smartfamily.api.Account$$anonfun$1.apply(Account.scala:33) at net.liftweb.http.rest.RestHelper$class.apply(RestHelper.scala:472) at smartfamily.api.Account$.apply(Account.scala:21) at smartfamily.api.Account$.apply(Account.scala:21) at net.liftweb.util.NamedPF$$anonfun$applyBox$1.apply(NamedPartialFunction.scala:97) at net.liftweb.util.NamedPF$$anonfun$applyBox$1.apply(NamedPartialFunction.scala:97) at net.liftweb.common.Full.map(Box.scala:478) at net.liftweb.util.NamedPF$.applyBox(NamedPartialFunction.scala:97) at net.liftweb.http.LiftServlet.doService(LiftServlet.scala:220) at net.liftweb.http.LiftServlet$$anonfun$doIt$1$1.apply$mcZ$sp(LiftServlet.scala:129) at net.liftweb.http.LiftServlet$$anonfun$doIt$1$1.apply(LiftServlet.scala:129) at net.liftweb.http.LiftServlet$$anonfun$doIt$1$1.apply(LiftServlet.scala:129) at net.liftweb.util.TimeHelpers$class.calcTime(TimeHelpers.scala:344) at net.liftweb.util.Helpers$.calcTime(Helpers.scala:34) at net.liftweb.util.TimeHelpers$class.logTime(TimeHelpers.scala:353) at net.liftweb.util.Helpers$.logTime(Helpers.scala:34) at net.liftweb.http.LiftServlet.doIt$1(LiftServlet.scala:128) at net.liftweb.http.LiftServlet.service(LiftServlet.scala:137) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply$mcV$sp(HTTPProvider.scala:69) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply(HTTPProvider.scala:68) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2$$anonfun$apply$mcV$sp$1.apply(HTTPProvider.scala:68) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.URLRewriter$.doWith(Req.scala:1063) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply$mcV$sp(HTTPProvider.scala:67) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply(HTTPProvider.scala:67) at net.liftweb.http.provider.HTTPProvider$$anonfun$service$2.apply(HTTPProvider.scala:67) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.provider.HTTPProvider$class.service(HTTPProvider.scala:63) at net.liftweb.http.LiftFilter.service(LiftServlet.scala:689) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ServletFilterProvider.scala:67) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply(ServletFilterProvider.scala:62) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1$$anonfun$apply$mcV$sp$1.apply(ServletFilterProvider.scala:62) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13$$anonfun$apply$14$$anonfun$apply$15.apply(Vars.scala:513) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13$$anonfun$apply$14.apply(Vars.scala:512) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13.apply(Vars.scala:511) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12.apply(Vars.scala:510) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$class.apply(Vars.scala:509) at net.liftweb.http.RequestVarHandler$.apply(Vars.scala:428) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1.apply$mcV$sp(ServletFilterProvider.scala:61) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1.apply(ServletFilterProvider.scala:61) at net.liftweb.http.provider.servlet.ServletFilterProvider$$anonfun$doFilter$1.apply(ServletFilterProvider.scala:61) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13$$anonfun$apply$14$$anonfun$apply$15.apply(Vars.scala:513) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13$$anonfun$apply$14.apply(Vars.scala:512) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12$$anonfun$apply$13.apply(Vars.scala:511) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$$anonfun$apply$12.apply(Vars.scala:510) at net.liftweb.util.ThreadGlobal.doWith(ThreadGlobal.scala:71) at net.liftweb.http.CoreRequestVarHandler$class.apply(Vars.scala:509) at net.liftweb.http.TransientRequestVarHandler$.apply(Vars.scala:432) at net.liftweb.http.provider.servlet.ServletFilterProvider$class.doFilter(ServletFilterProvider.scala:60) at net.liftweb.http.LiftFilter.doFilter(LiftServlet.scala:689) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

UPDATE 1

Well it was resolved by the excellent lift community at the given link.

http://groups.google.com/group/liftweb/browse_thread/thread/e70cc3763734fdd9

The exception will be much simpler to read if you insert four spaces in front of 'java.lang.VerifyError...' — thoredge

thoredge thoredge · Accepted Answer · 2011-04-16T21:14:09

The first line in your exception is:

smartfamily.model.GeoFence.<init>(GeoFence.scala:21)

This is where you'll have to look for the problem. Your call to net.liftweb.record.Record.toForm apparently doesn't match the signature you compiled it against. I would guess that you're running your application with the wrong version of lift. Either that or your lift jar file is corrupt.

Error 500 for basic REST service in Lift Scala MongoDB while createRecord

1 Answers