Unable to run lift_basic: error while loading CharSequence from rt.jar

[Dan Pidcock]

Hello All,

I'm just trying to get started with Lift, but am unable to get the lift_basic demo app running.

(On Windows 8) I run sbt.bat, but it fails at:
C:\lift-lift_25_sbt-b739b55\scala_29\lift_basic>java -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=256m -Xmx1024M -Xss2M -jar "C:\lift-lift_25_sbt-b739b55\scala_29\lift_basic\\sbt-launch-0.12.1.jar"
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support wa
s removed in 8.0
error: error while loading CharSequence, class file 'C:\Program Files\Java\jre8\lib\rt.jar(java/lang/CharSequence.class)' is broken
(bad constant pool tag 15 at byte 1470)
[error] Type error in expression

I have tried this with both the Lift 2.5 and 2.6, and with the scala 2.9 and 2.10 variants in Lift 2.5.

I have java 1.8.0 installed, and scala 2.10.4 (although as I understand it, Lift is not dependant on the installed scala)

Googling found me http://stackoverflow.com/questions/18842985/scala-repl-startup-error-class-file-is-broken, which although is not exactly the same behaviour (my installed scala works fine), suggests to me that there is a problem with the version of java installed and the version expected by Lift, although this seems unlikely as the Lift cookbook states Java 1.5 or later.

Any ideas as to what I need to do?

Thanks in advance,

Dan

[Diego Medina]

The problem is not lift but sbt. The templates that we provide use sbt 0.12, but I think sbt 0.12 does not support java 8.

 

I have java 1.8.0 installed, and scala 2.10.4 (although as I understand it, Lift is not dependant on the installed scala)

Just to clarify things (as they are not so clear for most new users), it is sbt, the build system that most scala project use, that ignores the scala version you have on your machine

So, if you could, change to java 7 and that will allow you to try out the templates, on the long term, we'll work on getting lift templates that use the newer sbt.

Thank you

Diego

 

Googling found me http://stackoverflow.com/questions/18842985/scala-repl-startup-error-class-file-is-broken, which although is not exactly the same behaviour (my installed scala works fine), suggests to me that there is a problem with the version of java installed and the version expected by Lift, although this seems unlikely as the Lift cookbook states Java 1.5 or later.

Any ideas as to what I need to do?

Thanks in advance,

Dan

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http://fmpwizard.telegr.am

[Dan Pidcock]

On 10 April 2014 16:06, Diego Medina <di...@fmpwizard.com> wrote:

The problem is not lift but sbt. The templates that we provide use sbt 0.12, but I think sbt 0.12 does not support java 8.

 

I have java 1.8.0 installed, and scala 2.10.4 (although as I understand it, Lift is not dependant on the installed scala)

Just to clarify things (as they are not so clear for most new users), it is sbt, the build system that most scala project use, that ignores the scala version you have on your machine

So, if you could, change to java 7 and that will allow you to try out the templates, on the long term, we'll work on getting lift templates that use the newer sbt. 

 

Thanks Diego, very helpful - I will do that.

Dan 

[Viktor Hedefalk]

I think its invokeDynamic that the Scala compiler couldn't parse until
this commit:

https://github.com/scala/scala/commit/e78896f0ab7#L5R137

which is >= 2.10.2

Some discussion here:

Cheers,
Viktor

[Viktor Hedefalk]

whoops, some weird shortcut in gmail made me send this to early.
Here's the link:

https://groups.google.com/forum/#!topic/scala-user/Nzc2zUTyays

Thanks,
Viktor

[phongphan.p]

The following configuration (patch) works for me. The sbt-launch-0.12.1.jar must be upgraded to sbt-launch-0.13.1.jar.

-----------------------------------
diff --git a/scala_210/lift_basic/build.sbt b/scala_210/lift_basic/build.sbt
index 7e928f1..2006a10 100644
--- a/scala_210/lift_basic/build.sbt
+++ b/scala_210/lift_basic/build.sbt
@@ -4,14 +4,14 @@ version := "0.0.3"
 
 organization := "net.liftweb"
 
-scalaVersion := "2.10.0"
+scalaVersion := "2.10.4"
 
 resolvers ++= Seq("snapshots"     at "http://oss.sonatype.org/content/repositories/snapshots",
                   "staging"       at "http://oss.sonatype.org/content/repositories/staging",
                   "releases"      at "http://oss.sonatype.org/content/repositories/releases"
                  )
 
-seq(com.github.siasia.WebPlugin.webSettings :_*)
+seq(webSettings :_*)
 
 unmanagedResourceDirectories in Test <+= (baseDirectory) { _ / "src/main/webapp" }
 
@@ -24,6 +24,7 @@ libraryDependencies ++= {
     "net.liftweb"       %% "lift-mapper"        % liftVersion        % "compile",
     "net.liftmodules"   %% "lift-jquery-module_2.6" % "2.5",
     "org.eclipse.jetty" % "jetty-webapp"        % "8.1.7.v20120910"  % "container,test",
+    "org.eclipse.jetty" % "jetty-plus"          % "8.1.7.v20120910"  % "container,test", // For Jetty Config
     "org.eclipse.jetty.orbit" % "javax.servlet" % "3.0.0.v201112011016" % "container,test" artifacts Artifact("javax.servlet", "jar", "jar"),
     "ch.qos.logback"    % "logback-classic"     % "1.0.6",
     "org.specs2"        %% "specs2"             % "1.14"             % "test",
diff --git a/scala_210/lift_basic/project/build.properties b/scala_210/lift_basic/project/build.properties
index f0f72ac..1bb3aa3 100644
--- a/scala_210/lift_basic/project/build.properties
+++ b/scala_210/lift_basic/project/build.properties
@@ -1,2 +1,2 @@
-sbt.version=0.12.4
+sbt.version=0.13.1
 
diff --git a/scala_210/lift_basic/project/plugins.sbt b/scala_210/lift_basic/project/plugins.sbt
index 44fc204..3b34fdb 100644
--- a/scala_210/lift_basic/project/plugins.sbt
+++ b/scala_210/lift_basic/project/plugins.sbt
@@ -1,13 +1,8 @@
-libraryDependencies <+= sbtVersion(v => v match {
-  case "0.11.0" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.0-0.2.8"
-  case "0.11.1" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.1-0.2.10"
-  case "0.11.2" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.2-0.2.10"
-  case "0.11.3" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.3-0.2.11.1"
-  case x if x startsWith "0.12" => "com.github.siasia" %% "xsbt-web-plugin" % "0.12.0-0.2.11.1"
-})
+//Enable the sbt web plugin
+addSbtPlugin("com.earldouglas" % "xsbt-web-plugin" % "0.7.0")
 
 //Enable the sbt idea plugin
-addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.3.0")
+addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.6.0")
 
 //Enable the sbt eclipse plugin
-addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.2")
+addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.4.0")
-----------------------------------

Cheers,

Phongphan

[Antonio Salazar Cardozo]

This seems like it would best be provided as a pull request on the appropriate github repository?

Thanks,

Antonio

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Lift, the simply functional web framework: http://liftweb.net
Code: http://github.com/lift
Discussion: http://groups.google.com/group/liftweb
Stuck? Help us help you: https://www.assembla.com/wiki/show/liftweb/Posting_example_code

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[Diego Medina]

This is the kind of contribution that we accept from non-committers of the lift project, would you like to send one?

thanks

[phongphan.p]

Yes, I do :)

Pull request created here. https://github.com/lift/lift_26_sbt/pull/3

cheers,

phongphan

[Peter Petersson]

Awesome!
LGTM

best regards Peter Petersson

[Diego Medina]

Thanks very much for the pull request!

[David Barri]

Brilliant!

[Dan Pidcock]

Thanks Phongphan, I've now had a chance to try it out and the patch (from github) works perfectly!

Dan

On 11 April 2014 03:33, David Barri <japg...@gmail.com> wrote:

Brilliant!