ClassNotFoundException in etlas repl after etlas build

[jneira]

• If you do a etlas clean && etlas build && etlas repl and then try to evaluate a function from some package module it throws an error. F.e. with wai-servlet-handler-jetty:

Prelude Network.Wai.Servlet.Examples Network.Wai.Servlet.Handler.Jetty> run 3000 appSimple
*** Exception: java.lang.RuntimeException: Failed during evalStmt of Eta REPL expression
        at eta.serv.REPLClassLoader.evalStmt(REPLClassLoader.java:253)
        at eta.serv.Utils.evalStmt(Utils.java:32)
        at eta_serv.eta.serv.Run$sat$21.applyV(Run.hs)
        at eta.runtime.exception.Exception.catch_(Exception.java:131)
        at eta_serv.eta.serv.Run$sat$20.applyV(Run.hs)
        at eta_serv.eta.serv.Run.$La4$1(Run.hs)
        at eta_serv.eta.serv.Run$sat$23.applyV(Run.hs)
        at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:93)
        at eta_serv.eta.serv.Run$sat$19.applyV(Run.hs)
        at eta.runtime.exception.Exception.catch_(Exception.java:131)
        at eta_serv.eta.serv.Run$sat$18.applyV(Run.hs)
        at eta.runtime.stg.Closures$EvalLazyIO.enter(Closures.java:108)
        at eta.runtime.stg.Capability.schedule(Capability.java:183)
        at eta.runtime.concurrent.WorkerThread.run(WorkerThread.java:16)
Caused by: java.lang.RuntimeException: Failed during evalIOInternal of Eta REPL expression
        at eta.serv.REPLClassLoader.evalIOInternal(REPLClassLoader.java:381)
        at eta.serv.REPLClassLoader.evalStmt(REPLClassLoader.java:246)
        ... 13 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at eta.serv.REPLClassLoader.evalIOInternal(REPLClassLoader.java:379)
        ... 14 more
Caused by: java.lang.NoClassDefFoundError: wai_servlet_handler_jetty/network/wai/servlet/handler/Jetty
        at interactive.EtaRepl1_3$sat$3.thunkEnter(Interactive.hs)
        at eta.runtime.thunk.UpdatableThunk.evaluate(UpdatableThunk.java:19)
        at base.ghc.Base.id(Base.hs:964)
        at base.ghc.Base$id.apply1(Base.hs:964)
        at interactive.EtaRepl1_3$sat$2.thunkEnter(Interactive.hs)
        at eta.runtime.thunk.UpdatableThunk.evaluate(UpdatableThunk.java:19)
        at eta.runtime.thunk.Thunk.applyV(Thunk.java:120)
        at base.ghc.Base.bindIO1(Base.hs)
        at base.ghc.Base.bindIO(Base.hs:1067)
        at base.ghc.Base$bindIO.apply2V(Base.hs:1067)
        at eta.runtime.apply.PAPSlow.apply(PAPSlow.java:64)
        at eta.runtime.apply.PAPSlow.applyV(PAPSlow.java:112)
        at eta.runtime.thunk.Thunk.applyV(Thunk.java:120)
        at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:93)
        at base.control.exception.Base$sat$25.applyV(Base.hs)
        at eta.runtime.exception.Exception.catch_(Exception.java:131)
        at base.control.exception.Base$sat$22.applyV(Base.hs:262)
        at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:44)
        at base.control.exception.Base.bracket1(Base.hs:264)
        at base.system.Environment.withArgs1(Environment.hs)
        at base.system.Environment.withArgs(Environment.hs:150)
        at base.system.Environment$withArgs.apply2V(Environment.hs:150)
        at eta.runtime.apply.PAPSlow.apply(PAPSlow.java:64)
        at eta.runtime.apply.PAPSlow.applyV(PAPSlow.java:112)
        at eta.runtime.stg.Closures$EvalIO.enter(Closures.java:133)
        at eta.runtime.stg.Capability.schedule(Capability.java:183)
        at eta.runtime.stg.Capability.scheduleClosure(Capability.java:123)
        at eta.runtime.Runtime.evalIO(Runtime.java:358)
        ... 19 more
Caused by: java.lang.ClassNotFoundException: wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty
        at java.net.URLClassLoader.findClass(Unknown Source)
        at eta.serv.REPLClassLoader$ChildREPLClassLoader.loadClass(REPLClassLoader.java:69)
        ... 47 more

• If you do etlas clean && etlas repl the error is not thrown

[jneira]

@rahulmutt has suggested that it could be a issue involving the compiler (i.e eta) and not (or not only) etlas

[jneira]

Maybe related with #805. Anyway they could be resolved in one shot

[rahulmutt]

#805 is slightly different since that involves figuring out how to maintain a folder containing compiled class files and reloading them when there are changes to source .java files.