I recently started working at a new place where they're using scala and play for this legacy app. Unfortunately no one here is familiar with this error and I'm hoping that some much more experienced scala person can shine a bit of light here.
On Mac OS (Catalina) I'm getting these errors, but when I put everything into a linux VM, I can get it working! So, it's specific to OS X.
Java 8 SBT .13
Here's a couple of stack traces from the SBT console when trying to run the program:
[info] Loading global plugins from /Users/me/.sbt/0.13/plugins
[info] Loading project definition from /Users/me/dev/.../projectDirectory/project
[info] Set current project to RedactedProjectName (in build file:/Users/me/dev/.../projectDirectory/)
[warn] Error loading JNotify watch service: null
--- (Running the application, auto-reloading is enabled) ---
java.lang.ExceptionInInitializerError
at net.contentobjects.jnotify.macosx.JNotifyAdapterMacOSX.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at net.contentobjects.jnotify.JNotify.<clinit>(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at play.runsupport.JNotifyFileWatchService$JNotifyDelegate.ensureLoaded(FileWatchService.scala:188)
at play.runsupport.JNotifyFileWatchService$$anonfun$5.apply(FileWatchService.scala:243)
at play.runsupport.JNotifyFileWatchService$$anonfun$5.apply(FileWatchService.scala:199)
at scala.util.control.Exception$Catch$$anonfun$withTry$1.apply(Exception.scala:129)
at scala.util.control.Exception$Catch$$anonfun$withTry$1.apply(Exception.scala:129)
at scala.util.control.Exception$Catch.apply(Exception.scala:102)
at scala.util.control.Exception$Catch.withTry(Exception.scala:129)
at play.runsupport.JNotifyFileWatchService$.apply(FileWatchService.scala:199)
at play.runsupport.FileWatchService$$anon$1.delegate$lzycompute(FileWatchService.scala:80)
at play.runsupport.FileWatchService$$anon$1.delegate(FileWatchService.scala:76)
at play.runsupport.FileWatchService$$anon$1.watch(FileWatchService.scala:89)
at play.runsupport.Reloader.<init>(Reloader.scala:310)
at play.runsupport.Reloader$.reloader$lzycompute$1(Reloader.scala:210)
at play.runsupport.Reloader$.play$runsupport$Reloader$$reloader$1(Reloader.scala:210)
at play.runsupport.Reloader$.startDevMode(Reloader.scala:234)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1847)
at java.lang.Runtime.loadLibrary0(Runtime.java:871)
at java.lang.System.loadLibrary(System.java:1124)
at net.contentobjects.jnotify.macosx.JNotify_macosx.<clinit>(Unknown Source)
at net.contentobjects.jnotify.macosx.JNotifyAdapterMacOSX.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at net.contentobjects.jnotify.JNotify.<clinit>(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at play.runsupport.JNotifyFileWatchService$JNotifyDelegate.ensureLoaded(FileWatchService.scala:188)
at play.runsupport.JNotifyFileWatchService$$anonfun$5.apply(FileWatchService.scala:243)
at play.runsupport.JNotifyFileWatchService$$anonfun$5.apply(FileWatchService.scala:199)
at scala.util.control.Exception$Catch$$anonfun$withTry$1.apply(Exception.scala:129)
at scala.util.control.Exception$Catch$$anonfun$withTry$1.apply(Exception.scala:129)
at scala.util.control.Exception$Catch.apply(Exception.scala:102)
at scala.util.control.Exception$Catch.withTry(Exception.scala:129)
at play.runsupport.JNotifyFileWatchService$.apply(FileWatchService.scala:199)
at play.runsupport.FileWatchService$$anon$1.delegate$lzycompute(FileWatchService.scala:80)
at play.runsupport.FileWatchService$$anon$1.delegate(FileWatchService.scala:76)
at play.runsupport.FileWatchService$$anon$1.watch(FileWatchService.scala:89)
at play.runsupport.Reloader.<init>(Reloader.scala:310)
at play.runsupport.Reloader$.reloader$lzycompute$1(Reloader.scala:210)
at play.runsupport.Reloader$.play$runsupport$Reloader$$reloader$1(Reloader.scala:210)
at play.runsupport.Reloader$.startDevMode(Reloader.scala:234)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
java.lang.NullPointerException
at java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:1535)
at io.netty.util.internal.ConcurrentSet.add(ConcurrentSet.java:48)
at io.netty.channel.group.DefaultChannelGroup.add(DefaultChannelGroup.java:133)
at play.core.server.NettyServer.bind(NettyServer.scala:140)
at play.core.server.NettyServer.play$core$server$NettyServer$$bindChannel(NettyServer.scala:224)
at play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:216)
at play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:216)
at scala.Option.map(Option.scala:146)
at play.core.server.NettyServer.<init>(NettyServer.scala:216)
at play.core.server.NettyServerProvider.createServer(NettyServer.scala:279)
at play.core.server.NettyServerProvider.createServer(NettyServer.scala:278)
at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:235)
at play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:65)
at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
at play.core.server.DevServerStart$.mainDev(DevServerStart.scala:64)
at play.core.server.DevServerStart$.mainDevHttpMode(DevServerStart.scala:54)
at play.core.server.DevServerStart.mainDevHttpMode(DevServerStart.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at play.runsupport.Reloader$.startDevMode(Reloader.scala:234)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
at play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.lang.reflect.InvocationTargetException
[error] Total time: 1 s, completed Apr 2, 2020 4:14:45 PM
If I sbt evicted then sbt run again, the project starts, everything looks fine:
git:(master) ✗ sbt run
[info] Loading global plugins from /Users/me/.sbt/0.13/plugins
[info] Loading project definition from /Users/me/dev/.../projectDir/project
[info] Set current project to theProject (in build file:/Users/me/dev/.../projectDir/ocpapi/)
[info] Updating {file:/Users/jonbuck/dev/.../projectDir/}root...
[info] Resolving jline#jline;2.14.3 ...
[info] Done updating.
[warn] There may be incompatibilities among your library dependencies.
[warn] Here are some of the libraries that were evicted:
[warn] * com.typesafe.akka:akka-slf4j_2.11:2.4.20 -> 2.5.14
[warn] * com.typesafe.akka:akka-actor_2.11:(2.4.20, 2.5.1, 2.3.13) -> 2.5.14
[warn] Run 'evicted' to see detailed eviction warnings
[warn] Error loading JNotify watch service: null
--- (Running the application, auto-reloading is enabled) ---
[info] p.c.s.NettyServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000
(Server started, use Ctrl+D to stop and go back to the console...)
Then when I hit localhost:9000 I start seeing this:
[info] p.c.s.NettyServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000
(Server started, use Ctrl+D to stop and go back to the console...)
[warn] i.n.c.s.n.NioServerSocketChannel - Failed to create a new channel from an accepted socket.
java.lang.ExceptionInInitializerError: null
at sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder.defaultOptions(SocketChannelImpl.java:239)
at sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder.<clinit>(SocketChannelImpl.java:226)
at sun.nio.ch.SocketChannelImpl.supportedOptions(SocketChannelImpl.java:248)
at sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:166)
at sun.nio.ch.SocketAdaptor.setBooleanOption(SocketAdaptor.java:284)
at sun.nio.ch.SocketAdaptor.setTcpNoDelay(SocketAdaptor.java:319)
at io.netty.channel.socket.DefaultSocketChannelConfig.setTcpNoDelay(DefaultSocketChannelConfig.java:254)
at io.netty.channel.socket.DefaultSocketChannelConfig.<init>(DefaultSocketChannelConfig.java:54)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:391)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:389)
Caused by: java.lang.NullPointerException: null
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1847)
at java.lang.Runtime.loadLibrary0(Runtime.java:871)
at java.lang.System.loadLibrary(System.java:1124)
at sun.net.ExtendedOptionsImpl.lambda$static$0(ExtendedOptionsImpl.java:48)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.ExtendedOptionsImpl.<clinit>(ExtendedOptionsImpl.java:47)
at sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder.defaultOptions(SocketChannelImpl.java:239)
at sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder.<clinit>(SocketChannelImpl.java:226)
at sun.nio.ch.SocketChannelImpl.supportedOptions(SocketChannelImpl.java:248)
at sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:166)
[warn] i.n.c.s.n.NioServerSocketChannel - Failed to create a new channel from an accepted socket.
java.lang.NoClassDefFoundError: Could not initialize class sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder
at sun.nio.ch.SocketChannelImpl.supportedOptions(SocketChannelImpl.java:248)
at sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:166)
at sun.nio.ch.SocketAdaptor.setBooleanOption(SocketAdaptor.java:284)
at sun.nio.ch.SocketAdaptor.setTcpNoDelay(SocketAdaptor.java:319)
at io.netty.channel.socket.DefaultSocketChannelConfig.setTcpNoDelay(DefaultSocketChannelConfig.java:254)
at io.netty.channel.socket.DefaultSocketChannelConfig.<init>(DefaultSocketChannelConfig.java:54)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:391)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:389)
at io.netty.channel.socket.nio.NioSocketChannel.<init>(NioSocketChannel.java:98)
at io.netty.channel.socket.nio.NioServerSocketChannel.doReadMessages(NioServerSocketChannel.java:145)
[warn] i.n.c.s.n.NioServerSocketChannel - Failed to create a new channel from an accepted socket.
java.lang.NoClassDefFoundError: Could not initialize class sun.nio.ch.SocketChannelImpl$DefaultOptionsHolder
at sun.nio.ch.SocketChannelImpl.supportedOptions(SocketChannelImpl.java:248)
at sun.nio.ch.SocketChannelImpl.setOption(SocketChannelImpl.java:166)
at sun.nio.ch.SocketAdaptor.setBooleanOption(SocketAdaptor.java:284)
at sun.nio.ch.SocketAdaptor.setTcpNoDelay(SocketAdaptor.java:319)
at io.netty.channel.socket.DefaultSocketChannelConfig.setTcpNoDelay(DefaultSocketChannelConfig.java:254)
at io.netty.channel.socket.DefaultSocketChannelConfig.<init>(DefaultSocketChannelConfig.java:54)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:391)
at io.netty.channel.socket.nio.NioSocketChannel$NioSocketChannelConfig.<init>(NioSocketChannel.java:389)
at io.netty.channel.socket.nio.NioSocketChannel.<init>(NioSocketChannel.java:98)
at io.netty.channel.socket.nio.NioServerSocketChannel.doReadMessages(NioServerSocketChannel.java:145)
