Replicate failing scripted test on Windows

[mdedetrich]

Create a replicated failing scripted test on Windows

[eed3si9n]

Looks like we got some:

Caused by: java.net.SocketException: socket closed
	at java.net.DualStackPlainSocketImpl.accept0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketAccept(DualStackPlainSocketImpl.java:131)
	at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
	at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:199)
	at java.net.ServerSocket.implAccept(ServerSocket.java:560)
	at java.net.ServerSocket.accept(ServerSocket.java:528)
	at xsbt.IPC$Server.connection(IPC.scala:69)
	at sbt.scriptedtest.SbtHandler.receive(SbtHandler.scala:77)
	at sbt.scriptedtest.SbtHandler.$anonfun$apply$1(SbtHandler.scala:33)
	at sbt.scriptedtest.SbtHandler.$anonfun$apply$1$adapted(SbtHandler.scala:31)
	at sbt.scriptedtest.SbtHandler.onSbtInstance(SbtHandler.scala:39)
	at sbt.scriptedtest.SbtHandler.apply(SbtHandler.scala:31)
	at sbt.scriptedtest.SbtHandler.apply(SbtHandler.scala:23)
	at sbt.scriptedtest.BatchScriptRunner.$anonfun$processStatement$1(BatchScriptRunner.scala:51)

[mdedetrich]

Unfortunately this is not the same error, we are looking for a client refusing to connect, i.e.

Error:  java.net.ConnectException: Connection refused: connect
Error:  	at java.base/java.net.PlainSocketImpl.connect0(Native Method)
Error:  	at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101)
Error:  	at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
Error:  	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
Error:  	at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
Error:  	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
Error:  	at java.base/java.net.Socket.connect(Socket.java:609)
Error:  	at java.base/java.net.Socket.connect(Socket.java:558)
Error:  	at java.base/java.net.Socket.<init>(Socket.java:454)
Error:  	at java.base/java.net.Socket.<init>(Socket.java:264)
Error:  	at xsbt.IPC$.client(IPC.scala:21)
Error:  	at sbt.BasicCommands$.readMessage(BasicCommands.scala:472)
Error:  	at sbt.BasicCommands$.doRead(BasicCommands.scala:448)
Error:  	at sbt.BasicCommands$.$anonfun$read$2(BasicCommands.scala:435)
Error:  	at sbt.Command$.$anonfun$applyEffect$4(Command.scala:150)
Error:  	at sbt.Command$.$anonfun$applyEffect$2(Command.scala:145)
Error:  	at sbt.Command$.process(Command.scala:189)
Error:  	at sbt.MainLoop$.$anonfun$processCommand$5(MainLoop.scala:245)
Error:  	at scala.Option.getOrElse(Option.scala:189)
Error:  	at sbt.MainLoop$.process$1(MainLoop.scala:245)
Error:  	at sbt.MainLoop$.processCommand(MainLoop.scala:276)
Error:  	at sbt.MainLoop$.$anonfun$next$5(MainLoop.scala:163)
Error:  	at sbt.State$StateOpsImpl$.runCmd$1(State.scala:289)
Error:  	at sbt.State$StateOpsImpl$.process$extension(State.scala:325)
Error:  	at sbt.MainLoop$.$anonfun$next$4(MainLoop.scala:163)
Error:  	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:23)
Error:  	at sbt.MainLoop$.next(MainLoop.scala:163)
Error:  	at sbt.MainLoop$.run(MainLoop.scala:144)
Error:  	at sbt.MainLoop$.$anonfun$runWithNewLog$1(MainLoop.scala:119)
Error:  	at sbt.io.Using.apply(Using.scala:27)
Error:  	at sbt.MainLoop$.runWithNewLog(MainLoop.scala:112)
Error:  	at sbt.MainLoop$.runAndClearLast(MainLoop.scala:66)
Error:  	at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:51)
Error:  	at sbt.MainLoop$.runLogged(MainLoop.scala:42)
Error:  	at sbt.StandardMain$.runManaged(Main.scala:218)
Error:  	at sbt.xMain$.$anonfun$run$11(Main.scala:133)
Error:  	at sbt.internal.util.Terminal$.withStreams(Terminal.scala:381)
Error:  	at sbt.xMain$.withStreams$1(Main.scala:87)
Error:  	at sbt.xMain$.run(Main.scala:121)
Error:  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Error:  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Error:  	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Error:  	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
Error:  	at sbt.internal.XMainConfiguration.run(XMainConfiguration.java:56)
Error:  	at sbt.xMain.run(Main.scala:46)
Error:  	at xsbt.boot.Launch$.$anonfun$run$1(Launch.scala:149)
Error:  	at xsbt.boot.Launch$.withContextLoader(Launch.scala:176)
Error:  	at xsbt.boot.Launch$.run(Launch.scala:149)
Error:  	at xsbt.boot.Launch$.$anonfun$apply$1(Launch.scala:44)
Error:  	at xsbt.boot.Launch$.launch(Launch.scala:159)
Error:  	at xsbt.boot.Launch$.apply(Launch.scala:44)
Error:  	at xsbt.boot.Launch$.apply(Launch.scala:21)
Error:  	at xsbt.boot.Boot$.runImpl(Boot.scala:78)
Error:  	at xsbt.boot.Boot$.run(Boot.scala:73)
Error:  	at xsbt.boot.Boot$.main(Boot.scala:21)
Error:  	at xsbt.boot.Boot.main(Boot.scala)

The important part in the stacktrace is Error: at xsbt.IPC$.client(IPC.scala:21).

I think whats happening in the case you pointed out is that the sbt server unexpectedly quite (for some reason) which terminated the server earlier than expected. I get the impression that in general a lot of the scripted tests are failing because of Windows specific differences (i.e. crlf/no symbolic links by default) which might be causing

Caused by: java.net.SocketException: socket closed

as an unintended consequence.

[mdedetrich]

So to confirm that the client method is being called I changed it to

def client[T](port: Int)(f: IPC => T): T = throw new Exception("This is fun")

And it is indeed getting thrown. I will now increase the backlog value of this PR to see if it is making an effect on the java.net.SocketException just to see if it is indeed related to the original java.net.ConnectException: Connection refused: connect exception.

[mdedetrich]

@eed3si9n So out of curiosity, I changed the backlog value to 50 in this PR to see if it would have an effect on the java.net.SocketException: socket closed errors and it had no effect, so I think its unrelated, i.e.

Caused by: java.net.SocketException: socket closed
[info] [error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:282)
	at java.net.DualStackPlainSocketImpl.accept0(Native Method)

from https://github.com/sbt/sbt/actions/runs/3656457856/jobs/6178927130#step:19:2695