java - Playframework 2.4 Java - 默认 "play-java"模板需要 1 分钟以上才能运行/不热重载

Question

我使用 Play Framework 2.4 的默认“play-java”模板，当我运行 activator run 时，加载需要 1 分 40 秒。这是典型的吗？看起来速度很慢。

此外，如果我对 Controller 进行更改...只需将 System.out.println("test") 添加到index()，下次我在浏览器中点击刷新时它将更新约10秒。如果我随后将其删除，热重载将停止工作。重新加载需要很长时间，最终失败并出现错误:

[error] - application - 
[info] 
[info] ! @6mg97jmb5 - Internal server error, for (GET) [/importplaylist?url=www.bob.com] ->
[info]  
[info] play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[TimeoutException: Futures timed out after [300000 milliseconds]]]
[info]  at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:254) ~[play_2.11-2.4.0.jar:2.4.0]
[info]  at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:180) ~[play_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.Server$class.logExceptionAndGetResult$1(Server.scala:50) [play-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:59) [play-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:57) [play-server_2.11-2.4.0.jar:2.4.0]
[info]  at scala.util.Either$RightProjection.flatMap(Either.scala:522) [scala-library-2.11.6.jar:na]
[info]  at play.core.server.Server$class.getHandlerFor(Server.scala:57) [play-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.NettyServer.getHandlerFor(NettyServer.scala:33) [play-netty-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$8.apply(PlayDefaultUpstreamHandler.scala:139) [play-netty-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$8.apply(PlayDefaultUpstreamHandler.scala:139) [play-netty-server_2.11-2.4.0.jar:2.4.0]
[info]  at scala.util.Either.fold(Either.scala:99) [scala-library-2.11.6.jar:na]
[info]  at play.core.server.netty.PlayDefaultUpstreamHandler.messageReceived(PlayDefaultUpstreamHandler.scala:127) [play-netty-server_2.11-2.4.0.jar:2.4.0]
[info]  at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) [netty-3.10.3.Final.jar:na]
[info]  at com.typesafe.netty.http.pipelining.HttpPipeliningHandler.messageReceived(HttpPipeliningHandler.java:62) [netty-http-pipelining-1.1.4.jar:na]
[info]  at org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.handler.codec.http.HttpContentDecoder.messageReceived(HttpContentDecoder.java:108) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:459) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) [netty-3.10.3.Final.jar:na]
[info]  at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) [netty-3.10.3.Final.jar:na]
[info]  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60-ea]
[info]  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60-ea]
[info]  at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60-ea]
[info] Caused by: java.util.concurrent.TimeoutException: Futures timed out after [300000 milliseconds]
[info]  at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:219) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:223) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.Await$$anonfun$result$1.apply(package.scala:190) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.Await$.result(package.scala:190) ~[scala-library-2.11.6.jar:na]
[info]  at play.forkrun.ForkRun$$anonfun$askForReload$1.apply(ForkRun.scala:127) ~[na:na]
[info]  at play.forkrun.ForkRun$$anonfun$askForReload$1.apply(ForkRun.scala:125) ~[na:na]
[info]  at play.runsupport.Reloader.reload(Reloader.scala:305) ~[na:na]
[info]  at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:113) ~[play-server_2.11-2.4.0.jar:2.4.0]
[info]  at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:111) ~[play-server_2.11-2.4.0.jar:2.4.0]
[info]  at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library-2.11.6.jar:na]
[info]  at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40) ~[akka-actor_2.11-2.3.11.jar:na]
[info]  at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397) ~[akka-actor_2.11-2.3.11.jar:na]
[info]  at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) ~[scala-library-2.11.6.jar:na]
[info]  at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) ~[scala-library-2.11.6.jar:na]

这让我唯一的选择是停止activator run并重新运行它......然后再等待 1 分 40 秒。这使得开发速度 super 慢。

Answer 1

我也注意到了同样的情况。尝试在 project/plugins.sbt 和 build.sbt 中注释掉未使用的插件和库依赖项。

尝试确保 Java 8 版本(通过运行 java -version)稳定 - 而不是早期访问(以 -ea 结尾)或 beta。