在浏览器中点击app时播放框架挂起 [英] Play Framework Hanging when hitting app in browser

问题描述

我正在使用激活器运行在Play中运行应用程序，当我去时，它可能会挂起5次中的3次http：// localhost：9000 / ，它只是坐在那里永远旋转。

I am running an app in Play using activator run, and maybe 3 out of 5 times, it will just hang, when I go to http://localhost:9000/, it just sits there spinning forever.

我看到很多承诺超时错误。

我应该在哪里寻找这个问题？

Where should I look for this issue?

我开始使用 logLevel：= Level.Debug ，但我没有看到任何错误。当应用程序正在旋转时，我看不到任何记录。

I turned up logging with logLevel := Level.Debug, but I see nothing amiss. While the app is spinning, I see no logging at all.

如果我让它坐下并旋转很长时间时间（~5分钟）它最终会给出这个错误：

If I just let it sit and spin for a long time (~5 min) it will eventually give this error:

[info] play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[PrivilegedActionException: null]]
[info]  at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:265) ~[play_2.11-2.4.3.jar:2.4.3]
[info]  at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:191) ~[play_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.Server$class.logExceptionAndGetResult$1(Server.scala:50) [play-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:59) [play-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:57) [play-server_2.11-2.4.3.jar:2.4.3]
[info]  at scala.util.Either$RightProjection.flatMap(Either.scala:522) [scala-library.jar:na]
[info]  at play.core.server.Server$class.getHandlerFor(Server.scala:57) [play-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.NettyServer.getHandlerFor(NettyServer.scala:33) [play-netty-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$8.apply(PlayDefaultUpstreamHandler.scala:139) [play-netty-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$8.apply(PlayDefaultUpstreamHandler.scala:139) [play-netty-server_2.11-2.4.3.jar:2.4.3]
[info] Caused by: java.security.PrivilegedActionException: null
[info]  at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_20]
[info]  at play.runsupport.Reloader$.play$runsupport$Reloader$$withReloaderContextClassLoader(Reloader.scala:39) ~[na:na]
[info]  at play.runsupport.Reloader.reload(Reloader.scala:321) ~[na:na]
[info]  at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:113) ~[play-server_2.11-2.4.3.jar:2.4.3]
[info]  at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:111) ~[play-server_2.11-2.4.3.jar:2.4.3]
[info]  at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library.jar:na]
[info]  at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library.jar:na]
[info]  at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1423) ~[na:1.8.0_20]
[info]  at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[na:1.8.0_20]
[info]  at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902) ~[na:1.8.0_20]
[info] Caused by: java.util.concurrent.TimeoutException: Futures timed out after [300000 milliseconds]
[info]  at scala.concurrent.impl.Promise$DefaultPromise.ready(Promise.scala:219) ~[scala-library.jar:na]
[info]  at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:223) ~[scala-library.jar:na]
[info]  at scala.concurrent.Await$$anonfun$result$1.apply(package.scala:190) ~[scala-library.jar:na]
[info]  at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:53) ~[scala-library.jar:na]
[info]  at scala.concurrent.Await$.result(package.scala:190) ~[scala-library.jar:na]
[info]  at play.forkrun.ForkRun$$anonfun$askForReload$1.apply(ForkRun.scala:127) ~[na:na]
[info]  at play.forkrun.ForkRun$$anonfun$askForReload$1.apply(ForkRun.scala:125) ~[na:na]
[info]  at play.runsupport.Reloader$$anonfun$reload$1.apply(Reloader.scala:323) ~[na:na]
[info]  at play.runsupport.Reloader$$anon$3.run(Reloader.scala:43) ~[na:na]
[info]  at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_20]

---

我应该提到这是一个非常简单的应用程序。到目前为止，除了渲染一些HTML之外什么也没做。

---

I should mention that this is a very simple app. It is doing nothing but rendering some HTML so far.

它太糟糕了，因为它似乎有很多在框架中很好，但它只是慢并且非常不可靠。

Its too bad, because it seems like there is a lot of good in the framework, but it is just slow and terribly unreliable.

推荐答案

fork in run：= true 总是在从Activators UI（用于产生进程）启动应用程序时添加，因此停止使用给定应用程序的UI（可能在IDE中添加启动配置）或始终记住clear / comment /设置为false。

fork in run := true is added always when starting the app from Activators UI (for spawning processes) so stop using UI for given app (maybe add startup config in your IDE) or always remember to clear/comment/set to false.

这篇关于在浏览器中点击app时播放框架挂起的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！