ScalaTest运行时Scala播放Slick RejectedExecutionException [英] Scala Play Slick RejectedExecutionException on ScalaTest runs

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问题描述

我的FlatSpec测试正在抛出:

My FlatSpec tests are throwing:

 java.util.concurrent.RejectedExecutionException: Task slick.backend.DatabaseComponent$DatabaseDef$$anon$2@dda460e rejected from java.util.concurrent.ThreadPoolExecutor@4f489ebd[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 2]

但是只有当我运行多个套件时,才在第二个套件上运行;似乎有些测试之间没有重置.我正在使用OneAppPerSuite提供应用上下文.每当我使用OneAppPerTest时,它在第一个测试/套件之后都会再次失败.

But only when I run more than one suite, on the second suite forward; it seems there's something that isn't reset between tests. I'm using OneAppPerSuite to provide the app context. Whenever I use OneAppPerTest, it fails again after the first test/Suite.

我设置了override def beforeEach = tables.foreach ( _.truncate )来清除表,其中truncate只是从表中删除所有内容:Await.result (db.run (q.delete), Timeout.Inf)

I have a override def beforeEach = tables.foreach ( _.truncate ) set up to clear the tables, where truncate just deletes all from a table: Await.result (db.run (q.delete), Timeout.Inf)

我的DAO层具有以下设置:

I have the following setup for my DAO layer:

SomeMappedDaoClass extends SomeCrudBase with HasDatabaseConfig

其中

trait SomeCrudBase { self: HasDatabaseConfig => 
  override lazy val dbConfig = DatabaseConfigProvider.get[JdbcProfile](Play.current)
  implicit lazy val context = Akka.system.dispatchers.lookup("db-context")
}

application.conf

db-context {
  fork-join-executor {
    parallelism-factor = 5
    parallelism-max = 100
  }
}

我正在重构代码,使其脱离Play的Guice DI.以前,当它具有@Inject() (val dbConfigProvider: DatabaseConfigProvider)并扩展了HasDatabaseConfigProvider而不是在DAO类上时,一切都运行良好.现在不知道了,我也不知道为什么.

I was refactoring the code to move away from Play's Guice DI. Before, when it had @Inject() (val dbConfigProvider: DatabaseConfigProvider) and extended HasDatabaseConfigProvider instead on the DAO classes, everything worked perfectly. Now it doesn't, and I don't know why.

提前谢谢!

推荐答案

SomeMappedDaoClassobject只是出于兴趣? (我知道它说的是课程,但是...).

Just out of interest is SomeMappedDaoClass an object? (I know it says class but...).

当测试Play框架时,在处理object建立与Play框架各部分的连接的问题时,我遇到了此类问题.

When testing the Play framework I have run into this kind of issue when dealing with objects that setup connections to parts of the Play Framework.

在测试之间和测试文件之间,播放app被终止并重新启动,但是,创建的object仍然存在(因为它们是object,因此它们在JVM上下文中被初始化过一次-我认为)

Between tests and between test files the Play app is killed and restarted, however, the objects created persist (because they are objects, they are initialised once within a JVM context--I think).

这可能导致object具有连接(用于测试,演员,其他任何东西),该连接引用测试中使用的app的第一个实例.当app终止并且新的测试开始新的app时,该连接现在没有指向任何对象.

This can result in an object with a connection (be it for slick, an actor, anything...) that is referencing the first instance of the app used in a test. When the app is terminated and a new test starts a new app, that connection is now pointing to nothing.

这篇关于ScalaTest运行时Scala播放Slick RejectedExecutionException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!

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