使用 akka 2.5.24 构建基本 scala 2.12.8 项目时 sbt 0.13.1 中未解决的依赖关系

【问题标题】：Unresolved dependencies in sbt 0.13.1 while building basic scala 2.12.8 project using akka 2.5.24使用 akka 2.5.24 构建基本 scala 2.12.8 项目时 sbt 0.13.1 中未解决的依赖关系
【发布时间】：2019-12-25 00:09:36
【问题描述】：

嗯，我必须在 Scala 中为我的计算机网络课程编写一个客户端-服务器程序。我在begginng，只是想在Scala 2.12.8 中使用akka 2.5.24 编译一些hello world（因为它有网络设施）。但是当我使用 sbt 0.13.1 执行 $ sbt run 时，我遇到了未解决的依赖问题。

在这个任务中，我试图在 Fedora 30 中运行下面的代码。我已经尝试更改 scala 和 akka 版本，删除 ~/.sbt 和 ~/.iv2 并使用另一个 sbt 版本（1.2.8 ）。所有的尝试都没有成功。下面我展示了 sbt 0.13.1 的尝试。

scala 代码：

import akka.actor.{ Actor, ActorRef, Props }
import akka.io.{ IO, Tcp }
import akka.util.ByteString
import java.net.InetSocketAddress

sbt 配置：

name := "scala-transfer-file"

version := "0.1"

scalaVersion := "2.12.8"

resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"

libraryDependencies += "com.typesafe.akka" % "akka-actor" % "2.5.24"

我只是在等待成功消息或其他东西，因为它只是导入包。但我得到的是

[info] Set current project to scala-transfer-file (in build file:/home/canmarshavelife/git/scala-transfer-file/)
[info] Updating {file:/home/canmarshavelife/git/scala-transfer-file/}scala-transfer-file...
[info] Resolving com.typesafe.akka#akka-actor;2.5.24 ...
[warn]  module not found: com.typesafe.akka#akka-actor;2.5.24
[warn] ==== local: tried
[warn]   /home/canmarshavelife/.ivy2/local/com.typesafe.akka/akka-actor/2.5.24/ivys/ivy.xml
[warn] ==== fedora: tried
[warn]   file:/usr/share/sbt/ivy-local/com.typesafe.akka/akka-actor/2.5.24/ivy.xml
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/com/typesafe/akka/akka-actor/2.5.24/akka-actor-2.5.24.pom
[warn] ==== sonatype-snapshots: tried
[warn]   https://oss.sonatype.org/content/repositories/snapshots/com/typesafe/akka/akka-actor/2.5.24/akka-actor-2.5.24.pom
[warn] ==== Typesafe Repository: tried
[warn]   http://repo.typesafe.com/typesafe/releases/com/typesafe/akka/akka-actor/2.5.24/akka-actor-2.5.24.pom
[info] Resolving org.sonatype.oss#oss-parent;9 ...
[info] downloading https://repo1.maven.org/maven2/org/scala-lang/scala-library/2.12.8/scala-library-2.12.8.jar ...
[info]  [SUCCESSFUL ] org.scala-lang#scala-library;2.12.8!scala-library.jar (8567ms)
[info] downloading https://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.12.8/scala-compiler-2.12.8.jar ...
[info]  [SUCCESSFUL ] org.scala-lang#scala-compiler;2.12.8!scala-compiler.jar (11382ms)
[info] downloading https://repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.12.8/scala-reflect-2.12.8.jar ...
[info]  [SUCCESSFUL ] org.scala-lang#scala-reflect;2.12.8!scala-reflect.jar (3136ms)
[info] downloading https://repo1.maven.org/maven2/org/scala-lang/modules/scala-xml_2.12/1.0.6/scala-xml_2.12-1.0.6.jar ...
[info]  [SUCCESSFUL ] org.scala-lang.modules#scala-xml_2.12;1.0.6!scala-xml_2.12.jar(bundle) (2030ms)
[info] downloading https://repo1.maven.org/maven2/jline/jline/2.14.6/jline-2.14.6.jar ...
[info]  [SUCCESSFUL ] jline#jline;2.14.6!jline.jar (1226ms)
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: com.typesafe.akka#akka-actor;2.5.24: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
sbt.ResolveException: unresolved dependency: com.typesafe.akka#akka-actor;2.5.24: not found
        at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:213)
        at sbt.IvyActions$$anonfun$update$1.apply(IvyActions.scala:122)
        at sbt.IvyActions$$anonfun$update$1.apply(IvyActions.scala:121)
        at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:116)
        at sbt.IvySbt$Module$$anonfun$withModule$1.apply(Ivy.scala:116)
        at sbt.IvySbt$$anonfun$withIvy$1.apply(Ivy.scala:104)
        at sbt.IvySbt.sbt$IvySbt$$action$1(Ivy.scala:51)
        at sbt.IvySbt$$anon$3.call(Ivy.scala:60)
        at xsbt.boot.Locks$GlobalLock.withChannel$1(Locks.scala:98)
        at xsbt.boot.Locks$GlobalLock.xsbt$boot$Locks$GlobalLock$$withChannelRetries$1(Locks.scala:81)
        at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:102)
        at xsbt.boot.Locks$GlobalLock$$anonfun$withFileLock$1.apply(Locks.scala:102)
        at xsbt.boot.Using$.withResource(Using.scala:11)
        at xsbt.boot.Using$.apply(Using.scala:10)
        at xsbt.boot.Locks$GlobalLock.withFileLock(Locks.scala:102)
        at xsbt.boot.Locks$GlobalLock.ignoringDeadlockAvoided(Locks.scala:62)
        at xsbt.boot.Locks$GlobalLock.withLock(Locks.scala:52)
        at xsbt.boot.Locks$.apply0(Locks.scala:38)
        at xsbt.boot.Locks$.apply(Locks.scala:28)
        at sbt.IvySbt.withDefaultLogger(Ivy.scala:60)
        at sbt.IvySbt.withIvy(Ivy.scala:101)
        at sbt.IvySbt.withIvy(Ivy.scala:97)
        at sbt.IvySbt$Module.withModule(Ivy.scala:116)
        at sbt.IvyActions$.update(IvyActions.scala:121)
        at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1161)
        at sbt.Classpaths$$anonfun$sbt$Classpaths$$work$1$1.apply(Defaults.scala:1159)
        at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$73.apply(Defaults.scala:1182)
        at sbt.Classpaths$$anonfun$doWork$1$1$$anonfun$73.apply(Defaults.scala:1180)
        at sbt.Tracked$$anonfun$lastOutput$1.apply(Tracked.scala:35)
        at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1184)
        at sbt.Classpaths$$anonfun$doWork$1$1.apply(Defaults.scala:1179)
        at sbt.Tracked$$anonfun$inputChanged$1.apply(Tracked.scala:45)
        at sbt.Classpaths$.cachedUpdate(Defaults.scala:1187)
        at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1152)
        at sbt.Classpaths$$anonfun$updateTask$1.apply(Defaults.scala:1130)
        at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
        at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)
        at sbt.std.Transform$$anon$4.work(System.scala:64)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
        at sbt.Execute.work(Execute.scala:244)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.Executors$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)
[error] (*:update) sbt.ResolveException: unresolved dependency: com.typesafe.akka#akka-actor;2.5.24: not found
[error] Total time: 39 s, completed 19/08/2019 15:24:08

我该怎么办？

【问题讨论】：

    标签： scala sbt akka


    【解决方案1】：

    改变

    libraryDependencies += "com.typesafe.akka" % "akka-actor" % "2.5.24"

    到

    libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.5.24"

    这显然是documented。 %% 导致 sbt 将 Scala 版本添加到工件名称 ("akka-actor")。

    【讨论】：

    • 你说得对，对不起我的疏忽。但它根本没有解决问题，现在我收到以下错误：pastebin.com/fXgRZ28u。请问你知道怎么解决吗？ Ps：现在显然我正在使用 sbt 1.2.8。
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