使用Akka / Akka Streams / Akka HTTP时冲突的Akka版本

时间:2017-08-29 13:27:38

标签: scala sbt akka akka-stream akka-http

我尝试使用Scala 2.12.3,sbt 0.13.6以及build.sbt文件中的以下库依赖项构建项目:

libraryDependencies ++= Seq(
  "com.typesafe.akka" %% "akka-actor" % "2.5.4",
  "com.typesafe.akka" %% "akka-stream" % "2.5.4",
  "com.typesafe.akka" %% "akka-stream-testkit" % "2.5.4" % Test,
  "com.typesafe.akka" %% "akka-http" % "10.0.9",
  "com.typesafe.akka" %% "akka-http-core" % "10.0.9",
  "org.scalatest" %% "scalatest" % "3.0.1" % Test)

但是,我一直收到有关版本冲突的以下警告......似乎akka-http对Akka / Streams版本2.4.19具有传递依赖性。我找到了一个类似的post,建议明确添加akka-streams作为依赖,并确保它与akka-actor的版本相同。以下是依赖警告:

[warn] Found version conflict(s) in library dependencies; some are 
suspected to be binary incompatible:
[warn] 
[warn]  * com.typesafe.akka:akka-stream_2.12:2.5.4 is selected over 
2.4.19
[warn]      +- com.typesafe.akka:akka-http-core_2.12:10.0.9       
(depends on 2.4.19)
[warn]      +- com.werner.opttech:dependency-test_2.12:0.0.0      
(depends on 2.4.19)
[warn] 
[warn]  * com.typesafe.akka:akka-actor_2.12:2.5.4 is selected over 
2.4.19
[warn]      +- com.werner.opttech:dependency-test_2.12:0.0.0      
(depends on 2.5.4)
[warn]      +- com.typesafe.akka:akka-stream_2.12:2.5.4           
(depends on 2.5.4)
[warn]      +- com.typesafe.akka:akka-parsing_2.12:10.0.9         
(depends on 2.4.19)

有关如何解决此错误的任何建议,以便我可以使用最新版本的akka​​,akka streams和akka http?谢谢!

3 个答案:

答案 0 :(得分:2)

您的配置正确,因为它遵循您提到的compatibility guidelines。我认为你将警告信息误解为错误;你 使用这些库的2.5.4版本。仔细看看这个片段:

[warn]  * com.typesafe.akka:akka-actor_2.12:2.5.4 is selected over 2.4.19

sbt确实在挑选akka-actor库的2.5.4版而不是版本2.4.19。

此外,在sbt控制台中运行show update会输出以下内容:

[info]  com.typesafe.akka:akka-actor_2.12
[info]          - 2.5.4
[info]                  status: release
[info]                  publicationDate: Thu Aug 10 09:17:00 EDT 2017
....
[info]          - 2.4.19
[info]                  evicted: true
[info]                  evictedData: latest-revision

sbt驱逐akka-actor的版本2.4.19,转而支持版本2.5.4。

警告消息实际上确认您正在使用当前版本的Akka工具。

答案 1 :(得分:1)

chunjef的回答是正确的。如果您确实要清除警告,请将以下代码添加到build.sbt。

conflictManager := ConflictManager.strict

dependencyOverrides += "com.typesafe.akka" %% "akka-actor" % "2.5.4"

dependencyOverrides += "com.typesafe.akka" %% "akka-stream" % "2.5.4"

dependencyOverrides += "org.scala-lang" % "scala-library" % "2.12.3"

答案 2 :(得分:1)

有点相关: akka-http 10.1.0-RC1 removes the transient dependency

  

我们更改了策略,不再明确依赖akka-stream,而是在构建中将其标记为provided依赖项。这意味着您必须始终向akka-stream添加手动依赖项。