Play framework 2.4：NoClassDefFoundError：play / api / cache / CachePlugin [英] Play framework 2.4: NoClassDefFoundError: play/api/cache/CachePlugin
本文介绍了Play framework 2.4：NoClassDefFoundError：play / api / cache / CachePlugin的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在尝试从Play 2.2更新到Play 2.4时，我遇到了这个绊脚石。
In trying to update from Play 2.2 to Play 2.4, I've hit this stumbling block.
我已经添加了memcached2插件但已禁用。
I've got the memcached2 plugin also added but disabled.
我的conf文件：
# Cache configuration
# ~~~~~
# To avoid conflict with play2-memcached's Memcached-based cache module
play.modules.disabled+="com.github.mumoshu.play2.memcached.MemcachedModule"
play.modules.enabled+="play.api.cache.EhCacheModule"
# Well-known configuration provided by Play
play.modules.cache.defaultCache=default
play.modules.cache.bindCaches=["db-cache", "user-cache", "session-cache"]
取自github页面上的示例： https://github.com/mumoshu/play2-memcached
Taken from the example on the github page: https://github.com/mumoshu/play2-memcached
我的build.sbt中的相关部分：
The relevant part in my build.sbt:
lazy val buildSettings = Seq(
scalaVersion := "2.10.5"
)
lazy val root = (project in file(".")).enablePlugins(PlayJava, PlayEbean, SbtTwirl)
.settings(buildSettings: _*)
libraryDependencies ++= Seq(
javaJdbc,
cache,
javaWs,
"net.spy" % "spymemcached" % "2.12.0",
"com.github.mumoshu" %% "play2-memcached-play24" % "0.7.0"
)
我得到以下stacktrace：
I'm getting the following stacktrace:
play.api.UnexpectedException: Unexpected exception[NoClassDefFoundError: play/api/cache/CachePlugin]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:169) ~[play-server_2.10-2.4.2.jar:2.4.2]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:121) ~[play-server_2.10-2.4.2.jar:2.4.2]
at scala.Option.map(Option.scala:145) ~[scala-library-2.10.5.jar:na]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:121) ~[play-server_2.10-2.4.2.jar:2.4.2]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:119) ~[play-server_2.10-2.4.2.jar:2.4.2]
at scala.util.Success.flatMap(Try.scala:200) ~[scala-library-2.10.5.jar:na]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:119) ~[play-server_2.10-2.4.2.jar:2.4.2]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:111) ~[play-server_2.10-2.4.2.jar:2.4.2]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) ~[na:1.8.0_60]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[na:1.8.0_60]
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) ~[na:1.8.0_60]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) ~[na:1.8.0_60]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) ~[na:1.8.0_60]
Caused by: java.lang.NoClassDefFoundError: play/api/cache/CachePlugin
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_60]
at java.lang.ClassLoader.defineClass(ClassLoader.java:760) ~[na:1.8.0_60]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_60]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_60]
at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_60]
at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_60]
at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_60]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_60]
at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:411) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:411) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_60]
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_60]
at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_60]
at play.utils.Reflect$.getClass(Reflect.scala:142) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins$$anonfun$loadPlugins$1.apply(Plugins.scala:88) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins$$anonfun$loadPlugins$1.apply(Plugins.scala:87) ~[play_2.10-2.4.2.jar:2.4.2]
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library-2.10.5.jar:na]
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library-2.10.5.jar:na]
at scala.collection.immutable.List.foreach(List.scala:318) ~[scala-library-2.10.5.jar:na]
at scala.collection.TraversableLike$class.map(TraversableLike.scala:244) ~[scala-library-2.10.5.jar:na]
at scala.collection.AbstractTraversable.map(Traversable.scala:105) ~[scala-library-2.10.5.jar:na]
at play.api.Plugins$.loadPlugins(Plugins.scala:87) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins$$anonfun$apply$4.apply(Plugins.scala:100) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins$$anonfun$apply$4.apply(Plugins.scala:100) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins.thePlugins$lzycompute(Plugins.scala:59) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins.thePlugins(Plugins.scala:59) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Plugins.length(Plugins.scala:60) ~[play_2.10-2.4.2.jar:2.4.2]
at scala.collection.IndexedSeqLike$class.iterator(IndexedSeqLike.scala:91) ~[scala-library-2.10.5.jar:na]
at play.api.Plugins.iterator(Plugins.scala:57) ~[play_2.10-2.4.2.jar:2.4.2]
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72) ~[scala-library-2.10.5.jar:na]
at play.api.Plugins.foreach(Plugins.scala:57) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Play$$anonfun$start$1.apply$mcV$sp(Play.scala:92) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Play$$anonfun$start$1.apply(Play.scala:87) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Play$$anonfun$start$1.apply(Play.scala:87) ~[play_2.10-2.4.2.jar:2.4.2]
at play.utils.Threads$.withContextClassLoader(Threads.scala:21) ~[play_2.10-2.4.2.jar:2.4.2]
at play.api.Play$.start(Play.scala:87) ~[play_2.10-2.4.2.jar:2.4.2]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:156) ~[play-server_2.10-2.4.2.jar:2.4.2]
... 14 common frames omitted
Caused by: java.lang.ClassNotFoundException: play.api.cache.CachePlugin
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_60]
... 53 common frames omitted
我很难过。我从来没有看到这个问题的起源。此外，它似乎是旧的播放依赖关系命令，提供了哪个其他依赖关系所需的jar版本的漂亮ASCII图表。当前的show allDependencies只是我在sbt文件中列出的依赖项列表。
And I'm stumped. At no point do I see where this problem originates. Also, it appears the old "play dependencies" command, providing that nice ASCII chart of what version of what jar was needed by which other dependency, is gone. The current "show allDependencies" is just a list of the things I have listed in my sbt file as dependencies.
编辑：
根据要求，在将所有依赖项更改为2.11.7后，以及build.sbt文件中的scalaVersion，我得到：
As requested, after changing all dependencies to 2.11.7, and the scalaVersion in the build.sbt file, I get this:
[error] Modules were resolved with conflicting cross-version suffixes in {file:/home/.../}...:
[error] com.typesafe.akka:akka-actor _2.10, _2.11
[error] com.typesafe.play:twirl-api _2.10, _2.11
java.lang.RuntimeException: Conflicting cross-version suffixes in: com.typesafe.akka:akka-actor, com.typesafe.play:twirl-api
at scala.sys.package$.error(package.scala:27)
at sbt.ConflictWarning$.processCrossVersioned(ConflictWarning.scala:46)
at sbt.ConflictWarning$.apply(ConflictWarning.scala:32)
at sbt.Classpaths$$anonfun$66.apply(Defaults.scala:1164)
at sbt.Classpaths$$anonfun$66.apply(Defaults.scala:1161)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:235)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
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:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[error] (*:update) Conflicting cross-version suffixes in: com.typesafe.akka:akka-actor, com.typesafe.play:twirl-api
EDIT2：
build.properties：
build.properties:
sbt.version=0.13.8
plugins.sbt：
plugins.sbt:
// Comment to get more information during initialization
logLevel := Level.Warn
// The Play plugin
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.4.2")
// The Typesafe repository
resolvers ++= Seq(
"Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/",
"Public SBT repo" at "http://dl.bintray.com/sbt/sbt-plugin-releases/",
"Local maven repo" at "file://"+Path.userHome.absolutePath+"/.m2/repository"
)
// The eclipse plugin
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")
// Play enhancer - this automatically generates getters/setters for public fields
// and rewrites accessors of these fields to use the getters/setters. Remove this
// plugin if you prefer not to have this feature, or disable on a per project
// basis using disablePlugins(PlayEnhancer) in your build.sbt
addSbtPlugin("com.typesafe.sbt" % "sbt-play-enhancer" % "1.1.0")
// Play Ebean support, to enable, uncomment this line, and enable in your build.sbt using
// enablePlugins(SbtEbean). Note, uncommenting this line will automatically bring in
// Play enhancer, regardless of whether the line above is commented out or not.
addSbtPlugin("com.typesafe.sbt" % "sbt-play-ebean" % "1.0.0")
build.sbt：
build.sbt:
lazy val buildSettings = Seq(
scalaVersion := "2.11.7"
)
lazy val root = (project in file(".")).enablePlugins(PlayJava, PlayEbean, SbtTwirl)
.settings(buildSettings: _*)
libraryDependencies ++= Seq(
javaJdbc,
cache,
javaWs,
"net.spy" % "spymemcached" % "2.12.0",
"com.github.mumoshu" %% "play2-memcached-play24" % "0.7.0",
"org.apache.commons" % "commons-collections4" % "4.0"
)
EDIT2：从build.sbt中删除SbtTwirl后的输出：
Output after removing SbtTwirl from build.sbt:
[error] Modules were resolved with conflicting cross-version suffixes in {file:/home/.../}...:
[error] com.typesafe.play:play-ws _2.11, _2.10
[error] com.typesafe.play:play-functional _2.11, _2.10
[error] com.typesafe.akka:akka-actor _2.11, _2.10
[error] com.typesafe.play:play-java-ws _2.11, _2.10
[error] com.typesafe.play:play-json _2.11, _2.10
[error] com.typesafe.play:play _2.11, _2.10
[error] com.typesafe.play:play-cache _2.11, _2.10
[error] com.typesafe.play:play-server _2.11, _2.10
[error] com.typesafe.play:play-java-jdbc _2.11, _2.10
[error] com.typesafe.play:play-iteratees _2.11, _2.10
[error] com.typesafe.play:twirl-api _2.11, _2.10
[error] com.typesafe.play:play-jdbc _2.11, _2.10
[error] com.typesafe.play:play-java _2.11, _2.10
[error] com.typesafe.play:play-netty-server _2.11, _2.10
[error] org.scala-lang.modules:scala-java8-compat _2.11, _2.10
[error] com.typesafe.akka:akka-slf4j _2.11, _2.10
[error] org.scala-stm:scala-stm _2.11, _2.10
[error] com.github.mumoshu:play2-memcached-play24 _2.11, _2.10
[error] com.typesafe.play:play-datacommons _2.11, _2.10
[error] com.typesafe.play:play-jdbc-api _2.11, _2.10
java.lang.RuntimeException: Conflicting cross-version suffixes in: com.typesafe.play:play-ws, com.typesafe.play:play-functional, com.typesafe.akka:akka-actor, com.typesafe.play:play-java-ws, com.typesafe.play:play-json, com.typesafe.play:play, com.typesafe.play:play-cache, com.typesafe.play:play-server, com.typesafe.play:play-java-jdbc, com.typesafe.play:play-iteratees, com.typesafe.play:twirl-api, com.typesafe.play:play-jdbc, com.typesafe.play:play-java, com.typesafe.play:play-netty-server, org.scala-lang.modules:scala-java8-compat, com.typesafe.akka:akka-slf4j, org.scala-stm:scala-stm, com.github.mumoshu:play2-memcached-play24, com.typesafe.play:play-datacommons, com.typesafe.play:play-jdbc-api
at scala.sys.package$.error(package.scala:27)
at sbt.ConflictWarning$.processCrossVersioned(ConflictWarning.scala:46)
at sbt.ConflictWarning$.apply(ConflictWarning.scala:32)
at sbt.Classpaths$$anonfun$66.apply(Defaults.scala:1164)
at sbt.Classpaths$$anonfun$66.apply(Defaults.scala:1161)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:235)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[error] (*:update) Conflicting cross-version suffixes in: com.typesafe.play:play-ws, com.typesafe.play:play-functional, com.typesafe.akka:akka-actor, com.typesafe.play:play-java-ws, com.typesafe.play:play-json, com.typesafe.play:play, com.typesafe.play:play-cache, com.typesafe.play:play-server, com.typesafe.play:play-java-jdbc, com.typesafe.play:play-iteratees, com.typesafe.play:twirl-api, com.typesafe.play:play-jdbc, com.typesafe.play:play-java, com.typesafe.play:play-netty-server, org.scala-lang.modules:scala-java8-compat, com.typesafe.akka:akka-slf4j, org.scala-stm:scala-stm, com.github.mumoshu:play2-memcached-play24, com.typesafe.play:play-datacommons, com.typesafe.play:play-jdbc-api
推荐答案
我认为你需要启用MemCachedModule和Disable EhCacheModule
I think you need to enable MemCachedModule and Disable EhCacheModule
play.modules.enabled+="com.github.mumoshu.play2.memcached.MemcachedModule"
play.modules.disabled+="play.api.cache.EhCacheModule"
Please审查配置@ https://github.com/mumoshu/play2-memcached
Please review configuration @ https://github.com/mumoshu/play2-memcached
另一个建议是：
Play在2.4中完全不同于2.2。
初始化已经完全改变，Guice DI进入它。
The Play works in 2.4 it totally different from 2.2. The initialization has been totally changed with Guice DI coming into it.
插件应该迁移到模块。
Play 2.4中没有CachePlugin类。*以后
There is no CachePlugin class from Play 2.4.* onwards
播放告诉：
注意：Scala 2.10并不完全支持所有Java 8语言功能，例如接口上的静态方法。如果您的项目使用Java 8中提供的这些新功能使用Java代码，请升级以使用Scala 2.11.6+。请参阅sbt docs以了解如何将scalaVersion设置为您的项目。
Note: Scala 2.10 does not have full support to all Java 8 language features, like static methods on interfaces. If your project has Java code using these new features present in Java 8, upgrade to use Scala 2.11.6+. See sbt docs to learn how to set scalaVersion to your project.
这篇关于Play framework 2.4：NoClassDefFoundError：play / api / cache / CachePlugin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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