I am using custom app loader.
play.application.loader="AppLoader"
I am getting java.lang.ClassNotFoundException: AppLoader error in my play application. The application was working fine earlier.
Stacktrace
! #78am4d92i - Internal server error, for (GET) [/] ->
play.api.PlayException: Cannot load play.application.loader[play.application.loader [AppLoader] was not loaded.]
at play.utils.Reflect$.loadClass$1(Reflect.scala:111)
at play.utils.Reflect$.configuredClass(Reflect.scala:124)
at play.api.ApplicationLoader$.apply(ApplicationLoader.scala:73)
at play.core.server.DevServerStart$$anon$1.$anonfun$reload$3(DevServerStart.scala:173)
at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
at play.core.server.DevServerStart$$anon$1.reload(DevServerStart.scala:171)
at play.core.server.DevServerStart$$anon$1.get(DevServerStart.scala:124)
at play.core.server.AkkaHttpServer.handleRequest(AkkaHttpServer.scala:189)
at play.core.server.AkkaHttpServer.$anonfun$createServerBinding$1(AkkaHttpServer.scala:106)
at akka.stream.impl.fusing.MapAsync$$anon$25.onPush(Ops.scala:1194)
Caused by: java.lang.ClassNotFoundException: AppLoader
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at play.utils.Reflect$.loadClass$1(Reflect.scala:105)
at play.utils.Reflect$.configuredClass(Reflect.scala:124)
at play.api.ApplicationLoader$.apply(ApplicationLoader.scala:73)
at play.core.server.DevServerStart$$anon$1.$anonfun$reload$3(DevServerStart.scala:173)
at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
at play.core.server.DevServerStart$$anon$1.reload(DevServerStart.scala:171)
at play.core.server.DevServerStart$$anon$1.get(DevServerStart.scala:124)
[error] application -
My issue was I was not referencing the class correctly. My previous code referenced the class in application.conf as play.application.loader="AppLoader". Later I moved AppLoader in a package app but I forgot to change the entry in application.conf. I had to change it to play.application.loader="app.AppLoader"
Related
I am getting a "Module cannot be instantiated error in a RateLimiter" in a newly created play project.
First I thought since it is a new project maybe some configuration is missing, so I checked build.sbt, plugins.sbt but they were fine.
I am not able to figure out what this error is regarding.
I am pasting entire stacktrace for you reference:
! #7gf2jmfmi - Internal server error, for (POST) [/testCreateUpdateCandidate] ->
play.api.PlayException: Cannot load module[Module [ratelimit.TasksModule] cannot be instantiated.]
at play.api.inject.Modules$.play$api$inject$Modules$$constructModule(Module.scala:147)
at play.api.inject.Modules$$anonfun$locate$1.apply(Module.scala:114)
at play.api.inject.Modules$$anonfun$locate$1.apply(Module.scala:113)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.immutable.HashSet$HashSet1.foreach(HashSet.scala:316)
at scala.collection.immutable.HashSet$HashTrieSet.foreach(HashSet.scala:972)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractSet.scala$collection$SetLike$$super$map(Set.scala:47)
at scala.collection.SetLike$class.map(SetLike.scala:92)
Caused by: java.lang.ClassNotFoundException: ratelimit.TasksModule
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at play.api.inject.Modules$$anonfun$locate$1$$anonfun$apply$1.apply(Module.scala:115)
at play.api.inject.Modules$$anonfun$locate$1$$anonfun$apply$1.apply(Module.scala:115)
at play.api.inject.Modules$.play$api$inject$Modules$$constructModule(Module.scala:121)
at play.api.inject.Modules$$anonfun$locate$1.apply(Module.scala:114)
at play.api.inject.Modules$$anonfun$locate$1.apply(Module.scala:113)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
I am working on a multi-sbt project, which has projects like invoices-and-orders, order-dtos.
We use internally made libraries in our organization.
The error appears at runtime after I hit any resource, I have researched a bit on how classLoader, etc work in loading classes at runtime in java, but I don't understand the root cause of this issue.
I would be thankful if someone could provide insights on this issue.
Full Stack Trace is as follows
play.api.UnexpectedException: Unexpected exception[NoClassDefFoundError: order/dtos/internal/DPQSRepresentations$DPQSStrategy]
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:184)
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:131)
at scala.Option.map(Option.scala:146)
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:131)
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:129)
at scala.util.Success.flatMap(Try.scala:231)
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:129)
at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:121)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
Caused by: java.lang.NoClassDefFoundError: order/dtos/internal/DPQSRepresentations$DPQSStrategy
at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3137)
at java.base/java.lang.Class.getDeclaredConstructors(Class.java:2357)
at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245)
at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:115)
at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:706)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:929)
at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:852)
at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:291)
at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:222)
Caused by: java.lang.ClassNotFoundException: order.dtos.internal.DPQSRepresentations$DPQSStrategy
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3137)
at java.base/java.lang.Class.getDeclaredConstructors(Class.java:2357)
at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245)
at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:115)
at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:706)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:929)
order/dtos/internal/DPQSRepresentations is the class object in order-dtos project
I use Intelij Idea. On project i use http://www.simplejavamail.org . After build and test run on server i got error:
Exception in thread "main" java.lang.NoClassDefFoundError:
org/slf4j/LoggerFactory
at org.simplejavamail.util.ConfigLoader.<clinit>(ConfigLoader.java:55)
at org.simplejavamail.email.EmailBuilder.<init>(EmailBuilder.java:153)
at com.company.Main.main(Main.java:186) Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 3 more
After googleing i add slf4j-simple-1.7.25.jar to libraries, but after build it cause that same error. It's strange because if i trying import it in any project file IDE suggest it. I also try add slf4j-api-1.7.25.jar, slf4j-jdk14-1.7.25.jar but it's stil doesnt't help.
Sorry if i don't write important informations. It's my first java project.
In my program I have several modules placed in different folders and all of them are dependent on a "core" module.
I have already setup a configuration for Intellij to run the program, but every time I try to run I receive a ClassNotFound Excpetion. I'm not sure if this is due to my core module having a similar packages i.e. com.adpetlabs.flappybird
Could the problem be related to the packages or something else? I really need help in resolving this
Stacktrace:
Exception in thread "main" java.lang.ClassNotFoundException: com.adeptlabs.flappybird.desktop.DesktopLauncher
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:122)
I have written a SOLR(4.10.3) plugin using netbeans. I have created jar by building the project.
My class name is SolrPostFilter (SolrPostFilter.jar file)
This is the complete path of this jar ~/solr-4.10/plugin/lib. plugin jar file lies in lib directory.
I have registered my plugin like this in solrconfig.xml
<queryParser name="ModuloPostFilter" class="SolrPostFilter"/>
Is this path correct ?
When I reload core, following error appears
org.apache.solr.common.SolrException: Error handling 'reload' action
at org.apache.solr.handler.admin.CoreAdminHandler.handleReloadAction(CoreAdminHandler.java:737)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:225)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.solr.common.SolrException: Unable to reload core [collection1]
at org.apache.solr.core.CoreContainer.reload(CoreContainer.java:591)
at org.apache.solr.handler.admin.CoreAdminHandler.handleReloadAction(CoreAdminHandler.java:735)
... 31 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'SolrPostFilter'
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:881)
at org.apache.solr.core.SolrCore.reload(SolrCore.java:437)
Caused by: org.apache.solr.common.SolrException: Error loading class 'SolrPostFilter'
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:490)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:421)
Caused by: java.lang.ClassNotFoundException: SolrPostFilter
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
Where is the problem. I think, its path is not set. How to do it?