问题
I am learning akka-remoting and this is how my project looks
The project structure looks like
project/pom.xml
project/mymodule/pom.xml
project/mymodule/src/main/resources/application.conf
project/mymodule/src/main/scala/com.harit.akkaio.remote.RemoteApp.scala
project/mymodule/src/main/scala/com.harit.akkaio.remote.ProcessingActor.scala
When I run my project on command-line
, I see
$ java -jar akkaio-remote/target/akka-remote-jar-with-dependencies.jar com.harit.akkaio.remote.RemoteApp
Hello:com.harit.akkaio.remote.RemoteApp
Exception in thread "main" com.typesafe.config.ConfigException$Missing: No configuration setting found for key 'akka.version'
at com.typesafe.config.impl.SimpleConfig.findKey(SimpleConfig.java:124)
at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:145)
at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:151)
at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:159)
at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:164)
at com.typesafe.config.impl.SimpleConfig.getString(SimpleConfig.java:206)
at akka.actor.ActorSystem$Settings.<init>(ActorSystem.scala:169)
at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:505)
at akka.actor.ActorSystem$.apply(ActorSystem.scala:142)
at akka.actor.ActorSystem$.apply(ActorSystem.scala:119)
at com.harit.akkaio.remote.RemoteApp$.startProcessingActorSystem(RemoteApp.scala:16)
at com.harit.akkaio.remote.RemoteApp$.main(RemoteApp.scala:12)
at com.harit.akkaio.remote.RemoteApp.main(RemoteApp.scala)
RemoteApp.scala
package com.harit.akkaio.remote
import akka.actor.{ActorRef, ActorSystem, Props}
import com.typesafe.config.ConfigFactory
import scala.concurrent.duration._
object RemoteApp {
def main(args: Array[String]): Unit = {
println("Hello:" + args.head)
startProcessingActorSystem()
}
def startProcessingActorSystem() = {
val system = ActorSystem("ProcessingSystem", ConfigFactory.load())
println("ProcessingActorSystem Started")
}
}
ProcessingActor.scala
package com.harit.akkaio.remote
import akka.actor.{Actor, ActorLogging}
case object Process
case object Crash
class ProcessingActor extends Actor with ActorLogging {
def receive = {
case Process => log.info("processing big things")
case Crash => log.info("crashing the system")
context.stop(self)
}
}
application.conf
akka {
remote.netty.tcp.port = 2552
}
mymodule.pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>akkaio</artifactId>
<groupId>com.harit</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>akkaio-remote</artifactId>
<properties>
<akka-remote_2.11.version>2.3.11</akka-remote_2.11.version>
</properties>
<dependencies>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-remote_2.11</artifactId>
<version>${akka-remote_2.11.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<finalName>akka-remote</finalName>
<archive>
<manifest>
<mainClass>com.harit.akkaio.remote.RemoteApp</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.harit</groupId>
<artifactId>akkaio</artifactId>
<version>1.0-SNAPSHOT</version>
<modules>
<module>akkaio-remote</module>
</modules>
<packaging>pom</packaging>
<inceptionYear>2015</inceptionYear>
<properties>
<scala.version>2.11.6</scala.version>
<junit.version>4.12</junit.version>
<scalatest_2.11.version>2.2.5</scalatest_2.11.version>
<akka-actor_2.11.version>2.3.11</akka-actor_2.11.version>
<akka-slf4j_2.11.version>2.3.11</akka-slf4j_2.11.version>
<akka-testkit_2.11.version>2.3.11</akka-testkit_2.11.version>
<mockito-all.version>1.10.19</mockito-all.version>
<maven-scala-plugin.scalaCompatVersion>2.11.6</maven-scala-plugin.scalaCompatVersion>
<scalatest-maven-plugin.version>1.0</scalatest-maven-plugin.version>
</properties>
<repositories>
<repository>
<id>scala-tools.org</id>
<name>Scala-Tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>scala-tools.org</id>
<name>Scala-Tools Maven2 Repository</name>
<url>http://scala-tools.org/repo-releases</url>
</pluginRepository>
</pluginRepositories>
<dependencies>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>${scala.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-actor_2.11</artifactId>
<version>${akka-actor_2.11.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-slf4j_2.11</artifactId>
<version>${akka-slf4j_2.11.version}</version>
</dependency>
<dependency>
<groupId>org.scalatest</groupId>
<artifactId>scalatest-maven-plugin</artifactId>
<version>${scalatest-maven-plugin.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-testkit_2.11</artifactId>
<version>${akka-testkit_2.11.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.scalatest</groupId>
<artifactId>scalatest_2.11</artifactId>
<version>${scalatest_2.11.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<defaultGoal>clean install</defaultGoal>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaCompatVersion>${maven-scala-plugin.scalaCompatVersion}</scalaCompatVersion>
<scalaVersion>${scala.version}</scalaVersion>
<scalaVersion>${scala.version}</scalaVersion>
<args>
<arg>-target:jvm-1.8</arg>
</args>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.7</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.scalatest</groupId>
<artifactId>scalatest-maven-plugin</artifactId>
<version>1.0</version>
<configuration>
<reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
<junitxml>.</junitxml>
<filereports>WDF TestSuite.txt</filereports>
</configuration>
<executions>
<execution>
<id>test</id>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
</configuration>
</plugin>
</plugins>
</reporting>
</project>
What am I missing out? Thanks
回答1:
It seems that your problem is bundling into a jar-with-dependencies
, which causes problems with Akka, as described in the documentation:
Warning
Akka's configuration approach relies heavily on the notion of every module/jar having its own reference.conf file, all of these will be discovered by the configuration and loaded. Unfortunately this also means that if you put/merge multiple jars into the same jar, you need to merge all the reference.confs as well. Otherwise all defaults will be lost and Akka will not function.
As suggested on the same page, you can use maven-shade-plugin
to merge all the reference configurations:
If you are using Maven to package your application, you can also make use of the Apache Maven Shade Plugin support for Resource Transformers to merge all the reference.confs on the build classpath into one.
See also: Akka: missing akka.version
回答2:
Had a similar issue:
com.typesafe.config.ConfigException$Missing:
No configuration setting found for key 'akka.persistence.journal-plugin-fallback'
Solved it with adding an appending transformer:
<plugin>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>reference.conf</resource>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
回答3:
Adding AppendingTransformer alone didn't resolve the issue for me. If you are trying to deploy your spark application on EMR and are still facing this issue then please take a look at my solution here. Hope it helps!
回答4:
I tried this plugin, it is great but leads to another error due to some signed jars. Here is the error:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.SecurityException: Invalid signature file digest for Manifest main attributes
What I would suggest you to use is the spring boot maven plugin. Just add it to your build and enjoy seamless runnable jars. This is one good reason why I love Spring framework.
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>final</classifier>
<mainClass>
com.main.PopularHashTags
</mainClass>
</configuration>
</execution>
</executions>
</plugin>
Note: You don't need to have a Spring Boot application to use this plugin. Just use it in any application and it works as a charm.
来源:https://stackoverflow.com/questions/31011243/no-configuration-setting-found-for-key-akka-version