com.typesafe.config.ConfigException$Missing: system properties: No configuration setting found for key 'akka'

Akka Actors
1

Hi, I am trying to run Akka in Gluon (https://gluonhq.com/) platform as a native image. Compilation works fine and I am getting the following runtime exception,


Exception in thread "JavaFX Application Thread" com.typesafe.config.ConfigException$Missing: system properties: No configuration setting found for key 'akka'
	at com.typesafe.config.impl.SimpleConfig.findKeyOrNull(SimpleConfig.java:156)
	at com.typesafe.config.impl.SimpleConfig.findKey(SimpleConfig.java:149)
	at com.typesafe.config.impl.SimpleConfig.findOrNull(SimpleConfig.java:176)
	at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:188)
	at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:193)
	at com.typesafe.config.impl.SimpleConfig.getList(SimpleConfig.java:262)
	at com.typesafe.config.impl.SimpleConfig.getHomogeneousUnwrappedList(SimpleConfig.java:348)
	at com.typesafe.config.impl.SimpleConfig.getStringList(SimpleConfig.java:406)
	at akka.actor.ActorSystem$Settings$.amendSlf4jConfig(ActorSystem.scala:336)
	at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:817)
	at akka.actor.typed.ActorSystem$.createInternal(ActorSystem.scala:289)
	at akka.actor.typed.ActorSystem$.apply(ActorSystem.scala:198)
	at akka.actor.typed.ActorSystem$.create(ActorSystem.scala:235)
	at akka.actor.typed.ActorSystem.create(ActorSystem.scala)
	at com.mycompany.sample.Main.lambda$1(Main.java:39)
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
	at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
	at javafx.event.Event.fireEvent(Event.java:198)
	at javafx.scene.Node.fireEvent(Node.java:8889)
	at javafx.scene.control.Button.fire(Button.java:203)
	at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:208)
	at com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
	at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
	at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
	at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
	at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
	at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
	at javafx.event.Event.fireEvent(Event.java:198)
	at javafx.scene.Scene$MouseHandler.process(Scene.java:3856)
	at javafx.scene.Scene.processMouseEvent(Scene.java:1851)
	at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2584)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:409)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:299)
	at java.security.AccessController.doPrivileged(AccessController.java:102)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:447)
	at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:412)
	at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:446)
	at com.sun.glass.ui.View.handleMouseEvent(View.java:556)
	at com.sun.glass.ui.View.notifyMouse(View.java:942)
	at com.sun.glass.ui.mac.MacView.notifyMouse(MacView.java:127)
	at com.oracle.svm.jni.JNIJavaCallWrappers.jniInvoke_VARARGS:Lcom_sun_glass_ui_View_2_0002enotifyMouse_00028IIIIIIIZZ_00029V(JNIJavaCallWrappers.java:0)

I have added maven-shade-plugin as suggested here, Configuration • Akka Documentation
but no luck, still getting the above runtime exception.

Also note, the application is running in Gluon emulator but throwing above runtime exception when running as native image in any platforms.

My pom.xml,

<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://maven.apache.org/POM/4.0.0" 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.mycompany</groupId>
    <artifactId>myapplication</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>My Gluon Application</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.release>11</maven.compiler.release>
        <javafx.version>15.0.1</javafx.version>
        <javafx.plugin.version>0.0.5</javafx.plugin.version>
        <client.plugin.version>0.1.35</client.plugin.version>
        <charm.version>6.0.6</charm.version>
        <attach.version>4.0.10</attach.version>
        <main.class>com.mycompany.sample.Main</main.class>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-base</artifactId>
            <version>${javafx.version}</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-graphics</artifactId>
            <version>${javafx.version}</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>${javafx.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq</groupId>
            <artifactId>charm-glisten</artifactId>
            <version>${charm.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>display</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>lifecycle</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>local-notifications</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>settings</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>statusbar</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>storage</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>vibration</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <dependency>
            <groupId>com.gluonhq.attach</groupId>
            <artifactId>util</artifactId>
            <version>${attach.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor-typed -->
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor-typed_2.12</artifactId>
            <version>2.6.11</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor -->
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor_2.12</artifactId>
            <version>2.6.11</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-slf4j_2.12</artifactId>
            <version>2.6.11</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.30</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.30</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>${javafx.plugin.version}</version>
                <configuration>
                    <mainClass>${main.class}</mainClass>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.gluonhq</groupId>
                <artifactId>client-maven-plugin</artifactId>
                <version>${client.plugin.version}</version>
                <configuration>
                    <target>${client.target}</target>
                    <mainClass>${main.class}</mainClass>
                    <attachList>
                        <list>display</list>
                        <list>lifecycle</list>
                        <list>local-notifications</list>
                        <list>settings</list>
                        <list>statusbar</list>
                        <list>storage</list>
                        <list>vibration</list>
                    </attachList>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <shadedArtifactAttached>true</shadedArtifactAttached>
                            <shadedClassifierName>allinone</shadedClassifierName>
                            <artifactSet>
                                <includes>
                                    <include>*:*</include>
                                </includes>
                            </artifactSet>
                            <transformers>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>reference.conf</resource>
                                </transformer>
                                <!-- <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                    <manifestEntries>
                        <Main-Class>akka.Main</Main-Class>
                    </manifestEntries>
                    </transformer> -->
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <id>desktop</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <client.target>host</client.target>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>com.gluonhq.attach</groupId>
                    <artifactId>display</artifactId>
                    <version>${attach.version}</version>
                    <classifier>desktop</classifier>
                    <scope>runtime</scope>
                </dependency>
                <dependency>
                    <groupId>com.gluonhq.attach</groupId>
                    <artifactId>lifecycle</artifactId>
                    <version>${attach.version}</version>
                    <classifier>desktop</classifier>
                    <scope>runtime</scope>
                </dependency>
                <dependency>
                    <groupId>com.gluonhq.attach</groupId>
                    <artifactId>settings</artifactId>
                    <version>${attach.version}</version>
                    <classifier>desktop</classifier>
                    <scope>runtime</scope>
                </dependency>
                <dependency>
                    <groupId>com.gluonhq.attach</groupId>
                    <artifactId>storage</artifactId>
                    <version>${attach.version}</version>
                    <classifier>desktop</classifier>
                    <scope>runtime</scope>
                </dependency>
            </dependencies>
        </profile>
        <profile>
            <id>android</id>
            <properties>
                <client.target>android</client.target>
            </properties>
        </profile>
        <profile>
            <id>ios</id>
            <properties>
                <client.target>ios</client.target>
            </properties>
        </profile>
    </profiles>

    <repositories>
        <repository>
            <id>gluon-releases</id>
            <url>https://nexus.gluonhq.com/nexus/content/repositories/releases/</url>
        </repository>
    </repositories>
</project>

Thanks in advance!

2

I am not familiar with any of those technologies but my suspicion would be that there’s no reference.conf or application.conf files in the resulting binary (or they are in the wrong location).
As a consequence, when loading the Configuration, the resulting object hasn’t read any setting from reference.conf or application.conf so the resulting Config object is either empty or, at least, is missing entries under the akka namespaces.

Review the settings on your shading plugin and the native image complier to make sure those resources (refecence.conf and applciaiton.conf) are not discarded.

PS: it’s a common pitfall, when shading dependencies or creating an uberjar, that reference.conf files from multiple dependencies overwrite each other. You should make sure that all reference.conf resources on your classpath are merge when creating the uber-jar.

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