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Failed to execute goal org.openjfx:javafx-maven-plugin [duplicate]

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What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 2 years ago.
I am trying to create a simple WorkbenchFX based project (Java 11) using Maven in the Eclipse IDE but I cannot get it to work because of the following error
[ERROR] Failed to execute goal org.openjfx:javafx-maven-plugin:0.0.4:run (default-cli) on project test_workbenchfx: Error: Command execution failed. Process exited with an error: 1 (Exit value: 1) -> [Help 1]
The entire console output is;
[INFO] Scanning for projects...
[INFO]
[INFO] --------------------< com.workfx:test_workbenchfx >---------------------
[INFO] Building test_workbenchfx 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) # test_workbenchfx ---
[INFO] Deleting C:\Users\JD\eclipse-workspace\test_workbenchfx\target
[INFO]
[INFO] >>> javafx-maven-plugin:0.0.4:run (default-cli) > process-classes # test_workbenchfx >>>
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # test_workbenchfx ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.0:compile (default-compile) # test_workbenchfx ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 3 source files to C:\Users\JD\eclipse-workspace\test_workbenchfx\target\classes
[INFO]
[INFO] <<< javafx-maven-plugin:0.0.4:run (default-cli) < process-classes # test_workbenchfx <<<
[INFO]
[INFO]
[INFO] --- javafx-maven-plugin:0.0.4:run (default-cli) # test_workbenchfx ---
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.NullPointerException
at java.base/java.util.Objects.requireNonNull(Objects.java:221)
at java.base/java.util.Arrays$ArrayList.<init>(Arrays.java:4323)
at java.base/java.util.Arrays.asList(Arrays.java:4310)
at javafx.base/javafx.collections.ObservableListBase.addAll(ObservableListBase.java:246)
at javafx.base/javafx.beans.binding.ListExpression.addAll(ListExpression.java:360)
at com.dlsc.workbenchfx.Workbench.initModules(Workbench.java:386)
at com.dlsc.workbenchfx.Workbench.<init>(Workbench.java:339)
at com.dlsc.workbenchfx.Workbench$WorkbenchBuilder.build(Workbench.java:311)
at com.workfx.test_workbenchfx.App.initWorkbench(App.java:76)
at com.workfx.test_workbenchfx.App.start(App.java:59)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Exception running application com.workfx.test_workbenchfx.App
[ERROR] Command execution failed.
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)
at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:404)
at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166)
at org.openjfx.JavaFXBaseMojo.executeCommandLine(JavaFXBaseMojo.java:504)
at org.openjfx.JavaFXBaseMojo.executeCommandLine(JavaFXBaseMojo.java:394)
at org.openjfx.JavaFXRunMojo.execute(JavaFXRunMojo.java:100)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:957)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:289)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:193)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)
at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:404)
at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:166)
at org.openjfx.JavaFXBaseMojo.executeCommandLine(JavaFXBaseMojo.java:504)
at org.openjfx.JavaFXBaseMojo.executeCommandLine(JavaFXBaseMojo.java:394)
at org.openjfx.JavaFXRunMojo.execute(JavaFXRunMojo.java:100)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:957)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:289)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:193)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 12.357 s
[INFO] Finished at: 2020-04-10T19:44:03+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.openjfx:javafx-maven-plugin:0.0.4:run (default-cli) on project test_workbenchfx: Error: Command execution failed. Process exited with an error: 1 (Exit value: 1) -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
I built the Maven project using the goal: clean javafx:run
This is my pom.xml file
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.workfx</groupId>
<artifactId>test_workbenchfx</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>11</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>11</version>
</dependency>
<dependency>
<groupId>com.dlsc.workbenchfx</groupId>
<artifactId>workbenchfx-core</artifactId>
<version>11.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>0.0.4</version>
<configuration>
<mainClass>com.workfx.test_workbenchfx.App</mainClass>
</configuration>
</plugin>
<!--
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2</version>
</plugin>
-->
<!--
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<executions>
<execution>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>com.workfx.test_workbenchfx.App</mainClass>
</configuration>
</plugin>
-->
</plugins>
</build>
</project>
The project's main class is
package com.workfx.test_workbenchfx;
import java.io.IOException;
import java.util.Locale;
import com.dlsc.workbenchfx.Workbench;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
/**
* JavaFX Workbench App
*/
public class App extends Application {
private Workbench wbench;
/**
* Application entry point
*
* #param args
*/
public static void main(String[] args) {
// See https://stackoverflow.com/questions/64038/setting-java-locale-settings
// https://stackoverflow.com/questions/24988491/difference-between-e-getmessage-and-e-getlocalizedmessage
Locale.setDefault(Locale.FRANCE);
launch(args);
}
#Override
public void start(Stage primaryStage) {
// preferences = new Preferences();
// Initialize the workbench
Scene myScene = new Scene(initWorkbench());
primaryStage.setScene(myScene);
primaryStage.setWidth(1300);
primaryStage.setHeight(730);
primaryStage.show();
primaryStage.centerOnScreen();
// initNightMode();
}
/**
*
* #return
*/
private Workbench initWorkbench() {
wbench = Workbench.builder(null).build();
return wbench;
}
}
I would really appreciate some help to get around this problem because nothing I've tried thus far (clean, update, rebuild) works.
Thanks a lot for your kind assistance.
JD

James_D Thanks a lot. It was so obvious after I read your comment. I passed null as a parameter into Workbench.builder() in the initWorkbench() method. Once I removed it and added a proper class, it worked.

Java8 maven raise Error reference to filter is ambiguous

I'm running a Spark quick start application:
/* SimpleApp.java */
import org.apache.spark.sql.SparkSession;
import org.apache.spark.sql.Dataset;
public class SimpleApp {
public static void main(String[] args) {
String logFile = "/data/software/spark-2.4.4-bin-without-hadoop/README.md"; // Should be some file on your system
SparkSession spark = SparkSession.builder().appName("Simple Application").getOrCreate();
Dataset<String> logData = spark.read().textFile(logFile).cache();
long numAs = logData.filter(s -> s.contains("a")).count();
long numBs = logData.filter(s -> s.contains("b")).count();
System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);
spark.stop();
}
}
As the official document told,
# Package a JAR containing your application
$ mvn package
When I ran mvn package it raise the below error:
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 1 source file to /home/dennis/java/spark_quick_start/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/dennis/java/spark_quick_start/src/main/java/SimpleApp.java:[11,25] reference to filter is ambiguous
both method filter(scala.Function1<T,java.lang.Object>) in org.apache.spark.sql.Dataset and method filter(org.apache.spark.api.java.function.FilterFunction<T>) in org.apache.spark.sql.Dataset match
[ERROR] /home/dennis/java/spark_quick_start/src/main/java/SimpleApp.java:[12,25] reference to filter is ambiguous
both method filter(scala.Function1<T,java.lang.Object>) in org.apache.spark.sql.Dataset and method filter(org.apache.spark.api.java.function.FilterFunction<T>) in org.apache.spark.sql.Dataset match
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:00 min
[INFO] Finished at: 2020-01-13T15:04:55+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project simple-project: Compilation failure: Compilation failure:
[ERROR] /home/dennis/java/spark_quick_start/src/main/java/SimpleApp.java:[11,25] reference to filter is ambiguous
[ERROR] both method filter(scala.Function1<T,java.lang.Object>) in org.apache.spark.sql.Dataset and method filter(org.apache.spark.api.java.function.FilterFunction<T>) in org.apache.spark.sql.Dataset match
[ERROR] /home/dennis/java/spark_quick_start/src/main/java/SimpleApp.java:[12,25] reference to filter is ambiguous
[ERROR] both method filter(scala.Function1<T,java.lang.Object>) in org.apache.spark.sql.Dataset and method filter(org.apache.spark.api.java.function.FilterFunction<T>) in org.apache.spark.sql.Dataset match
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
This is pom.xml:
<project>
<groupId>edu.berkeley</groupId>
<artifactId>simple-project</artifactId>
<modelVersion>4.0.0</modelVersion>
<name>Simple Project</name>
<packaging>jar</packaging>
<version>1.0</version>
<dependencies>
<dependency> <!-- Spark dependency -->
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.12</artifactId>
<version>2.4.4</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

It means that your lambda expression can both be turned into a scala.Function1<T,java.lang.Object>or a org.apache.spark.api.java.function.FilterFunction<T>.
I don't know if this would be ambiguous in Scala as well, but in Java it is. You need to explicitely state the type in this case:
long numAs = logData.filter((org.apache.spark.api.java.function.FilterFunction<String>)s -> s.contains("a")).count();
Or write the code in Scala.

It seems to be an compatible issue, as Spark 2.4.4 is using Scala 2.11 (I'm not sure). Because I saw this from the official website:
After changing to 2.11, all is working fine!
<dependency> <!-- Spark dependency -->
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.4.4</version>
<scope>provided</scope>
</dependency>

You can convert lambda expression to anonymous class creation as shown in below example:
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.SparkSession;
import scala.Function1;
public class SimpleApp {
public static void main(String[] args) {
String logFile = "/data/software/spark-2.4.4-bin-without-hadoop/README.md"; // Should be some file on your system
SparkSession spark = SparkSession.builder().appName("Simple Application").getOrCreate();
Dataset<String> logData = spark.read().textFile(logFile).cache();
long numAs = logData.filter(new Function1<String, Object>() {
public Object apply(String s) {
return s.contains("a");
}
}).count();
long numBs = logData.filter(new Function1<String, Object>() {
public Object apply(String s) {
return s.contains("b");
}
}).count();
System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);
spark.stop();
}
}

Maven Compilation Failure but no errors found

I'm running a maven build in Java 8, using compatibility target Java 6. When I try to build with Maven in Eclipse (just this project mind you, all other projects in my workspace build just fine), I get a compilation failure from maven, but maven doesn't list any actual errors except a generic MojoFailureException. When I compile through eclipse itself (using ANT or straight Java, there are no compilation errors). Also when I build on a remote machine using Jenkins and the same source code, there also are no problems using maven. It's definitely a local problem and I can't quite figure it out.
[INFO] --- maven-compiler-plugin:3.7.0:compile (default-compile) #
DataAdapterFB1 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 58 source files to C:\Users\user\Desktop\GitRepo\FB1DataAdapter\code\target\classes
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.460 s
[INFO] Finished at: 2018-07-18T08:20:37-04:00
[INFO] Final Memory: 11M/489M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project DataAdapterFB1: Compilation failure -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project DataAdapterFB1: Compilation failure
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.compiler.CompilationFailureException: Compilation failure
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:1165)
at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:168)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
... 20 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Relevant compiler plugin configuration:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
<executable>${JAVA_6_HOME}\bin\javac.exe</executable>
<compilerArguments>
<bootclasspath>${JAVA_6_HOME}\jre\lib\rt.jar</bootclasspath>
</compilerArguments>
<fork>true</fork>
</configuration>
</plugin>

I have the same problem with using JDK 11 to build a Maven project that targets Java 7. Try removing <fork>true</fork> (or set it to false instead), and that should fix it. (h/t to https://stackoverflow.com/a/39657410/278800)
I don't actually know what the root cause is, though. My guess is that some part of the java environment isn't being passed to the forked compile process, like e.g. JAVA_HOME. Or maybe it's because I'm using jenv to set my java version, and that doesn't work with the forked process.

I was working on a legacy project and I came across the same issue. Steve K's answer shed some light for me as well.
Here is the maven-compiler-plugin section in my project's pom.xml
I'm using IntelliJ IDEA with built in maven and JDK8 in a Windows environment.
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<showDeprecation>true</showDeprecation>
<showWarnings>true</showWarnings>
<executable>${jdk.home}/bin/javac</executable>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
I'm able to get the compiler running by making the value of <fork>true</fork> to false.
The reasoning behind
If the flag is false, Maven will use the same JVM process that brought up its process to do the compilation, which is fine for me as I am using Java 8 to bootstrap my Maven process.
If the flag is true, maven will try to fork (create) a new JVM process to do the job, and it will use the javac compiler defined in the <executable> section to do so. In my case, there is a ${jdk.home} variable that needs to be injected before running the Maven build. Clearly someone in our team forgot to tell the new joiner regarding for this setup.
There is some performance penalty of making the <fork> flag false though, so the ideal way is to leave it true but make sure the path in <executable> is valid.
https://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html#fork

Compilation error for annotations in Java using maven-compiler-plugin 2.5.1 with java 1.8 and netbeans

I'm newborn in writing anotations in Java. I was trying to write my own following this tutorial: Playing with Java annotation processing
I wrote everything like it is there, but during compilation I'm getting an error:
Bad service configuration file javax.annotation.processing.Processor Provider <my class> not found.
I'm using netbeans and maven with plugin maven-compiler-plugin v. 2.5.1. and java sources v.1.8.
In my pom.xml file I have (like suggested in page) following code:
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<!-- Disable annotation processing for ourselves. -->
<compilerArgument>-proc:none</compilerArgument>
</configuration>
</plugin>
My OS is Linux (leatest ubuntu) and maven is that one integrated in Netbeans.
I was trying to google it, but nothing helped me. All tutorials were for older release of plugin and Java. I tried older release of maven-compiler-plugin but with no effect. I cannot switch to older version of java because of new features introduced in Java 8.
Thanks a lot for any pointing me how to fix it.
Edit:
Here is full list of my sources:
Config.java
#Retention(RetentionPolicy.SOURCE)
#Target(value = {ElementType.FIELD, ElementType.LOCAL_VARIABLE, ElementType.PARAMETER})
public #interface Config {
String name();
String type();
String defaultValue();
}
ConfigAnnotationProcessor.java
#SupportedAnnotationTypes(
{"sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotations"}
)
public class ConfigAnnotationProcessor extends AbstractProcessor {
#Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment env) {
Messager messager = processingEnv.getMessager();
annotations.stream().forEach((te) -> {
env.getElementsAnnotatedWith(te).stream().forEach((e) -> {
messager.printMessage(Diagnostic.Kind.NOTE,
"Printing: " + e.toString());
});
});
return true;
}
#Override
public SourceVersion getSupportedSourceVersion() {
return SourceVersion.latestSupported();
}
}
META-INF/services/javax.annotation.processing.Processor
sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor
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>sk.lieskove301.jianghongtiao</groupId>
<artifactId>MotionAnalyser</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
.... some dependencies ...
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<profiles>
<profile>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<!-- Disable annotation processing for ourselves.-->
<compilerArgument>-proc:none</compilerArgument>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
And this is log of my compiler:
cd /home/xjuraj/Dropbox/Work/MotionAnalyser; JAVA_HOME=/usr/lib/jvm/java-8-oracle /usr/local/netbeans-8.0/java/maven/bin/mvn clean install
Scanning for projects...
------------------------------------------------------------------------
Building MotionAnalyser 1.0-SNAPSHOT
------------------------------------------------------------------------
--- maven-clean-plugin:2.4.1:clean (default-clean) # MotionAnalyser ---
Deleting /home/xjuraj/Dropbox/Work/MotionAnalyser/target
--- maven-resources-plugin:2.5:resources (default-resources) # MotionAnalyser ---
[debug] execute contextualize
Using 'UTF-8' encoding to copy filtered resources.
Copying 6 resources
--- maven-compiler-plugin:2.3.2:compile (default-compile) # MotionAnalyser ---
Compiling 27 source files to /home/xjuraj/Dropbox/Work/MotionAnalyser/target/classes
-------------------------------------------------------------
COMPILATION ERROR :
-------------------------------------------------------------
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
1 error
-------------------------------------------------------------
------------------------------------------------------------------------
BUILD FAILURE
------------------------------------------------------------------------
Total time: 1.661s
Finished at: Mon Aug 11 19:56:16 CEST 2014
Final Memory: 12M/180M
------------------------------------------------------------------------
Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project MotionAnalyser: Compilation failure
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
-> [Help 1]
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.
For more information about the errors and possible solutions, please read the following articles:
[Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Edit 2 and so on...:
Screenshot of my environment is here
Screenshot of my folder structure
Output of non-integrated maven
xjuraj#xjuraj-pc:~/Dropbox/Work/MotionAnalyser$ mvn -e package
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Unnamed - sk.lieskove301.jianghongtiao:MotionAnalyser:jar:1.0-SNAPSHOT
[INFO] task-segment: [package]
[INFO] ------------------------------------------------------------------------
[INFO] [resources:resources {execution: default-resources}]
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 6 resources
[INFO] [compiler:compile {execution: default-compile}]
[INFO] Compiling 27 source files to /home/xjuraj/Dropbox/Work/MotionAnalyser/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Compilation failure
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.BuildFailureException: Compilation failure
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:715)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider sk.lieskove301.jianghongtiao.motionanalyser.config.ConfigAnnotationProcessor not found
at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:729)
at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:128)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Thu Aug 14 15:10:26 CEST 2014
[INFO] Final Memory: 19M/187M
[INFO] ------------------------------------------------------------------------
Cheers,
juraj

Thanks a lot bigdestroyer for your time and help. I already found where the bug was. It was in pom.xml file. My structure was:
<project>
[...]
<dependencies>.... some dependencies ...</dependencies>
<properties>.... some properties ...</properties>
<profiles>
<profile>
<build>
<plugins>
<plugin>
... plugins & settings ...
But there were problem with tags <profiles> and <profile>. I removed them and it works like a charm now.
So my working pom.xml now looks like:
<?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>sk.lieskove301.jianghongtiao</groupId>
<artifactId>MotionAnalyser</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
...dependencies...
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<!-- Disable annotation processing for ourselves.-->
<compilerArgument>-proc:none</compilerArgument>
</configuration>
</plugin>
</plugins>
</build>
</project>

The problem seems to be in this instruction:
<compilerArgument>-proc:none</compilerArgument>
OP's answer has that line in Maven configuration, but he doesn't mention its importance.
I, too, tried to write an annotation processor and compile it with Maven. Addinng the line did the trick.

java Unit testing

I have an akka maven project and I want to run unit test it.
I have defined the test class but when I run it I have an error displayed.
the actor class code snippet is given below :
public class WorkerActor extends UntypedActor {
#Override
public void onReceive(Object msg) throws Exception {
if(msg instanceof GesturePoints)
{ GesturePoints message = (GesturePoints) msg;
Result rslt = initial_Theta(message);
getSender().tell(rslt);
}
else {unhandled(msg);}
}
public Result initial_Theta(GesturePoints p)
{
Result result = new Result();
if(p.getPoints().get("x").size() < 3) //The number of x coordinates as size
{ return null;}
dx = (double) ((Integer)p.getPoints().get("x").get(2) - (Integer)p.getPoints().get("x").get(0)) ;
dy = ((Double)p.getPoints().get("y").get(2)) - ((Double)p.getPoints().get("y").get(0));
{
result.setResult("feature1", initial_cos);
result.setResult("feature2", initial_sin);
}
return result;
}
}
the test class is given in the code below
public class ActorTest {
TestKit testKit;
TestActorRef<WorkerActor> testedActor ;
TestProbe tProbe;
#Before
public void setUp()
{
testKit = new TestKit(ActorSystem.apply());
tProbe = TestProbe.apply(testKit.system());
testedActor = TestActorRef.apply(new Props(new UntypedActorFactory()
{
public WorkerActor create()
{
return new WorkerActor();
}
}),testKit.system());
}
#Test
public void testWorkerActor()
{
ArrayList<Object> x = new ArrayList<Object>();
ArrayList<Object> y = new ArrayList<Object>();
x.add(0, 1); x.add(1, 2); x.add(2, 3); x.add(3, 4); x.add(4, 5);
y.add(0, 1.00); y.add(1, 2.00); y.add(2, 3.00); y.add(3, 4.00); y.add(4, 5.00);
Map<String, ArrayList<Object>> map = new HashMap<String, ArrayList<Object>>();
map.put("x", x);
map.put("y", y);
GesturePoints gp = new GesturePoints();
gp.setPoints(map);
tProbe = TestProbe.apply(testKit.system());
testedActor.tell(gp , tProbe.ref());
TestActor.Message message = tProbe.lastMessage();
Result result = (Result)message;
assertEquals(0.25 , result.getResult().get("x"));
assertEquals(0.25 , result.getResult().get("y"));
}
}
the maven also contain a default test class. Both the efault testclass and the Actortest class are located in the src/test/java folder.
this is the pom file
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.theta.gesture</groupId>
<artifactId>com-theta-gesture</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>com-theta-gesture</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>Com.RubineEngine.GesturePoints</groupId>
<artifactId>Com-RubineEngine-GesturePoints</artifactId>
<version>1.0-SANPSHOT</version>
</dependency>
<dependency>
<groupId>com.result.gesture</groupId>
<artifactId>com-result-gesture</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-actor</artifactId>
<version>2.0.2</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-remote</artifactId>
<version>2.0.2</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-slf4j</artifactId>
<version>2.0.2</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-testkit</artifactId>
<version>2.0.2</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-kernel</artifactId>
<version>2.0.2</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>typesafe</id>
<name>Typesafe Repository</name>
<url>http://repo.typesafe.com/typesafe/releases/</url>
</repository>
<repository>
<id>repo</id>
<name>repo</name>
<snapshots>
<enabled>true</enabled>
</snapshots>
<url>file://${project.basedir}/repo</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.12.4</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>2.12.4</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
the error message is given below
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building com-theta-gesture 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.4.3:resources (default-resources) # com-theta-gesture ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) # com-theta-gesture ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.4.3:testResources (default-testResources) # com-theta-gesture ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\Users\FAISAL\Desktop\disaster\com-theta-gesture\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:testCompile (default-testCompile) # com-theta-gesture ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) # com-theta-gesture ---
[WARNING] The POM for org.apache.maven:maven-plugin-api:jar:2.0.9 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven:maven-artifact:jar:2.0.9 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven:maven-project:jar:2.0.9 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven:maven-core:jar:2.0.9 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven:maven-toolchain:jar:2.0.9 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO] Surefire report directory: C:\Users\FAISAL\Desktop\disaster\com-theta-gesture\target\surefire-reports
[INFO] Using configured provider org.apache.maven.surefire.junitcore.JUnitCoreProvider
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Concurrency config is parallel='none', perCoreThreadCount=true, threadCount=2, useUnlimitedThreads=false
Running com.theta.gesture.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.011 sec
Running com.theta.gesture.ActorTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.562 sec <<< FAILURE!
testWorkerActor(com.theta.gesture.ActorTest) Time elapsed: 0.002 sec <<< ERROR!
java.lang.ClassCastException: akka.testkit.TestActor$NullMessage$ cannot be cast to com.result.gesture.Result
at com.theta.gesture.ActorTest.testWorkerActor(ActorTest.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:62)
at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:139)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Results :
Tests in error:
testWorkerActor(com.theta.gesture.ActorTest): akka.testkit.TestActor$NullMessage$ cannot be cast to com.result.gesture.Result
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.098s
[INFO] Finished at: Tue Oct 23 05:24:12 BST 2012
[INFO] Final Memory: 16M/106M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project com-theta-gesture: There are test failures.
[ERROR]
[ERROR] Please refer to C:\Users\FAISAL\Desktop\disaster\com-theta-gesture\target\surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Do I have to add any configuration to the application.conf file
hope somebody will help me out.

In your ActorTest, try replacing
TestActor.Message message = tProbe.lastMessage();
Result result = (Result)message;
With this:
tProbe.expectMsgClass(Result.class);
//TestActor.Message message = tProbe.lastMessage();
//Result result = (Result) message.msg(); <- Important
Then change WorkerActor to this:
if(msg instanceof GesturePoints) {
GesturePoints message = (GesturePoints) msg;
//Result rslt = initial_Theta(message);
//getSender().tell(rslt);
getSender().tell(new Result());
}
That should pass. This verifies that WorkerActor is sending back the right type of message (e.g. a Result).
The next step is to uncomment your call to initial_Theta() and figure out why that is not populating the Result correctly.