Error while using maven site plugin (AbstractMethodError) - java

When trying to do a mvn site:run with this project:
<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.example</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>test</name>
<description>test</description>
<reporting>
<plugins>
<!-- Project Reports -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.7</version>
</plugin>
<!-- Change report -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>changes-maven-plugin</artifactId>
<version>2.0-beta-1</version>
</plugin>
</plugins>
</reporting>
I get the following error:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-site-plugin:3.0:run (default-cli) # test ---
2013-08-21 12:44:07.381:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
[INFO] configuring report plugin org.apache.maven.plugins:maven-project-info-reports-plugin:2.7
[INFO] configuring report plugin org.codehaus.mojo:changes-maven-plugin:2.0-beta-1
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.477s
[INFO] Finished at: Wed Aug 21 12:44:08 CEST 2013
[INFO] Final Memory: 16M/179M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.0:run (default-cli) on project test: Execution default-cli of goal org.apache.maven.plugins:maven-site-plugin:3.0:run failed: An API incompatibility was encountered while executing org.apache.maven.plugins:maven-site-plugin:3.0:run: java.lang.AbstractMethodError: null
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.apache.maven.plugins:maven-site-plugin:3.0
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/user/.m2/repository/org/apache/maven/plugins/maven-site-plugin/3.0/maven-site-plugin-3.0.jar
[ERROR] urls[1] = file:/home/user/.m2/repository/org/apache/maven/reporting/maven-reporting-exec/1.0.1/maven-reporting-exec-1.0.1.jar
[ERROR] urls[2] = file:/home/user/.m2/repository/org/apache/maven/reporting/maven-reporting-api/3.0/maven-reporting-api-3.0.jar
...
[ERROR] urls[39] = file:/home/user/.m2/repository/commons-lang/commons-lang/2.5/commons-lang-2.5.jar
[ERROR] urls[40] = file:/home/user/.m2/repository/commons-io/commons-io/1.4/commons-io-1.4.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[maven.api, parent: null]]
[ERROR]
[ERROR] -----------------------------------------------------
[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/PluginContainerException
2013-08-21 12:44:08.256:INFO::Shutdown hook executing
2013-08-21 12:44:08.257:INFO::Shutdown hook complete
The error happens only after I add the changes-maven-plugin regardless of whether there is anything in src/changes/ or not. Up until now, I wasn't able to figure out what exactly the problem is. Can someone explain what I'm doing wrong here?


I think you want to use the maven-changes-plugin instead.

Related

How can i resolve my build error about maven?

I've tried to build a project with Maven. In the folder where there's pom.xml file I've launched git bash and used "mvn compile" command but I got a build failure with following message:
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] error: Source option 5 is no longer supported. Use 6 or later.
[ERROR] error: Target option 1.5 is no longer supported. Use 1.6 or later.
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 46.905 s
[INFO] Finished at: 2019-11-12T10:21:58+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project unitime: Compilation failure: Compilation failure:
[ERROR] error: Source option 5 is no longer supported. Use 6 or later.
[ERROR] error: Target option 1.5 is no longer supported. Use 1.6 or later.
[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

Add a configuration section to your maven-compiler-plugin in your pom.xml file and set source and target to eg. 1.8.
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>

maven-surefire-plugin:2.18.1:test failed

I'm studying "Cloud-Native Applications in Java" and I'm doing the exercise in this book. This is my pom.xml:
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
</parent>
<groupId>com.mycompany.petstore</groupId>
<artifactId>product</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
I set up the settings of Maven on a specific path: C:\Users\Sam.m2\settings.xml
The only information that I set up on my settings.xml is the following:
...
<proxies>
<proxy>
<id>myproxy</id>
<active>true</active>
<protocol>http</protocol>
<host>localhost:8080</host>
<nonProxyHosts>localhost,127.0.0.1</nonProxyHosts>
<port>8080</port>
</proxy>
</proxies>
When I try to run this program (a simple program with three java classes), in my console there is:
--- maven-surefire-plugin:2.18.1:test (default-test) # product ---
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/maven-surefire-common/2.18.1/maven-surefire-common-2.18.1.pom
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-api/2.18.1/surefire-api-2.18.1.pom
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-toolchain/2.2.1/maven-toolchain-2.2.1.pom
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugin-tools/maven-plugin-annotations/3.3/maven-plugin-annotations-3.3.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.873 s
[INFO] Finished at: 2019-07-21T15:32:13+02:00
[INFO] Final Memory: 18M/224M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test (default-test) on project product: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.18.1:test failed: Plugin org.apache.maven.plugins:maven-surefire-plugin:2.18.1 or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.maven.plugins:maven-surefire-plugin:jar:2.18.1 -> org.apache.maven.surefire:maven-surefire-common:jar:2.18.1: Failed to read artifact descriptor for org.apache.maven.surefire:maven-surefire-common:jar:2.18.1: Could not transfer artifact org.apache.maven.surefire:maven-surefire-common:pom:2.18.1 from/to central (https://repo.maven.apache.org/maven2): localhost:8080 -> [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/PluginResolutionException
How can I solve the problem?

Maven cannot find dependency in local repository [duplicate]

This question already has answers here:
Maven project cannot locate dependencies in local repository
(4 answers)
Closed 6 years ago.
It seems very simple so I must have some problem with configuration.
There is a demo project with pom:
<?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.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This project build and installs correctly in my .m2
Then I have another project, with pom:
<?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.example</groupId>
<artifactId>demo2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo2</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
When trying to access a class from demo, I get:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building demo2 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.6.1:clean (default-clean) # demo2 ---
[INFO] Deleting /home/lukasz/parent/demo2/target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # demo2 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) # demo2 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /home/lukasz/parent/demo2/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
symbol: class Aclass
location: class com.example.Demo2Application
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
symbol: class Aclass
location: class com.example.Demo2Application
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.096 s
[INFO] Finished at: 2017-02-19T01:11:21+01:00
[INFO] Final Memory: 21M/203M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: Compilation failure: Compilation failure:
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
[ERROR] symbol: class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] /home/lukasz/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
[ERROR] symbol: class Aclass
[ERROR] location: class com.example.Demo2Application
[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
What am I missing?
EDIT:
Obviously, I did mvn clean install on demo project. Funny thing is I can use with:
javac -cp .m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar <any java file here>
EDIT:
Last part of mvn -X:
[DEBUG] Classpath: [/home/ala/parent/demo2/target/classes
/home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar
/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar
/home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar
/home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar
/home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar
/home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar
/home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar
/home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar
/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar
/home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar
/home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar
/home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar
/home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar
/home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar
/home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar
/home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar]
[DEBUG] Output directory: /home/ala/parent/demo2/target/classes
[DEBUG] CompilerReuseStrategy: reuseCreated
[DEBUG] useIncrementalCompilation enabled
[DEBUG] Stale source detected: /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java
[INFO] Changes detected - recompiling the module!
[DEBUG] Classpath:
[DEBUG] /home/ala/parent/demo2/target/classes
[DEBUG] /home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar
[DEBUG] /home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar
[DEBUG] /home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar
[DEBUG] /home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar
[DEBUG] /home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar
[DEBUG] /home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar
[DEBUG] /home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar
[DEBUG] Source roots:
[DEBUG] /home/ala/parent/demo2/src/main/java
[DEBUG] Command line options:
[DEBUG] -d /home/ala/parent/demo2/target/classes -classpath /home/ala/parent/demo2/target/classes:/home/ala/.m2/repository/com/example/demo/0.0.1-SNAPSHOT/demo-0.0.1-SNAPSHOT.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter/1.5.1.RELEASE/spring-boot-starter-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot/1.5.1.RELEASE/spring-boot-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-context/4.3.6.RELEASE/spring-context-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-aop/4.3.6.RELEASE/spring-aop-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-beans/4.3.6.RELEASE/spring-beans-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/spring-expression/4.3.6.RELEASE/spring-expression-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.5.1.RELEASE/spring-boot-autoconfigure-1.5.1.RELEASE.jar:/home/ala/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.5.1.RELEASE/spring-boot-starter-logging-1.5.1.RELEASE.jar:/home/ala/.m2/repository/ch/qos/logback/logback-classic/1.1.9/logback-classic-1.1.9.jar:/home/ala/.m2/repository/ch/qos/logback/logback-core/1.1.9/logback-core-1.1.9.jar:/home/ala/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.22/jcl-over-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/slf4j/jul-to-slf4j/1.7.22/jul-to-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.22/log4j-over-slf4j-1.7.22.jar:/home/ala/.m2/repository/org/springframework/spring-core/4.3.6.RELEASE/spring-core-4.3.6.RELEASE.jar:/home/ala/.m2/repository/org/slf4j/slf4j-api/1.7.22/slf4j-api-1.7.22.jar: -sourcepath /home/ala/parent/demo2/src/main/java: -s /home/ala/parent/demo2/target/generated-sources/annotations -g -nowarn -target 1.8 -source 1.8 -encoding UTF-8
[DEBUG] incrementalBuildHelper#beforeRebuildExecution
[INFO] Compiling 1 source file to /home/ala/parent/demo2/target/classes
[DEBUG] incrementalBuildHelper#afterRebuildExecution
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
symbol: class Aclass
location: class com.example.Demo2Application
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
symbol: class Aclass
location: class com.example.Demo2Application
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.789 s
[INFO] Finished at: 2017-02-19T07:15:39+01:00
[INFO] Final Memory: 21M/201M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: Compilation failure: Compilation failure:
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,17] cannot find symbol
[ERROR] symbol: class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] /home/ala/parent/demo2/src/main/java/com/example/Demo2Application.java:[11,32] cannot find symbol
[ERROR] symbol: class Aclass
[ERROR] location: class com.example.Demo2Application
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project demo2: 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(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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:858)
at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
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]
[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

Here are few suggestions:
Run your broken build with "mvn -X clean install" for debugging. The log should include what repo. URLs Maven is looking for each dependency.
Unzip your jar file to verify classes you want are included or not.

Maven didn't found package com.example in this configuration.
<dependency>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version> </dependency>
So you must install this package as local package by use command: mvn clean install in the first project.
Or you can also install it as 3rd party package by using:
mvn install:install-file -Dfile={your directory}\demo-{version}.jar
-DgroupId=com.example
-DartifactId=demo -Dversion={version} -Dpackaging=jar
After install correctly, it will works.

Maven runs JUnit tests in Eclipse but compilation fails from the command line

I have created a very simple project in Eclipse to run a very simple JUnit test. These tests work fine when tests are executed from within Eclipse, but the code does not compile when run via maven command line.
The command I am using to run maven is simply 'maven test'. The following is the maven output:
MacBook-Pro:leonard-reference-test randy$ mvn test
[INFO] Scanning for projects...
[INFO]
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building leonard-reference-test 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # leonard-reference-test ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) # leonard-reference-test ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /Users/randy/PSH/workspaces/playground/leonard-reference-test/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /Users/randy/PSH/workspaces/playground/leonard-reference-test/src/main/java/info/leonard/reference/test/ReferenceTestClient.java:[3,17] package org.junit does not exist
[ERROR] /Users/randy/PSH/workspaces/playground/leonard-reference-test/src/main/java/info/leonard/reference/test/ReferenceTestClient.java:[8,10] cannot find symbol
symbol: class Test
location: class info.leonard.reference.test.ReferenceTestClient
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.043 s
[INFO] Finished at: 2015-12-15T19:10:49-07:00
[INFO] Final Memory: 11M/245M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.3:compile (default-compile) on project leonard-reference-test: Compilation failure: Compilation failure:
[ERROR] /Users/randy/PSH/workspaces/playground/leonard-reference-test/src/main/java/info/leonard/reference/test/ReferenceTestClient.java:[3,17] package org.junit does not exist
[ERROR] /Users/randy/PSH/workspaces/playground/leonard-reference-test/src/main/java/info/leonard/reference/test/ReferenceTestClient.java:[8,10] cannot find symbol
[ERROR] symbol: class Test
[ERROR] location: class info.leonard.reference.test.ReferenceTestClient
[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
MacBook-Pro:leonard-reference-test randy$
The pom.xml for this is as follows:
<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>info.leonard.reference</groupId>
<artifactId>leonard-reference-test</artifactId>
<version>0.0.1</version>
<prerequisites>
<maven>3.0</maven>
</prerequisites>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19</version>
</plugin>
</plugins>
</build>
</project>
And the only Java file in the project is as follows:
package info.leonard.reference.test;
import org.junit.Test;
public class ReferenceTestClient
{
#Test
public void testOne()
{
System.out.println("simple test");
}
}
That's it... no other files in the project. Maven tests run successfully from within Eclipse, but the code doesn't even compile from within Maven.
A valid pom.xml file, or other modifications to this simple project, is appreciated.

You have your file in src/main/java/ directory but the scope for the JUnit dependency is test. This means maven will not take it into account when compiling non-test code. Please put your file in src/test/java.

Test scope means that junit is only available in src/test/java
move
/Users/randy/PSH/workspaces/playground/leonard-reference-test/src/main/java/info/leonard/reference/test/ReferenceTestClient.java:
over to
/Users/randy/PSH/workspaces/playground/leonard-reference-test/src/test/java/info/leonard/reference/test/ReferenceTestClient.java:

Failed to execute goal org.apache.maven.plugins:maven-compiler

I have stuck up while running jersey. I have got compilation error and cant able to build the project.Please help me to solve the problem. I have specified my code below.
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.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building JerseyJSONExample 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) # JerseyJSONExample ---
[debug] execute contextualize
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) # JerseyJSONExample ---
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 3 source files to D:\Jersey\JerseyJSONExample\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] Unable to locate the Javac Compiler in:
C:\Program Files\Java\jre7\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.349s
[INFO] Finished at: Wed Apr 09 12:35:38 IST 2014
[INFO] Final Memory: 4M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project JerseyJSONExample: Compilation failure
[ERROR] Unable to locate the Javac Compiler in:
[ERROR] C:\Program Files\Java\jre7\..\lib\tools.jar
[ERROR] Please ensure you are using JDK 1.4 or above and
[ERROR] not a JRE (the com.sun.tools.javac.Main class is required).
[ERROR] In most cases you can change the location of your Java
[ERROR] installation by setting the JAVA_HOME environment variable.
[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
pom.xml
<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.javacodegeeks.enterprise.rest.jersey</groupId>
<artifactId>JerseyJSONExample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<repositories>
<repository>
<id>maven2-repository.java.net</id>
<name>Java.net Repository for Maven</name>
<url>http://download.java.net/maven/2/</url>
<layout>default</layout>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.9</version>
</dependency>
</dependencies>

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