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Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)

I want to generate a JAR but every time I get this error:
Console log
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.160 s
[INFO] Finished at: 2021-11-27T00:37:06+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile)
on project qengine: Fatal error compiling: invalid target release: 9 -> [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/MojoExecutionExceptions
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>napd</groupId>
<artifactId>qengine</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.eclipse.rdf4j</groupId>
<artifactId>rdf4j-bom</artifactId>
<version>3.7.3</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.eclipse.rdf4j</groupId>
<artifactId>rdf4j-client</artifactId>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.apache.jena</groupId>
<artifactId>apache-jena</artifactId>
<type>pom</type>
<version>3.9.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.1</version>
<configuration> <source>8</source> <target>8</target> </configuration> </plugin>
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId>
<configuration> <archive> <manifest> <mainClass>qengine.Main</mainClass>
</manifest> </archive> </configuration> </plugin> -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/allJars</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<!-- <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId>
<configuration> <source>9</source> <target>9</target> </configuration> </plugin> -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>9</source>
<target>9</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

(1) Is the JAVA_HOME variable configured to the JDK 9 path?
(2) Try replacing the configuration for maven-compiler-plugin:
<configuration>
<fork>true</fork>
<executable>javac9</executable>
</configuration>

Java Error - lambda expressions are not supported in -source 1.5 (use -source 8 or higher to enable lambda expressions)

I am trying to build a Kafka Streams Application that uses lambda expressions.
My maven build configuration is mvn clean install
When I do RunAs > Maven build, I get the following error:
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/junaid/eMumba/StreamsExample/streams.examples/src/main/java/myapps/Pipe.java:[53,38] lambda expressions are not supported in -source 1.5
(use -source 8 or higher to enable lambda expressions)
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.265 s
[INFO] Finished at: 2018-02-24T14:50:04+05:00
[INFO] Final Memory: 11M/150M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project streams.examples: Compilation failure
[ERROR] /home/junaid/eMumba/StreamsExample/streams.examples/src/main/java/myapps/Pipe.java:[53,38] lambda expressions are not supported in -source 1.5
[ERROR] (use -source 8 or higher to enable lambda expressions)
In Java Build Path I have JRE System Library [JavaSE 1.8].
In Preferences > Java > Installed JREs I have java-8-openjdk
This is my pom.xml:
I have added the org.apache.maven.plugins: maven-compiler-plugin dependency at the end.
<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>streamsexamples</groupId>
<artifactId>streams.examples</artifactId>
<version>0.1</version>
<packaging>jar</packaging>
<name>Kafka Streams Quickstart :: Java</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kafka.version>1.0.0</kafka.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<!-- Execute "mvn clean package -Pbuild-jar" to build a jar file out of
this project! -->
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>
${project.build.directory}/libs
</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>libs/</classpathPrefix>
<mainClass>
myapps.Pipe
</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- Apache Kafka dependencies -->
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-streams</artifactId>
<version>${kafka.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20180130</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
</dependency>
</dependencies>
</project>
What can I do to resolve this?

Try to add the source and target version to your pom:
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
See https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

Use this pom.xml. Specify the source and target versions for maven-compiler-plugin.
<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>streamsexamples</groupId>
<artifactId>streams.examples</artifactId>
<version>0.1</version>
<packaging>jar</packaging>
<name>Kafka Streams Quickstart :: Java</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kafka.version>1.0.0</kafka.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<!-- Execute "mvn clean package -Pbuild-jar" to build a jar file out of
this project! -->
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>
${project.build.directory}/libs
</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>libs/</classpathPrefix>
<mainClass>
myapps.Pipe
</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- Apache Kafka dependencies -->
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-streams</artifactId>
<version>${kafka.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20180130</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
</dependencies>

compilation failure for spring boot application with java 9 and maven

I am trying to build spring-boot application that uses java-9 and would be deployed to heroku. As a build tool I use maven.
I generated spring boot 1.5 application using initializr. I added heroku specific files and added toolchains.xml to .m2 repository for maven-compiler-plugin.
My pom.xml looks like this
<?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.lapots.breed.platform.cloud</groupId>
<artifactId>java-cloud-sample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>java-cloud-sample</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.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>1.9</java.version>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
<maven.compiler.release>9</maven.compiler.release>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</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>
<executions>
<execution>
<goals>
<goal>build-info</goal>
</goals>
<configuration>
<additionalProperties>
<encoding.source>${project.build.sourceEncoding}</encoding.source>
<encoding.reporting>${project.reporting.outputEncoding}</encoding.reporting>
<java.source>${maven.compiler.source}</java.source>
<java.target>${maven.compiler.target}</java.target>
</additionalProperties>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-toolchains-plugin</artifactId>
<version>1.1</version>
<configuration>
<toolchains>
<jdk>
<version>1.9</version>
<vendor>oracle</vendor>
</jdk>
</toolchains>
</configuration>
<executions>
<execution>
<goals>
<goal>toolchain</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
When I try to compiler project using mvn clean package I get the error
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] javac: invalid flag: -Xmodule:null
Usage: javac <options> <source files>
use --help for a list of possible options
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.031 s
[INFO] Finished at: 2017-08-30T21:08:25+03:00
[INFO] Final Memory: 20M/309M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.0:testCompile (default-testCompile) on
project java-cloud-sample: Compilation failure
[ERROR] javac: invalid flag: -Xmodule:null
[ERROR] Usage: javac <options> <source files>
[ERROR] use --help for a list of possible options
[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/MojoFailureException
module-info looks like this
module com.lapots.breed.platform.cloud.javacloudsample {
requires spring.boot;
}
What is the problem? Project available here
github repository

maven-compiler-plugin 3.6.0 is based on the first signature of module-info.class, which has changed a couple of times. It is not compatible with current Java 9 signature. You should use 3.6.2 when using most recent versions of JDK 9.

Looks like your toolchains.xml does not include an entry for Java 9. Try this:
<toolchain>
<type>jdk</type>
<provides>
<version>1.9</version>
<vendor>oracle</vendor>
</provides>
<configuration>
<jdkHome>/path/to/jdk/9</jdkHome>
</configuration>
</toolchain>

Rightly pointed out by #Robert you need to update your maven-compiler-plugin. To add to it, also as stated in the Maven/Jigsaw+9 over the maven plugins. The minimum compatible version of maven-compiler-plugin with current jdk-9+181 is 3.6.2 which can be used as :
<!--Minimum compatible version required-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
<configuration>
<jdkToolchain>
<version>9</version>
</jdkToolchain>
</configuration>
</plugin>
And to quote from one of the examples of maven-compiler-plugin with module-info.java here:
For projects that want to be compatible with older versions of Java
(i.e 1.8 or below), but also want to provide a module-info.java for
Java 9 projects must be aware that they need to call javac twice: the
module-info.java must be compiled with release=9, while the rest of
the sources must be compiled with a lower version of source/target.
which can be achieved using (JAVA_HOME set as 1.8.x) :
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
<executions>
<execution>
<id>default-compile</id>
<configuration>
<!-- compile everything to ensure module-info contains right entries -->
<!-- required when JAVA_HOME is JDK 8 or below -->
<jdkToolchain>
<version>9</version>
</jdkToolchain>
<release>9</release>
</configuration>
</execution>
<execution>
<id>base-compile</id>
<goals>
<goal>compile</goal>
</goals>
<!-- recompile everything for target VM except the module-info.java -->
<configuration>
<excludes>
<exclude>module-info.java</exclude>
</excludes>
</configuration>
</execution>
</executions>
<!-- defaults for compile and testCompile -->
<configuration>
<!-- jdkToolchain required when JAVA_HOME is JDK 9 or above -->
<jdkToolchain>
<version>[1.5,9)</version>
</jdkToolchain>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
Few things to note there though are:
... you will need at least Maven 3.3.1 to specify a custom
jdkToolchain in your plugin configuration
Or you can also configure the JAVA_HOME as /jdk9/Contents/Home/bin and use the following configuration:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
<executions>
<execution>
<id>default-compile</id>
<configuration>
<!-- compile everything to ensure module-info contains right entries -->
<release>9</release>
</configuration>
</execution>
<execution>
<id>base-compile</id>
<goals>
<goal>compile</goal>
</goals>
<!-- recompile everything for target VM except the module-info.java -->
<configuration>
<excludes>
<exclude>module-info.java</exclude>
</excludes>
</configuration>
</execution>
</executions>
<!-- defaults for compile and testCompile -->
<configuration>
<!-- Only required when JAVA_HOME isn't at least Java 9 and when haven't configured the maven-toolchains-plugin -->
<jdkToolchain>
<version>9</version>
</jdkToolchain>
<release>6</release>
</configuration>
</plugin>

sonar-maven-plugin: Can not set sonar.sources src/main/resources

I have a problem with maven-sonar settings. I need to include all my project files at src/main/java and src/main/resources so that SonarQube will show results of all my files but exclude some files in src/main/resources/static/file. For test path it is already set by default at src/test/java
This is How i set my POM.XML
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
<!-- Sonar static analysis / Jacoco code coverage -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<start-class>com.Example.wp.WpCoreApplication</start-class>
<java.version>1.8</java.version>
<sonar.sources>src/main/java, src/main/resources</sonar.sources>
<sonar.exclusions>src/main/resources/static/file</sonar.exclusions>
</properties>
<dependencies>
<!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-cassandra</artifactId>
</dependency> -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>info.debatty</groupId>
<artifactId>java-string-similarity</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.11</version>
</dependency>
</dependencies>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.7.2</version>
</plugin>
</plugins>
</reporting>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19.1</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>2.19.1</version>
</dependency>
</dependencies>
<configuration>
<argLine>${jacoco.agent.argLine}</argLine>
<skipTests>false</skipTests>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
</plugin>
<plugin>
<groupId>org.sonarsource.scanner.maven</groupId>
<artifactId>sonar-maven-plugin</artifactId>
<version>3.1.1</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.7.201606060606</version>
<configuration>
<dataFile>target/jacoco.exec</dataFile>
</configuration>
<executions>
<execution>
<id>jacoco-initialize</id>
<phase>initialize</phase>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<propertyName>jacoco.agent.argLine</propertyName>
<destFile>target/jacoco.exec</destFile>
</configuration>
</execution>
<execution>
<id>jacoco-report</id>
<phase>verify</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-site-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>rpm-maven-plugin</artifactId>
<version>2.1-alpha-3</version>
<executions>
<execution>
<id>attach-rpm</id>
<goals>
<goal>attached-rpm</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
But when I run my maven-sonar with command prompt: mvn sonar:sonar . There is error log like this
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.865 s
[INFO] Finished at: 2016-11-28T14:46:40+07:00
[INFO] Final Memory: 68M/449M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin:
3.1.1:sonar (default-cli) on project wp: The directory 'D:\PROJECT\wp-core\
src\main\resources' does not exist for Maven module com.sample:wp:jar:0.1.26. Pleas
e check the property sonar.sources -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[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 rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionE
xception
How I can setup sonar so that It can scan all my files? I already look at documentation and this Stackoverflow

You should probably remove the extra space. Change
<sonar.sources>src/main/java, src/main/resources</sonar.sources>
to
<sonar.sources>src/main/java,src/main/resources</sonar.sources>

Only below specified entries related to sonar are required by sonarQube for static code analysis.
Under the properties tag in your pom.xml, add only following entries related to sonar: You can property. By default sonar will scal all files placed under src folder.
<sonar.language>java</sonar.language>
<sonar.exclusions>
**/static/file/**
</sonar.exclusions>
Under the plugins tag in your pom.xml, replace your maven-surefire-plugin and jacoco-maven-plugin entries with following entries:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.13</version>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.2.201409121644</version>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
Lets not add all those parameters which are actually not required by sonar for static code analysis.
You will see that, I have added only and property in properties tag.
The correct syntax to use is not to use src/main/ this type of path. If you specify src/main in sonar.exclusions then sonar will not exclude files from static code analysis.
I faced this issue in my project.
Let me know if it still you face some issues.

Error in publishing Artifact to maven central

I have been trying to release an artifact to maven central repository. Had read so many threads online, that has to do with setting up a sona account and a couple of other things.
Anyway, my pom.xml currently looks like this:
<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.github.username</groupId>
<artifactId>artifact_id_details</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<name>reponame</name>
<url>http://maven.apache.org</url>
<licenses>
<license>
<name>Apache License, Version 2.0</name>
<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
<distribution>https://github.com/username/repo</distribution>
</license>
</licenses>
<scm>
<connection>scm:git:ssh://git#github.com/username/repo.git</connection>
<developerConnection>scm:git:ssh://git#github.com/username/repo.git</developerConnection>
<url>https://github.com/username/repo</url>
<tag>currency</tag>
</scm>
<developers>
<developer>
<name>My Name</name>
<email>myemail#gmail.com</email>
<organization>My_ORganisation</organization>
<organizationUrl>https://www.example.com</organizationUrl>
</developer>
</developers>
<distributionManagement>
<snapshotRepository>
<id>ossrh</id>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
</snapshotRepository>
<repository>
<id>ossrh</id>
<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
</repository>
</distributionManagement>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.sonatype.plugins</groupId>
<artifactId>nexus-staging-maven-plugin</artifactId>
<version>1.6.3</version>
<extensions>true</extensions>
<configuration>
<serverId>ossrh</serverId>
<nexusUrl>https://oss.sonatype.org/</nexusUrl>
<autoReleaseAfterClose>true</autoReleaseAfterClose>
</configuration>
</plugin>
<plugin>
<groupId>org.sonatype.plugins</groupId>
<artifactId>nexus-staging-maven-plugin</artifactId>
<version>1.6.3</version>
<extensions>true</extensions>
<configuration>
<serverId>ossrh</serverId>
<nexusUrl>https://oss.sonatype.org/</nexusUrl>
<autoReleaseAfterClose>true</autoReleaseAfterClose>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<profiles>
<profile>
<id>release</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>2.2.1</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar-no-fork</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.9.1</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-gpg-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>sign-artifacts</id>
<phase>verify</phase>
<goals>
<goal>sign</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
</profiles>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
I run this command :
sudo mvn release:clean release:prepare
This failes with the error .
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 21.430 s
[INFO] Finished at: 2016-11-04T13:27:41+01:00
[INFO] Final Memory: 12M/155M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.3.2:prepare (default-cli) on project unicodenames-othersymbols-currency: Unable to tag SCM
[ERROR] Provider message:
[ERROR] The git-push command failed.
[ERROR] Command output:
[ERROR] Permission denied (publickey).
[ERROR] fatal: Could not read from remote repository.
[ERROR]
[ERROR] Please make sure you have the correct access rights
[ERROR] and the repository exists.
[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.
I have added an ssh key as describe here . Nothing yet. How do I fix this ?

Have you specified the password in maven settings.xml?
Here is an example from one of my projects:
pom.xml:
<scm>
<url>https://github.com/brutusin/wava</url>
<connection>scm:git:https://github.com/brutusin/wava.git</connection>
<developerConnection>scm:git:https://github.com/brutusin/wava.git</developerConnection>
<tag>HEAD</tag>
</scm>
settings.xml:
<server>
<id>github.com</id>
<username>idelvall</username>
<password>${github-token}</password>
</server>