Problem with deployind JAVA SpringBoot App using Heroku [duplicate] - java

I am trying to start with Spring-boot, Maven in Intellij
Please help me I am getting the error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project spring-rest: Fatal error compiling: invalid flag: --release -> [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
Process finished with exit code 1
My pom.xml is:
<?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>spring-rest</artifactId>
<version>3.1.3.RELEASE</version>
<packaging>war</packaging>
<name>spring-rest</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.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-security</artifactId>
<version>2.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</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>
</plugin>
<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>
<release>8</release>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
</project>

In your pom.xml file, simply remove the tag <release>8</release> from your maven-compiler-plugin configuration:
<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>
<verbose>true</verbose>
</configuration>
</plugin>

This has to do with the version of JDK running on your system. As per the documentation for maven-compiler-plugin, the release flag is supported since 1.9, and thus has to be commented/removed from the POM if you are using prior (1.8 and below) versions of JDK.
Check Maven documentation for release tag for maven-compiler-plugin here

open terminal to check that Maven using correct version of Java
run: mvn -v
If you will see an old Java version, that might be the problem.
Being on Linux, I suggest removing Maven, e.g. using Fedora package manager dnf remove maven or check your PATH for maven.
Download one from here: https://maven.apache.org/download.cgi
Extract downloaded to your home path, e.g. ~/maven.
Add/Edit ~/maven/bin to your PATH
Reapply .bash_profile (or re-login)
Run mvn -v
Now you should see a correct Java version in the output

I faced this problem too, check your JAVA_HOME environment variable.
I was setting the value of release to 11 as I am using JAVA 11.
My System JAVA_HOME was set for java 8, After adding the JAVA_HOME user environment variable to the java 11 path this got resolved.

An alternative approach is to directly set the compiler flags inside your properties tag instead of using the <configuration> tag of the compiler plugin:
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<!-- Use the release flag only if you are using Java 9+ -->
<!-- <maven.compiler.release>8</maven.compiler.release> -->
<!-- verbose is useful for debugging purposes -->
<maven.compiler.verbose>true</maven.compiler.verbose>
</properties>
As stated in the official page:
https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

This is mostly because of the java version mismatch. Managing more than one java version for projects can be painful.
I am working simultaneously on projects asking for different versions of java and have been using jenv for switching the java versions.
More details here

I was getting this error with Java v8, then resolved the issue by updating to Java v11, updating JAVA_HOME, and updating my IntelliJ SDK settings to use the new jdk.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile (default-testCompile) on project selenium-for-beginners: Execution default-testCompile of goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile failed: multiple points -> [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/PluginExecutionException
When trying to do a Selenium maven beginner project if you are running into this trouble/issue. Please try to change the maven plugin in the pom.xml file. Use Plugin for "Compile Using the --release javac option (JDK 9+)". This should work.

Set the $MAVEN_HOME and JAVA_HOME in environment Properties
Check the maven version ( C:>mvn -version )
Check the Java Version
( C:>java -version )
Add the below code snip in pom.xml file and change the version number of maven
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version> // replace the maven version number
<configuration>
<source>1.8</source>
<target>1.8</target>
<verbose>true</verbose>
</configuration>
</plugin>

This configuration worked for me, for java 11. (IntelliJ version 2019.1)
java.version is 11, declared in the properties part of the pom.xml. Maven version should be 3.6 or higher.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<fork>false</fork>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>UTF-8</encoding>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<release>${java.version}</release>
<forceJavacCompilerUse>true</forceJavacCompilerUse>
</configuration>
<executions>
<!-- Replacing default-compile as it is treated specially by maven -->
<execution>
<id>default-compile</id>
<phase>none</phase>
</execution>
<!-- Replacing default-testCompile as it is treated specially by maven -->
<execution>
<id>default-testCompile</id>
<phase>none</phase>
</execution>
<execution>
<id>java-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>java-test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>

Related

Error submitting remote command: sun/misc/BASE64Encoder: sun.misc.BASE64Encoder

I'm trying to do cargo:deployer-redeploy but keeps on getting this error:
[ERROR] Failed to execute goal org.codehaus.cargo:cargo-maven2-plugin:1.8.1:deployer-redeploy (default-cli) on project backend-server:
Execution default-cli of goal org.codehaus.cargo:cargo-maven2-plugin:1.8.1:deployer-redeploy failed: error submitting remote command: sun/misc/BASE64Encoder: sun.misc.BASE64Encoder -> [Help 1]
Here's the plugin I am using:
<plugin>
<groupId>org.codehaus.cargo</groupId>
<artifactId>cargo-maven2-plugin</artifactId>
<configuration>
<container>
<containerId>glassfish4x</containerId>
<type>remote</type>
</container>
<configuration>
<type>runtime</type>
<properties>
<cargo.remote.username>${payara.username}</cargo.remote.username>
<cargo.remote.password>${payara.password}</cargo.remote.password>
<cargo.glassfish.admin.port>${payara.adminPort}</cargo.glassfish.admin.port>
<cargo.hostname>${payara.hostname}</cargo.hostname>
</properties>
</configuration>
</configuration>
<!-- provides JSR88 client API to deploy on Payara Server -->
<dependencies>
<dependency>
<groupId>org.glassfish.main.deployment</groupId>
<artifactId>deployment-client</artifactId>
<version>4.1.1</version>
</dependency>
</dependencies>
</plugin>
Check your Java version. I was getting this error until I found I was accidentally using Java 15. Switching back to Java 8 solved the issue.

Intellij maven project Fatal error compiling: invalid flag: --release

I am trying to start with Spring-boot, Maven in Intellij
Please help me I am getting the error:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project spring-rest: Fatal error compiling: invalid flag: --release -> [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
Process finished with exit code 1
My pom.xml is:
<?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>spring-rest</artifactId>
<version>3.1.3.RELEASE</version>
<packaging>war</packaging>
<name>spring-rest</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.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-security</artifactId>
<version>2.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</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>
</plugin>
<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>
<release>8</release>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
</project>
In your pom.xml file, simply remove the tag <release>8</release> from your maven-compiler-plugin configuration:
<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>
<verbose>true</verbose>
</configuration>
</plugin>
This has to do with the version of JDK running on your system. As per the documentation for maven-compiler-plugin, the release flag is supported since 1.9, and thus has to be commented/removed from the POM if you are using prior (1.8 and below) versions of JDK.
Check Maven documentation for release tag for maven-compiler-plugin here
open terminal to check that Maven using correct version of Java
run: mvn -v
If you will see an old Java version, that might be the problem.
Being on Linux, I suggest removing Maven, e.g. using Fedora package manager dnf remove maven or check your PATH for maven.
Download one from here: https://maven.apache.org/download.cgi
Extract downloaded to your home path, e.g. ~/maven.
Add/Edit ~/maven/bin to your PATH
Reapply .bash_profile (or re-login)
Run mvn -v
Now you should see a correct Java version in the output
I faced this problem too, check your JAVA_HOME environment variable.
I was setting the value of release to 11 as I am using JAVA 11.
My System JAVA_HOME was set for java 8, After adding the JAVA_HOME user environment variable to the java 11 path this got resolved.
An alternative approach is to directly set the compiler flags inside your properties tag instead of using the <configuration> tag of the compiler plugin:
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<!-- Use the release flag only if you are using Java 9+ -->
<!-- <maven.compiler.release>8</maven.compiler.release> -->
<!-- verbose is useful for debugging purposes -->
<maven.compiler.verbose>true</maven.compiler.verbose>
</properties>
As stated in the official page:
https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html
This is mostly because of the java version mismatch. Managing more than one java version for projects can be painful.
I am working simultaneously on projects asking for different versions of java and have been using jenv for switching the java versions.
More details here
I was getting this error with Java v8, then resolved the issue by updating to Java v11, updating JAVA_HOME, and updating my IntelliJ SDK settings to use the new jdk.
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile (default-testCompile) on project selenium-for-beginners: Execution default-testCompile of goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile failed: multiple points -> [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/PluginExecutionException
When trying to do a Selenium maven beginner project if you are running into this trouble/issue. Please try to change the maven plugin in the pom.xml file. Use Plugin for "Compile Using the --release javac option (JDK 9+)". This should work.
Set the $MAVEN_HOME and JAVA_HOME in environment Properties
Check the maven version ( C:>mvn -version )
Check the Java Version
( C:>java -version )
Add the below code snip in pom.xml file and change the version number of maven
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version> // replace the maven version number
<configuration>
<source>1.8</source>
<target>1.8</target>
<verbose>true</verbose>
</configuration>
</plugin>
This configuration worked for me, for java 11. (IntelliJ version 2019.1)
java.version is 11, declared in the properties part of the pom.xml. Maven version should be 3.6 or higher.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<fork>false</fork>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>UTF-8</encoding>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<release>${java.version}</release>
<forceJavacCompilerUse>true</forceJavacCompilerUse>
</configuration>
<executions>
<!-- Replacing default-compile as it is treated specially by maven -->
<execution>
<id>default-compile</id>
<phase>none</phase>
</execution>
<!-- Replacing default-testCompile as it is treated specially by maven -->
<execution>
<id>default-testCompile</id>
<phase>none</phase>
</execution>
<execution>
<id>java-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>java-test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>

fatal error compiling invalid flag --module-path

I have a project. Originally it was a single module project with structure like this
java-cloud-sample\
src\
main\
java
pom.xml
I decided to make it into a multi-module structure - I use java 9 anyway.
So I separated it like this
java-cloud-sample\
java-cloud-rest-api\
src\
pom.xml
pom.xml
Where root 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>pom</packaging>
<modules>
<module>java-cloud-rest-api</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.0.1</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals><goal>copy-dependencies</goal></goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
And module 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>
<parent>
<groupId>com.lapots.breed.platform.cloud</groupId>
<artifactId>java-cloud-sample</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>java-cloud-rest-api</artifactId>
<description>Demo project for Spring Boot</description>
<packaging>jar</packaging>
<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-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</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>
</plugins>
</build>
</project>
But when I try to run mvn clean package I get
INFO] java-cloud-rest-api ................................ FAILURE [ 1.060 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.104 s
[INFO] Finished at: 2017-09-08T17:15:46+03:00
[INFO] Final Memory: 27M/331M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.2:compile (default-compile) on project java-cloud-rest-api: Fatal error compiling: invalid flag: --module-path -> [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
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :java-cloud-rest-api
What is the problem? (maybe I should split maven project into separate modules and each maven module split into java modules)
This failure occurs when maven installed on your machine is configured with java8 as the default java version. You can confirm this by executing
mvn -version
on your terminal and checking the Java version stated in the configuration.
To resolve the version to a newer and supported version like java9 at the moment, you can create/edit the mavenrc(on MacOS) file on your machine:
vi ~/.mavenrc
to include these
export PATH
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/
export PATH=${PATH}:$JAVA_HOME/bin
Once you save this configuration, you can confirm maven should be using Java version 9 using the same command and then your project shall build without the stated error.
I had this error with the Maven compiler plugin 3.8.1 when a project was defining a module-info.java and Java 8 was used with Maven to compile the project. It seems that as soon a module-info.java is seen by the Maven compiler plugin it is adding the flag --module-path to the command line which is unknown to the Java 8 compiler. A way to exclude this file and compile the project without module support is to exclude the module-info.java from compilation based on a Maven profile:
<profiles>
<profile>
<id>java8</id>
<activation>
<jdk>1.8</jdk>
</activation>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<excludes>
<exclude>module-info.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</profile>

Maven dependency version dependent on JVM version

I'm trying to create a Maven POM which will pull in the correct version of alpn-boot when building the project and running the tests.
The whole thing works if I'm injecting the property from "outside" when running the build (e. g. via mvn -Dalpn-boot.version=8.1.8.v20160420 test or as an environment variable) but not when trying to interpolate it inside the POM using ${java.version}.
I've tried using properties-maven-plugin to accomplish this with the following settings in the pom.xml file (snippet):
<project>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>${project.basedir}/alpn-boot/jdk-${java.version}.properties</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.mortbay.jetty.alpn</groupId>
<artifactId>alpn-boot</artifactId>
<version>${alpn-boot.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
Contents of one of the properties files:
$ cat alpn-boot/jdk-1.8.0_92.properties
alpn-boot.version=8.1.8.v20160420
Basically the same problem with the gmaven-plugin:
<plugin>
<groupId>org.codehaus.groovy.maven</groupId>
<artifactId>gmaven-plugin</artifactId>
<version>1.0</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>execute</goal>
</goals>
<configuration>
<source>
alpnVersions = [ '1.8.0_92': '8.1.8.v20160420' ]
project.properties['alpn-boot.version'] = alpnVersions[System.getProperty('java.version')]
</source>
</configuration>
</execution>
</executions>
</plugin>
With both approaches I get the following error message:
[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] 'dependencies.dependency.version' for org.mortbay.jetty.alpn:alpn-boot:jar must be a valid version but is '${alpn-boot.version}'. # org.example:my-project:[unknown-version], /path/to/pom.xml, line 132, column 22
#
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project org.example:my-project:1.0.0-rc3-SNAPSHOT (/path/to/pom.xml) has 1 error
[ERROR] 'dependencies.dependency.version' for org.mortbay.jetty.alpn:alpn-boot:jar must be a valid version but is '${alpn-boot.version}'. # org.example:my-project:[unknown-version], /path/to/pom.xml, line 132, column 22
[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/ProjectBuildingException
I ended up following the advice of #khmarbaise and add a Maven profile for each version of the JDK which needs to be supported:
<properties>
<!-- Default alpn-boot version. See <profiles> for specific profiles. -->
<alpn-boot.version>8.1.3.v20150130</alpn-boot.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mortbay.jetty.alpn</groupId>
<artifactId>alpn-boot</artifactId>
<version>${alpn-boot.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<!-- Profiles for selecting the correct version of alpn-boot for each JDK.
see http://www.eclipse.org/jetty/documentation/current/alpn-chapter.html for reference. -->
<profiles>
<profile>
<id>jdk-1.8.0</id>
<activation>
<jdk>1.8.0</jdk>
</activation>
<properties>
<alpn-boot.version>8.1.0.v20141016</alpn-boot.version>
</properties>
</profile>
<!-- Lots of profiles [...] -->
<profile>
<id>jdk-1.8.0_92</id>
<activation>
<jdk>1.8.0_92</jdk>
</activation>
<properties>
<alpn-boot.version>8.1.8.v20160420</alpn-boot.version>
</properties>
</profile>
</profiles>

Maven compilation error for android Project "error: package R does not exist "

I am trying to set up a MAVEN project with Android application.
I have this pom 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.myproject</groupId>
<artifactId>userprofile</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>userprofile</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>4.1.1.4</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
and during MAVEN compile I get this error (about 100 times, ie as many times as it is used in my methods)
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
src\main\java\com\myproject\userprofile\BaseActivity.java:[52,43] error: package R does not exist
Process finished with exit code 1
Any idea about this error? On the web I either find unanswered questions about similar error output. I have no experience on MAVEN, so I believe I am missing something here.
R class is build by your IDE during compilation. MAVEN cannot find the R class because by default the class can be found under build folder. You need to add something like this
<sourceDirectory>build</sourceDirectory>
<outputDirectory>target</outputDirectory>
telling MAVEN that you have some resource files under build folder and you want to make them available to compile so add them under the target folder which will be under your project.
so now I have
build
|----res
|----src
src
|----main
|----java
|----res
target
After a quick look, I believe you're missing the build element. Maven is building the project with current sources, R and other gen classes have not been generated yet. At least you need something like (after dependencies tag):
<build>
<finalName>${project.artifactId}</finalName>
<sourceDirectory>src</sourceDirectory>
<pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.7.0</version>
<extensions>true</extensions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<configuration>
<sdk>
<!-- platform or api level (api level 16 = platform 4.1)-->
<platform>16</platform>
</sdk>
</configuration>
</plugin>
</plugins>
</build>
Also the packaging must be apk:
<packaging>apk</packaging>
I would strongly recommend to start reading the Android Maven documentation along with samples.
This error might happen if you had modify the package name that generate by archetype:generate, for me, I use android-quickstart to generate the module structure :
mvn archetype:generate \
-DarchetypeArtifactId=android-quickstart \
-DarchetypeGroupId=de.akquinet.android.archetypes \
-DarchetypeVersion=1.0.11 \
-DgroupId=com.yy.android.gameLibs \
-DartifactId=sample
akquient recommend me to use "com.yy.android.gameLibs" as package name and I accepted, I compile this module successful and worked. After that, I change the package name as "com.yy.android.sample" also change the Androidmenifest.xml package attribute, therefore the module report that error, I follow back the generate command and choice package name myself to solve this.
Modify packaging to apklib, like this:
<packaging>apklib</packaging>
And add build goal at end of pom.xml like this:
<dependencies>
<!--Android deps -->
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>4.0.1.2</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<sdk>
<platform>17</platform>
</sdk>
</configuration>
<extensions>true</extensions>
</plugin>
</plugins>
</build>

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