Develop Reference

Maven including non-defined dependencies

My Maven is failing with the following error:
[ERROR] Failed to execute goal on project sdcf4j-twitch: Could not resolve dependencies for project com.github.twitch4j:sdcf4j-twitch:jar:1.0.9: Failed to collect dependencies at com.github.twitch4j:twitch4j:jar:v0.10.2 -> org.projectlombok:lombok:jar:+: Failed to read artifact descriptor for org.projectlombok:lombok:jar:+: Could not transfer artifact org.projectlombok:lombok:pom:+ from/to jitpack.io (https://jitpack.io): Transfer failed for https://jitpack.io/org/projectlombok/lombok/+/lombok-+.pom 400 Bad Request -> [Help 1]
I already tried completely wiping Intellij IDEA's files, and re-adding the dependencies, which didn't help with the error, but some wrong dependencies, that my IDE displayed.
Of course I already tried without any lombok plugin, (lombok) annotation paths and a mvn clear, but that didn't help either.
The Maven code for that project is the following:
<?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>de.btobastian.sdcf4j</groupId>
<artifactId>sdcf4j</artifactId>
<version>1.0.9</version>
</parent>
<groupId>com.github.twitch4j</groupId>
<artifactId>sdcf4j-twitch</artifactId>
<version>1.0.9</version>
<repositories>
<repository>
<id>jcenter</id>
<url>https://jcenter.bintray.com/</url>
</repository>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.16</version>
</path>
</annotationProcessorPaths>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<!-- Include source -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>2.0.4</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Include JavaDocs -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.2</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
<configuration>
<stylesheet>java</stylesheet>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- The core module -->
<dependency>
<groupId>de.btobastian.sdcf4j</groupId>
<artifactId>sdcf4j-core</artifactId>
<version>${project.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.github.twitch4j</groupId>
<artifactId>twitch4j</artifactId>
<version>v0.10.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.16</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
The Parent Pom does not differ from the original at https://github.com/Bastian/sdcf4j/blob/8f569ee5dc36be09c6595c12833d109b7127c23e/pom.xml.
If one sets up the folders correctly, you can add sdcf4j-twitch as a module in sdcf4j, just like sdcf4j-core,sdcf4j-discord4j in L17
Complete Build log:
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------< com.github.twitch4j:sdcf4j-twitch >------------------
[INFO] Building sdcf4j-twitch 1.0.9
[INFO] --------------------------------[ jar ]---------------------------------
Downloading from jitpack.io: https://jitpack.io/org/projectlombok/lombok/+/lombok-+.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.968 s
[INFO] Finished at: 2020-12-10T22:55:31+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project sdcf4j-twitch: Could not resolve dependencies for project com.github.twitch4j:sdcf4j-twitch:jar:1.0.9: Failed to collect dependencies at com.github.twitch4j:twitch4j:jar:v0.10.2 -> org.projectlombok:lombok:jar:+: Failed to read artifact descriptor for org.projectlombok:lombok:jar:+: Could not transfer artifact org.projectlombok:lombok:pom:+ from/to jitpack.io (https://jitpack.io): Transfer failed for https://jitpack.io/org/projectlombok/lombok/+/lombok-+.pom 400 Bad Request -> [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/DependencyResolutionException

Connection time out, Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved

I am getting below error while doing mvn insatll. I did almost everything to resolve it like:Force Update,I deleted the /.m2 folder as well.Not using any Proxy as well, also checked the /user/.m2/settings.xml file. What else I could do please help? I have also added my POM.xml file below.
Error:
[INFO] --------------------------------[ war ]---------------------------------
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.6/maven-resources-plugin-2.6.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 28.775 s
[INFO] Finished at: 2020-05-22T18:36:39+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-resources-plugin:jar:2.6: Could not transfer artifact org.apache.maven.plugins:maven-resources-plugin:pom:2.6 from/to central (https://repo.maven.apache.org/maven2): Transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.6/maven-resources-plugin-2.6.pom ProxyInfo{host='172.19.217.26', userName='null', port=8080, type='https', nonProxyHosts='null'}: Connect to 172.19.217.26:8080 [/172.19.217.26] failed: Connection timed out: connect -> [Help 1]
[ERROR]
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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.aman.emi</groupId>
<artifactId>Dev-portlet</artifactId>
<packaging>war</packaging>
<name>productionstatus-portlet</name>
<version>1.0</version>
<properties>
<faces.api.version>2.2</faces.api.version>
<liferay.faces.bridge.ext.version>5.0.0</liferay.faces.bridge.ext.version>
<liferay.faces.bridge.version>4.0.0</liferay.faces.bridge.version>
<mojarra.version>2.2.13</mojarra.version>
</properties>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<encoding>UTF-8</encoding>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<filteringDeploymentDescriptors>true</filteringDeploymentDescriptors>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- https://mvnrepository.com/artifact/oracle/ojdbc6 -->
<!-- <dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.22</version>
</dependency> -->
<!-- https://mvnrepository.com/artifact/com.github.noraui/ojdbc7 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
<optional>true</optional>
</dependency>
</dependencies>
</project>

Mule - Project build failed when running with maven

I'm getting a failure trying to run a Hello World Mulesoft project, it looks like it related to the version of Mulesoft that I'm running, I googled around but I couldn't get any info to help resolve this issue, here is the build error:
[10:01:21] Running: mvn clean package -DskipMunitTests
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Mule firsttest Application 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for com.mulesoft.muleesb:mule-core-ee:jar:3.8.4 is missing, no dependency information available
[WARNING] The POM for com.mulesoft.muleesb.modules:mule-module-spring-config-ee:jar:3.8.4 is missing, no dependency information available
[WARNING] The POM for com.mulesoft.muleesb.transports:mule-transport-jdbc-ee:jar:3.8.4 is missing, no dependency information available
[WARNING] The POM for com.mulesoft.muleesb.transports:mule-transport-jms-ee:jar:3.8.4 is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.496 s
[INFO] Finished at: 2017-08-31T10:01:27-05:00
[INFO] Final Memory: 8M/245M
[INFO] ------------------------------------------------------------------------
[WARNING] The requested profile "compiler" could not be activated because it does not exist.
[ERROR] Failed to execute goal on project firsttest: Could not resolve dependencies for project com.schwab:firsttest:mule:1.0.0-SNAPSHOT: Failed to collect dependencies at org.mule.transports:mule-transport-file:jar:3.8.4: Failed to read artifact descriptor for org.mule.transports:mule-transport-file:jar:3.8.4: Failure to find org.mule.transports:mule-transports:pom:3.8.4 in http://repo1.maven.org/maven2/ was cached in the local repository, resolution will not be reattempted until the update interval of Central has elapsed or updates are forced -> [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/DependencyResolutionException
Here is the POM file:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<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.schwab</groupId>
<artifactId>firsttest</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>mule</packaging>
<name>Mule firsttest Application</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<mule.version>3.8.4</mule.version>
<mule.tools.version>1.2</mule.tools.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.mule.tools.maven</groupId>
<artifactId>mule-app-maven-plugin</artifactId>
<version>${mule.tools.version}</version>
<extensions>true</extensions>
<configuration>
<copyToAppsDirectory>true</copyToAppsDirectory>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<id>add-resource</id>
<phase>generate-resources</phase>
<goals>
<goal>add-resource</goal>
</goals>
<configuration>
<resources>
<resource>
<directory>src/main/app/</directory>
</resource>
<resource>
<directory>src/main/api/</directory>
</resource>
<resource>
<directory>mappings/</directory>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<!-- Mule Dependencies -->
<dependencies>
<!-- Xml configuration -->
<dependency>
<groupId>com.mulesoft.muleesb</groupId>
<artifactId>mule-core-ee</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<!-- Xml configuration -->
<dependency>
<groupId>com.mulesoft.muleesb.modules</groupId>
<artifactId>mule-module-spring-config-ee</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<!-- Mule Transports -->
<dependency>
<groupId>org.mule.transports</groupId>
<artifactId>mule-transport-file</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mule.transports</groupId>
<artifactId>mule-transport-http</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.mulesoft.muleesb.transports</groupId>
<artifactId>mule-transport-jdbc-ee</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.mulesoft.muleesb.transports</groupId>
<artifactId>mule-transport-jms-ee</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mule.transports</groupId>
<artifactId>mule-transport-vm</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<!-- Mule Modules -->
<dependency>
<groupId>org.mule.modules</groupId>
<artifactId>mule-module-scripting</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mule.modules</groupId>
<artifactId>mule-module-xml</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<!-- for testing -->
<dependency>
<groupId>org.mule.tests</groupId>
<artifactId>mule-tests-functional</artifactId>
<version>${mule.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mule.modules</groupId>
<artifactId>mule-module-http</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mule.modules</groupId>
<artifactId>mule-module-spring-config</artifactId>
<version>${mule.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>Central</id>
<name>Central</name>
<url>http://repo1.maven.org/maven2/</url>
<layout>default</layout>
</repository>
<repository>
<id>mulesoft-releases</id>
<name>MuleSoft Releases Repository</name>
<url>http://repository.mulesoft.org/releases/</url>
<layout>default</layout>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>mulesoft-release</id>
<name>mulesoft release repository</name>
<layout>default</layout>
<url>http://repository.mulesoft.org/releases/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
Any idea of what's going on?
Your help is appreciated.

Maven cannot find transports:mule-transport-file:jar:3.8.4 as it is not available in the Mule Maven repository configured in your pom under <repositories>. This is the Public Mule repository, but it seems the 3.8.4 runtime and its dependencies were not made public, probably only available for Enterprise users. You can see for yourself by browsing the repository, the JAR is missing: https://repository-master.mulesoft.org/nexus/content/repositories/releases/org/mule/transports/mule-transport-file/3.8.4
You can either use Mule 3.8.1 for which your dependency is available (change Mule version in your pom) or configure the Enterprise (EE) repository if you have proper license and access (see https://docs.mulesoft.com/mule-user-guide/v/3.8/configuring-maven-to-work-with-mule-esb)
*Not related note: it seems you are running Mule EE inside Studio. Studio provide EE runtime for testing purposes, so Maven does not complain (too much) about missing EE dependencies, but if you try to run Mule EE outside Studio you will need to configure the EE repository. *

Update Setting.xml with Proxy details,if you are trying from organisation network, it seems it is not able to download all the jars

I am assuming it is your first project. You can disable Maven in order to experience MULE behavior. Right Click on the project and it provides an option to disable Maven. After that you can run your project.

Could not find goal 'devmode' in plugin org.codehaus.mojo

I am a beginner in GWT and Maven. I created a new GWT Application project in Eclipse. Then, I converted that project into Maven Project by right-click on Project name => Configure => Convert to Maven Project and I saw that a pom file was generated for that project. Next, I run as project as Maven build but it was not compiled since a goal was not specified there. Actually, I don't understand what exactly have I to write under that goal section, therefore, I wrote package under that and then again I built maven and it compiled successfully.
After that, I tried to run this maven project in Command Prompt on the SuperDevMode using the 2nd step mentioned on Run the GWT Project under the Setting up a new project section. But while following these steps on Command Prompt, I got an error that devmode could not be found. Here is my Command prompt log:
C:\Users\TEST>cd eclipse-workspace/MyWebApp
C:\Users\TEST\eclipse-workspace\MyWebApp>mvn war:exploded
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building MavenApp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-war-plugin:3.1.0:exploded (default-cli) # abcdef ---
[INFO] Exploding webapp
[INFO] Assembling webapp [abcdef] in [C:\Users\TEST\eclipse-workspace\MyWebApp\target\abcdef-0.0.1-SNAPSHOT]
[INFO] Processing war project
[INFO] Webapp assembled in [63 msecs]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.920 s
[INFO] Finished at: 2017-08-30T11:24:53+05:30
[INFO] Final Memory: 12M/107M
[INFO] ------------------------------------------------------------------------
C:\Users\TEST\eclipse-workspace\MyWebApp>mvn gwt:devmode
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.301 s
[INFO] Finished at: 2017-08-30T11:25:02+05:30
[INFO] Final Memory: 8M/107M
[INFO] ------------------------------------------------------------------------
[ERROR] Could not find goal 'devmode' in plugin org.codehaus.mojo:gwt-maven-plugin:2.8.1 among available goals clean, compile, compile-report, css, debug, eclipse, eclipseTest, generateAsync, help, i18n, mergewebxml, resources, run, run-codeserver, source-jar, test -> [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/MojoNotFoundException
Here is my pom.xml file:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>MyWebApp</groupId>
<artifactId>abcdef</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<testSourceDirectory>test</testSourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<name>MavenApp</name>
<description>It is a maven app</description>
</project>
I searched a lot to resolve this error but found no solution for that issue. Please help me to fix this issue as I am very confused on how to fix it.
Edit: After further study, I used mvn gwt:run as an alternative to the command mvn gwt:devmode, but still I got another error on command prompt as given below:
[ERROR] Failed to execute goal org.codehaus.mojo:gwt-maven-plugin:2.8.1:run (default-cli) on project MyWebApp: The parameters 'runTarget' for goal org.codehaus.mojo:gwt-maven-plugin:2.8.1:run are missing or invalid

Without any more information than gwt:devmode, Maven will try to find an appropriate plugin, based on its default settings. It happens that a gwt-maven-plugin exists with org.codehaus.mojo as groupId, fitting in Maven built-in plugin resolution.
But this is not the plugin you're looking for.
You are probably trying to use this one, so just add this to your pom.xml, in the <plugins> section:
<plugin>
<groupId>net.ltgt.gwt.maven</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>1.0-rc-8</version>
<extensions>true</extensions>
<configuration>
<moduleName>com.example.app.App</moduleName>
</configuration>
</plugin>
Adapting the moduleName if needed.

Well, I was able to solve this issue by copying some dependencies, plugin, and configuration from the pom.xml file (which is generated in the project created by the webAppCreator using maven) to the pom.xml file of my project created in the Eclipse. So, this is my pom.xml file created finally:
<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>MyPersonalProject</groupId>
<artifactId>MyPersonalProject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<!-- Setting maven.compiler.source to something different to 1.8
needs that you configure the sourceLevel in gwt-maven-plugin since
GWT compiler 2.8 requires 1.8 (see gwt-maven-plugin block below) -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!-- Don't let your Mac use a crazy non-standard encoding -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<dependencyManagement>
<dependencies>
<!-- ensure all GWT deps use the same version (unless overridden) -->
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt</artifactId>
<version>2.8.1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-servlet</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
<sourceDirectory>src</sourceDirectory>
<testSourceDirectory>test</testSourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>net.ltgt.gwt.maven</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>1.0-rc-6</version>
<executions>
<execution>
<goals>
<goal>import-sources</goal>
<goal>compile</goal>
<goal>import-test-sources</goal>
<goal>test</goal>
</goals>
</execution>
</executions>
<configuration>
<moduleName>mypackage.MyPersonalproject</moduleName>
<failOnError>true</failOnError>
<!-- GWT compiler 2.8 requires 1.8, hence define sourceLevel here if you use
a different source language for java compilation -->
<sourceLevel>1.8</sourceLevel>
<!-- Compiler configuration -->
<compilerArgs>
<!-- Ask GWT to create the Story of Your Compile (SOYC) (gwt:compile) -->
<arg>-compileReport</arg>
<arg>-XcompilerMetrics</arg>
</compilerArgs>
<!-- DevMode configuration -->
<warDir>${project.build.directory}/${project.build.finalName}</warDir>
<classpathScope>compile+runtime</classpathScope>
<!-- URL(s) that should be opened by DevMode (gwt:devmode). -->
<startupUrls>
<startupUrl>MyPersonalProject.html</startupUrl>
</startupUrls>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
When I run this application using maven in the Command Prompt, it ran successfully except showing 2 or 3 warnings in the Command Prompt log. Also, I noticed that the SNAPSHOT generated in the version is different for the pom.xml created by Eclipse as compared to the one created by the maven project on command prompt.

Spring-plugin build error

I have downloaded spring-plugin (https://github.com/spring-projects/spring-plugin). I have unpacked it and when trying to install it using maven (version 3.1.0) I am getting an error.
The original POM file is as follows:
<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework.plugin</groupId>
<artifactId>spring-plugin</artifactId>
<packaging>pom</packaging>
<name>Spring Plugin</name>
<version>1.1.0.BUILD-SNAPSHOT</version>
<description>Simple plugin infrastructure</description>
<organization>
<name>Pivotal, Inc.</name>
<url>http://www.springsource.org</url>
</organization>
<inceptionYear>2008</inceptionYear>
<url>https://github.com/SpringSource/spring-plugin</url>
<modules>
<module>core</module>
<module>metadata</module>
<module>integration</module>
</modules>
<properties>
<spring.version>3.2.7.RELEASE</spring.version>
<slf4j.version>1.7.5</slf4j.version>
</properties>
<developers>
<developer>
<id>gierke</id>
<name>Oliver Gierke</name>
<email>ogierke#gopivotal.com</email>
<url>http://www.olivergierke.de</url>
<organization>Pivtoal</organization>
<organizationUrl>http://www.gopivotal.com</organizationUrl>
<roles>
<role>Project lead</role>
</roles>
<timezone>+1</timezone>
</developer>
</developers>
<dependencies>
<!-- Common test dependencies -->
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.13</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<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</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.springsource.bundlor</groupId>
<artifactId>com.springsource.bundlor.maven</artifactId>
<version>1.0.0.RELEASE</version>
<executions>
<execution>
<id>bundlor</id>
<goals>
<goal>bundlor</goal>
</goals>
<phase>process-classes</phase>
</execution>
</executions>
<configuration>
<failOnWarnings>true</failOnWarnings>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<useDefaultManifestFile>true</useDefaultManifestFile>
</configuration>
</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>
</plugins>
</build>
<scm>
<url>https://github.com/spring-projects/spring-plugin</url>
<connection>scm:git:git://github.com/spring-projects/spring-plugin.git</connection>
<developerConnection>scm:git:ssh://git#github.com:spring-projects/spring-plugin.git</developerConnection>
</scm>
<ciManagement>
<system>Bamboo</system>
<url>https://build.springsource.org/browse/PLUGIN-MASTER</url>
</ciManagement>
<issueManagement>
<system>Github</system>
<url>https://github.com/spring-projects/spring-plugin/issues</url>
</issueManagement>
<repositories>
<repository>
<id>spring-libs-release</id>
<url>http://repo.spring.io/libs-release</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-plugins-release</id>
<url>http://repo.spring.io/plugins-release</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
I am trying to install it using the following command line
c:\myPathToSpringPlugin> mvn clean install
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] Spring Plugin
[INFO] Spring Plugin - Core
[INFO] Spring Plugin - Metadata Extension
[INFO] Spring Plugin - Spring Integration integration
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spring Plugin 1.1.0.BUILD-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://repo.spring.io/pluginsrelease/com/springsource/bundlor/com.springsource.bundlor.maven/1.0.0.RELEASE/com.springsource.bundlor.maven-1.0.0.RELEASE.pom
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Spring Plugin ..................................... FAILURE [21.581s]
[INFO] Spring Plugin - Core .............................. SKIPPED
[INFO] Spring Plugin - Metadata Extension ................ SKIPPED
[INFO] Spring Plugin - Spring Integration integration .... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 21.704s
[INFO] Finished at: Mon Apr 28 19:13:03 CEST 2014
[INFO] Final Memory: 8M/153M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin com.springsource.bundlor:com.springsource.bundlor.maven:1.0.0.RELEASE or one of its dependencies could not be resolved: Failed to read artifact descriptor for com.springsource.bundlor:com.springsource.bundlor.maven:jar:1.0.0.RELEASE: Could not transfer artifact com.springsource.bundlor:com.springsource.bundlor.maven:pom:1.0.0.RELEASE from/to spring-plugins-release (http://repo.spring.io/plugins-release): Connection to (MY PROXY) refused: Connection timed out: connect -> [Help 1]
[ERROR]
But if I sent a request using a web browser to the url
http://repo.spring.io/pluginsrelease/com/springsource/bundlor/com.springsource.bundlor.maven/1.0.0.RELEASE/com.springsource.bundlor.maven-1.0.0.RELEASE.pom
I am getting the POM file.
What can I do in order to get the spring-plugin up and running?

The fact that you see the pom, does not mean nothing...!
Reading the log, i think it's a simple connection error, the log say "connection refused by the proxy"... so maybe you have a proxy and have not configured (or maybe not configured in a correct way) the proxy setting inside the setting.xml..
Can you paste your setting.xml file....?

I tried downloading and building and it's working:
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Spring Plugin ..................................... SUCCESS [ 30.553 s]
[INFO] Spring Plugin - Core .............................. SUCCESS [ 9.290 s]
[INFO] Spring Plugin - Metadata Extension ................ SUCCESS [ 1.844 s]
[INFO] Spring Plugin - Spring Integration integration .... SUCCESS [ 9.929 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 51.837 s
[INFO] Finished at: 2014-04-29T00:52:23+07:00
[INFO] Final Memory: 22M/104M
[INFO] ------------------------------------------------------------------------
From your maven error:
from/to spring-plugins-release (http://repo.spring.io/plugins-release): Connection to (MY PROXY) refused: Connection timed out: connect -> [Help 1]
I think you're having a problem with the proxy!