Cannot create Maven Project in eclipse

Question

I have Eclipse Luna and Maven 3.2.3 installed on a Windows 7 machine behind a corporate firewall.

Trying to create a project from an archetype results in the following error:

Could not resolve archetype org.apache.maven.archetypes:maven-archetype-quickstart:RELEASE from any of the configured repositories.

Could not resolve artifact org.apache.maven.archetypes:maven-archetype-quickstart:pom:RELEASE

Failed to resolve version for org.apache.maven.archetypes:maven-archetype- quickstart:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-quickstart/maven-metadata.xml in local (C:\Users\xxxx.m2\repository)

Failed to resolve version for org.apache.maven.archetypes:maven-archetype-quickstart:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-quickstart/maven-metadata.xml in local (C:\Users\xxxx.m2\repository)

Proxy details are configured in .m2/settings.xml and generating a maven project from an archtype works fine in command line.

I tried to apply the solutions from here but none worked. The remote catalog is not acessible as well. I reckon it's a problem with the network settings of Eclipse. I also looked at this bug report to try and find some clues and couldn't really understand how to implement the workaround.

here is my settings.xml file:

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0                       http://maven.apache.org/xsd/settings-1.0.0.xsd">     <servers>         <server>             <id>nexus</id>             <username>[email protected]</username>             <password>{XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX}</password>         </server>         <server>             <id>deployment</id>             <username>[email protected]</username>             <password>{XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX}</password>         </server>     </servers>     <mirrors>         <mirror>         <!--This sends everything else to /public -->         <id>nexus</id>         <mirrorOf>*</mirrorOf>         <url>https://nexus-int.xxxx.xxxx.com/nexus/content/groups/public</url>         </mirror>     </mirrors>     <profiles>         <profile>         <id>nexus</id>             <!--Enable snapshots for the built in central repo to direct -->         <!--all requests to nexus via the mirror -->         <repositories>             <repository>                 <id>central</id>                 <url>http://central</url>                 <releases><enabled>true</enabled></releases>                 <snapshots><enabled>true</enabled></snapshots>             </repository>         </repositories>         <pluginRepositories>             <pluginRepository>                 <id>central</id>                 <url>http://central</url>                 <releases><enabled>true</enabled></releases>                 <snapshots><enabled>true</enabled></snapshots>             </pluginRepository>         </pluginRepositories>         </profile>     </profiles>     <activeProfiles>         <!--make the profile active all the time -->         <activeProfile>nexus</activeProfile>     </activeProfiles> </settings> 

Any ideas?

Thanks

Tomer

Answer 1

For me the solution was a bit simpler, I just had to clean the repository : .m2/repository/org/apache/maven/archetypes

Answer 2

Same problem here, solved.

I will explain the problem and the solution, to help others.

My software is:

Windows 7 Eclipse 4.4.1 (Luna SR1) m2e 1.5.0.20140606-0033     (from eclipse repository: http://download.eclipse.org/releases/luna) 

And I'm accessing internet through a proxy.

My problem was the same:

• Just installed m2e, went to menu: File > New > Other > Maven > Maven project > Next > Next.
• Selected "Catalog: All catalogs" and "Filter: maven-archetype-quickstart", then clicked on the search result, then on button Next.
• Then entered "Group Id: test_gr" and "Artifact Id: test_art", then clicked on Finish button.
• Got the "Could not resolve archetype..." error.

After a lot of try-and-error, and reading a lot of pages, I've finally found a solution to fix it. Some important points of the solution:

• It uses the default (embedded) Maven installation (3.2.1/1.5.0.20140605-2032) that comes with m2e.
• So no aditional (external) Maven installation is required.
• No special m2e config is required.

The solution is:

• Open eclipse.
• Restore m2e original preferences (if you changed any of them): Click on menu: Window > Preferences > Maven > Restore defaults. Do the same for all tree items under "Maven" item: Archetypes, Discovery, Errors/Warnings, Instalation, Lifecycle Mappings, Templates, User Interface, User Settings. Click on "OK" button.
• Copy (for example to a notepad window) the path of the user settings file. To see the path, click again on menu: Window > Preferences > Maven > User Settings, and the path is at the "User settings" textbox. You will have to write the path manually, since it is not posible to copy-and-paste. After coping the path to the notepad, don't close the Preferences window.
• At the Preferences window that is already open, click on the "open file" link. Close the Preferences window, and you will see the "settings.xml" file already openned in a Eclipse editor.
• The editor will have 2 tabs at the bottom: "Design" and "Source". Click on "Source" tab. You will see all the source code (xml).
• Delete all the source code: Click on the code, press control+a, press "del".
• Copy the following code to the editor (and customize the uppercased values):

<settings>   <proxies>    <proxy>       <active>true</active>       <protocol>http</protocol>       <host>YOUR.PROXY.IP.OR.NAME</host>       <port>YOUR PROXY PORT</port>       <username>YOUR PROXY USERNAME (OR EMPTY IF NOT REQUIRED)</username>       <password>YOUR PROXY PASSWORD (OR EMPTY IF NOT REQUIRED)</password>       <nonProxyHosts>YOUR PROXY EXCLUSION HOST LIST (OR EMPTY)</nonProxyHosts>     </proxy>   </proxies> </settings> 

• Save the file: control+s.
• Exit Eclipse: Menu File > Exit.
• Open in a Windows Explorer the path you copied (without the filename, just the path of directories).
• You will probaly see the xml file ("settings.xml") and a directoy ("repository"). Remove the directoy ("repository"): Right click > Delete > Yes.
• Start Eclipse.
• Now you will be able to create a maven project: File > New > Other > Maven > Maven project > Next > Next, select "Catalog: All catalogs" and "Filter: maven-archetype-quickstart", click on the search result, then on button Next, enter "Group Id: test_gr" and "Artifact Id: test_art", click on Finish button.

Finally, I would like to give a suggestion to m2e developers, to make config easier. After installing m2e from the internet (from a repository), m2e should check if Eclipse is using a proxy (Preferences > General > Network Connections). If Eclipse is using a proxy, the m2e should show a dialog to the user:

m2e has detected that Eclipse is using a proxy to access to the internet. Would you like me to create a User settings file (settings.xml) for the embedded  Maven software?  [ Yes ] [ No ] 

If the user clicks on Yes, then m2e should create automatically the "settings.xml" file by copying proxy values from Eclipse preferences.