Maven Dependencies references non existing library

Question

As stated above I have a problem regarding maven. In my current eclipse project I used maven for dependecy management and it worked fine until now.

The project is not working anymore and it states that:

Maven Dependencies references non existing library: 
  c:\.m2\repository\org\eclipse\lyo\oslc4j\core\oslc4j-core\1.1\oslc4j-core-1.1.jar'

If i check the folder there are files that have the same name as the jar but end on jar.lastUpdated.

I tried maven clean and maven update which did not work. The line in my pom.xml is marked red and states:

Missing artifact org.eclipse.lyo.oslc4j.core:oslc4j-core:jar:1.1

This is the content of my pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http:/www.w3.org2001XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.or/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>rtc_oslc_common</groupId>
<artifactId>rtc_oslc_common</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
  <sourceDirectory>src</sourceDirectory>
  <plugins>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>2.3.2</version>
      <configuration>
        <source>1.6</source>
        <target>1.6</target>
      </configuration>
    </plugin>
  </plugins>
</build>

This block is the one with the marker where it states the artifact is missing.

<dependencies>
  <dependency>
    <groupId>org.eclipse.lyo.oslc4j.core</groupId>
    <artifactId>oslc4j-core</artifactId>
    <version>1.1</version>
  </dependency>
</dependencies>
</project>

I don't know why it is not just reloading the jars and instead stays in this weird state. Help very much appriaciated.

Answer 1

Basically Maven is telling you that it cannot find the dependency you declared in your pom.xml. The fact that there is a file called *.jar.lastUpdated means that Maven tried to download the dependency but wasn't able to fetch it.

First you could try to completely delete the folder containing the *.jar.lastUpdated and run the build again. Maven will then try to download the dependency again. Perhaps it was just a temporary error.

But as this dependency is not available in Maven Central, you may have to add the corresponding repository to your pom.xml.