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.

Solution

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.