javaeclipsemaven

Maven not downloading dependencies in Eclipse

I am setting up a project in eclipse . This projects builds successfully through command line(all mvn commands like mvn package, mvn compile, mvn clean install) work perfectly fine. While setting up this project on STS or Eclipse . I see some of the dependencies are not getting downloaded even though they are present in pom.xml. However, searching them in the maven repository and downloading the jar to my local computer and then adding them to build path makes it work on Eclipse.

Is there anything that we need to do to eclipse to make sure it downloads all the dependencies from the repository.

My POM:

<dependency>
    <groupId>org.apache.bookkeeper</groupId>
    <artifactId>bookkeeper-server-compat410</artifactId>
    <version>4.1.0</version>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.apache.bookkeeper</groupId>
            <artifactId>bookkeeper-server</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.apache.bookkeeper</groupId>
    <artifactId>bookkeeper-server-compat420</artifactId>
    <version>4.2.0</version>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.apache.bookkeeper</groupId>
            <artifactId>bookkeeper-server</artifactId>
        </exclusion>
    </exclusions>
</dependency>

Both these artifacts were not downloaded for eclipse and there jars found http://mvnrepository.com/artifact/org.apache.bookkeeper/bookkeeper-server-compat410/4.1.0 and http://mvnrepository.com/artifact/org.apache.bookkeeper/bookkeeper-server-compat420/4.2.0 were not present in the folder for MavenDependencies and were subsequently giving errors in Eclipse.

enter image description here

However manually adding them to the build path created a new folder (Reference Library) and resolved the Eclipse Errors . Why did Eclipse not download and import these dependencies by themselves from the maven repository ?? Is it a bug in Eclipse or some problem from my side . Please help.

enter image description here

Solution

  • Solution 1:

    Set correct proxy:

    <proxy>
    <id>optional</id>
    <active>false</active>
    <protocol>http</protocol>
    <username></username>
    <password></password>
    <host>172.27.171.91</host>
    <port>8080</port>
</proxy>

    Solution2 :

    just delete 

    lastupdated extension files from folder

    and try updating maven.

    [Most of the times this solution will work]