CODEWITHSUNDEEP
maven
Surasin Tancharoen
Surasin Tancharoen

Reputation: 5850

Maven: Why does my computer always download from http://repo1.maven.org?

I have two computers. One always downloads from http://repo1.maven.org. While another one downloads from http://repo.maven.apache.org.

Today, I got checksum error like this on the first computer.

[WARNING] Checksum validation failed, expected  but is 63801e851fe885601a0bd0eceb6501f7db37e47e for http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-archiver/1.0-alpha-6/plexus-archiver-1.0-alpha-6.pom

On the second computer, which is using http://repo.maven.apache.org working fine, no checksum errors.

I have been trying to change http://repo1.maven.org to http://repo.maven.apache.org but I cannot find where to change this.

I also wonder why different computers from same network got different repo to download and stuck with that repo forever.

Upvotes: 6

Views: 8634

Answers (2)

linski
linski

Reputation: 5094

Default locations of your settings files are:

There are two locations where a settings.xml file may live:

  • The Maven install: $M2_HOME/conf/settings.xml
  • A user's install: ${user.home}/.m2/settings.xml

M2_HOME is path to maven installation directory. The defaults can be found in the maven installation instructions:

  • win xp/2k: C:\Program Files\Apache Software Foundation\apache-maven-3.1.0
  • unix based: /usr/local/apache-maven/apache-maven-3.1.0

or open command prompt/terminal and type:

  • win xp/2k: echo %M2_HOME%
  • unix based: echo $M2_HOME

To change the location of your central repository its mirror can be defined. Open your settings.xml and add:

<settings>
 ...
<mirrors>
  <mirror>
     <id>myMirrorId</id>
     <name>mirror of a central repo</name>
     <url>http://server</url>
     <mirrorOf>central</mirrorOf>
  </mirror>
</mirrors>
 ...
</settings>

Now when running maven from your project root folder with the debug output (-X) you should see in the beggining of your console output:

[DEBUG] Using mirror myMirrorId (http://server) for central (http://repo.maven.apache.org/maven2).

The default central repo has id central and that's why that is the value of mirrorOf tag. My default central repo is the one you are trying to set.

I also wonder why different computers from same network got different repo to download.

If you comment everything in your user settings file (leave just the outer settings tags) and have default global settings file (which is basically empty) running:

mvn help:effective-settings

will dump practically empty settings. When building project maven still knows the location of the central repo, because every pom file inherits from the super pom and that is where the default central repo URL is defined:

<repositories>
    <repository>
        <id>central</id>
        <name>Central Repository</name>
        <url>http://repo.maven.apache.org/maven2</url>
        <layout>default</layout>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>

The super pom is located at $M2_HOME/lib/maven-model-builder-<VERSION>.jar under /org/apache/maven/model/pom-4.0.0.xml.

As Robert Scholte informed, as of 3.0.4 the default URL has been changed from http://repo1.maven.org/maven2 to http://repo.maven.apache.org/maven2

Upvotes: 4

Robert Scholte
Robert Scholte

Reputation: 12345

This was changed with Apache Maven 3.0.4, the related issue is MNG-5151

Upvotes: 6

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