Menu
I’m using Maven 3.1.1. In one of my projects, I reference another one of my projects …
<dependencies> <dependency> <groupId>org.mainco.subco</groupId> <artifactId>myprojectA</artifactId> <version>${project.version}</version> </dependency> The above is dependent on a couple other of my projects. However, when I run “mvn clean install,” Maven attempts to download these artifacts instead of just using what’s in my local repository. How do I get Maven to only download things if they do not exist in my local repository? Here’s the output of what I’m seeing …
davea$ mvn clean install [INFO] Scanning for projects... [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building subco admin Module 57.0.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ Downloading: http://download.java.net/maven/2/org/mainco/subco/myprojectA/57.0.0-SNAPSHOT/maven-metadata.xml Downloading: http://download.java.net/maven/2/org/mainco/subco/subco/57.0.0-SNAPSHOT/maven-metadata.xml Downloading: http://download.java.net/maven/2/org/mainco/subco/projectB/57.0.0-SNAPSHOT/maven-metadata.xml Downloading: http://download.java.net/maven/2/org/mainco/subco/projectC/57.0.0-SNAPSHOT/maven-metadata.xml [INFO] 
639
Maven does this because your dependency is in a SNAPSHOT version and maven has no way to detect any changes made to that snapshot version in the repository. Release your artifact and change the version in pom. xml to that version and maven will no longer fetch the metadata file.
If the dependency has its own dependencies they will be downloaded as well. This concept is known as "transitive dependency". Now, in order to "fill" the local repo maven has to download the jars to your local hard drive, that's why you see that it downloads a lot of stuff.
the local repository is a directory on the computer where Maven runs. It caches remote downloads and contains temporary build artifacts that you have not yet released.
An artifact is apparently a directory satisfying some constraints, e.g. it must contain a file called maven-metadata. xml and a file called <artifactId>-<version>. pom .
If you use offline flag it will use your libraries from local repo.
mvn clean install -o You may control the update frequency by configuring repositories in the $USER_HOME/.m2/settings.xml file. Specifically, change the updatePolicy to a value that results in less frequent updates.
This Stackoverflow answer has more detail.
36
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
