Maven embedder: Compiler dependency could not be resolved - No connector factories available

Question

I have maven projects A and B. Project A uses maven embedder 3.2.5 and builds with it project B.

MavenCli mavenCli = new MavenCli();
mavenCli.doMain(new String[] {"package"}, "C:\\Users\\JohnDoe\\Desktop\\abc", System.out, System.out);

But I get the exception:

Plugin org.apache.maven.plugins:maven-compiler-plugin:3.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:3.1: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.1 from/to central (https://repo.maven.apache.org/maven2): No connector factories available

I looked into my local repository folder and there is indeed no plugin version 3.1. If I manually put it there the build is successful. But AFAIK maven automatically should download all necessary plugins. But it doesn't happen.

Answer 1

Adding these dependencies solved my problem

 <dependency>
  <groupId>org.eclipse.aether</groupId>
  <artifactId>aether-connector-basic</artifactId>
  <version>1.0.2.v20150114</version>
</dependency>
<dependency>
  <groupId>org.eclipse.aether</groupId>
  <artifactId>aether-transport-wagon</artifactId>
  <version>1.0.2.v20150114</version>
</dependency>
<dependency>
  <groupId>org.apache.maven.wagon</groupId>
  <artifactId>wagon-http</artifactId>
  <version>2.8</version>
  </dependency>
<dependency>
  <groupId>org.apache.maven.wagon</groupId>
  <artifactId>wagon-provider-api</artifactId>
  <version>2.8</version>
</dependency>