title: Non-resolvable import POM: Failure to transfer
body: <p>after checking out a java maven project, my pom has some errors all the time. maven clean and maven install work like a charm, but maven update project or download sources/java doc give me everytime the following error:</p>
  
  <pre><code>Could not download sources or javadoc
  Could not read maven project
  Some problems were encountered while processing the POMs:
  [ERROR] Non-resolvable import POM: Failure to transfer io.github.jhipster:jhipster-dependencies:pom:3.0.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact io.github.jhipster:jhipster-dependencies:pom:3.0.1 from/to central (https://repo.maven.apache.org/maven2): connect timed out @ line 106, column 16
  [ERROR] 'dependencies.dependency.version' for io.github.jhipster:jhipster-framework:jar is missing. @ line 118, column 15
  [ERROR] 'dependencies.dependency.version' for org.springframework.boot:spring-boot-starter-cache:jar is missing. @ line 123, column 15
  [ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-hibernate5:jar is missing. @ line 127, column 15
  [ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-hppc:jar is missing. @ line 131, column 15
  [ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar is missing. @ line 135, column 15
  [ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.module:jackson-module-afterburner:jar is missing. @ line 139, column 15
  [ERROR] 'dependencies.dependency.version' for com.h2database:h2:jar is missing. @ line 867, column 17
  [ERROR] 'dependencies.dependency.version' for com.jayway.jsonpath:json-path:jar is missing. @ line 148, column 15
  [ERROR] 'dependencies.dependency.version' for io.springfox:springfox-swagger2:jar is missing. @ line 154, column 15
  </code></pre>
  
  <p>Im behind a corporate proxy, which i already configured in eclipse. </p>
  
  <p>I had never anything to do with maven in my past, only checking worked for me every time.
  The project is set up with jHipster.</p>
  
  <p>Hope somebody can help me.</p>
  
  <p>Thanks in advance.</p>