backend
  parent-boot  << parent of all backend projects
    pom.xml
  service  << project to build
    pom.xml

<parent>
  <groupId>com.my.project</groupId>
  <artifactId>backend.root</artifactId>
  <version>0.0.1-SNAPSHOT</version> 
  <relativePath>../parent-boot</relativePath>
</parent>

Baue in Arbeitsbereich \\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.projectBaue in Arbeitsbereich \\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.project
The recommended git tool is: NONE
No credentials specified 
> git.exe rev-parse --resolve-git-dir \\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.project\.git # timeout=10
Fetching changes from the remote Git repository 
> git.exe config remote.origin.url E:\My_Repositories\com.my.project # timeout=10
Fetching upstream changes from E:\My_Repositories\com.my.project 
> git.exe --version # timeout=10 
> git --version # 'git version 2.22.0.windows.1' 
> git.exe fetch --tags --force --progress -- E:\My_Repositories\com.my.project +refs/heads/*:refs/remotes/origin/* # timeout=10
...
Parsing POMs
ERROR: POMs konnten nicht geparst werden
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[FATAL] Non-readable POM E:\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.project\backend\parent-boot\pom.xml: E:\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.project\backend\parent-boot\pom.xml (Das System kann den angegebenen Pfad nicht finden) @ E:\FILESERVER-01\Repositories\Jenkins_Workspace\MASTER - com.my.project\backend\parent-boot\pom.xml
 
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:397) 
at hudson.maven.MavenEmbedder.buildProjects(MavenEmbedder.java:370) 
at hudson.maven.MavenEmbedder.readProjects(MavenEmbedder.java:340) 
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1330) 
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1124) 
at hudson.FilePath.act(FilePath.java:1172) 
at hudson.FilePath.act(FilePath.java:1155) 
at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.parsePoms(MavenModuleSetBuild.java:985) 
at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:689) 
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:514) 
at hudson.model.Run.execute(Run.java:1888) 
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:543) 
at hudson.model.ResourceController.execute(ResourceController.java:99) 
at hudson.model.Executor.run(Executor.java:431)