问题
When I try to clean & build my Maven project I get the following error:
Errors occurred during the build.
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/project/MavenProject
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/project/MavenProject
similarly with the clean all process, it throws the following:
Errors occurred during the build.
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
loader constraint violation: loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) previously initiated loading for a different type with name "org/apache/maven/plugin/MojoExecution"
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Errors running builder 'Maven Project Builder' on project '(Hid Project Name)'.
org/apache/maven/plugin/MojoExecution
Any ideas what causes this?
回答1:
If you are using external maven check if that is selected
Also try deleting .m2 and check settings file over there if it is pointing to correct place in localRepository tag
C:\Users\sunny.m2\repository
来源：https://stackoverflow.com/questions/14691964/eclipse-juno-build-error-with-maven-project-builder