Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.0:shade (default) on project QMServer: Execution default of goal org.apache.maven.plugins:maven-shade-plugin:2.0:shade failed: A required class was missing while executing org.apache.maven.plugins:maven-shade-plugin:2.0:shade: org/sonatype/aether/graph/DependencyNode
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使用eclipse 的Maven 在构建的时候出现这个错，可能是eclipse里的maven插件的版本更新之后，相应的POM.xml文件没有更新，只需要把version里的版本升高就行了。我升到了2.1.当然如果你的eclipse里的maven插件版本不是最新的，但是却用了最新的POM.xml,也是有可能造成这些错误的，反正调节版本就OK了
????????????<plugin>
????????????????<groupId>org.apache.maven.plugins</groupId>
????????????????<artifactId>maven-shade-plugin</artifactId>
????????????????<version>2.0</version>（我在这里把2.0改为了2.1）
????????????????<executions>
????????????????????<execution>
????????????????????????<phase>package</phase>
????????????????????????<goals>
????????????????????????????<goal>shade</goal>
????????????????????????</goals>
????????????????????????<configuration>
????????????????????????????<transformers>
????????????????????????????????<transformer
????????????---
????????????????????????????????</transformer>
????????????????????????????</transformers>
????????????????????????</configuration>
????????????????????</execution>
????????????????</executions>
????????????</plugin>