org/apache/maven/cli/mavencli:unsupported Major.minor version 51.0

This error was reported when launching an open source project.

And then I'm going to add the sudo execution

And then it came up. java.lang.unsupportedclassversionerror:org/apache/maven/cli/mavencli:unsupported Major.minor version 51.0

Online viewing is due to the inconsistency between Maven and JDK version.

But use Mvn-v to see if the discovery is a match.

Finally asked a big brother to help me to solve, here express very grateful.

Ordinary users under the Mac can only use more than 1024 ports, the above ["http-nio-80"] using the port number is 80, so there will be no permissions.

Then sudo runs, to read the root user environment variables, not read the current user's environment variables, resulting in MVN and JDK version inconsistency, this enlightened.