我无法在Ubuntu-20.04上编译release-3.3--我得到下面的错误。我按照Thingsboard网站上的说明操作;从git下载了'release-3.3'源代码，然后运行'mvn clean install'。我做错什么了吗？？我可以跳过这一步吗（反正对Edge不感兴趣）。

Warning: Nashorn engine is planned to be removed from a future JDK release
2021-09-12 20:54:53,796 [main] ERROR o.t.s.s.edge.rpc.EdgeGrpcService - Failed to start Edge RPC server!
java.io.IOException: Failed to bind to address 0.0.0.0/0.0.0.0:7070
        at io.grpc.netty.shaded.io.grpc.netty.NettyServer.start(NettyServer.java:328)
        at io.grpc.internal.ServerImpl.start(ServerImpl.java:179)
        at io.grpc.internal.ServerImpl.start(ServerImpl.java:90)
..[skip over many statements similar to above]..
Caused by: io.grpc.netty.shaded.io.netty.channel.unix.Errors$NativeIoException: bind(..) failed: Address already in use
2021-09-12 20:54:53,796 [main] WARN  o.s.w.c.s.GenericWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adminController': Unsatisfied dependency expressed through field 'edgeGrpcService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'edgeGrpcService': Invocation of init method failed; nested exception is java.lang.RuntimeException: Failed to start Edge RPC server!
2021-09-12 20:54:53,813 [main] ERROR o.s.boot.SpringApplication - Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adminController': Unsatisfied dependency expressed through field 'edgeGrpcService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'edgeGrpcService': Invocation of init method failed; nested exception is java.lang.RuntimeException: Failed to start Edge RPC server!
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660)