When I run mvn clean it's wrong - maven

Question

When I use maven scope import import the dependency get the cycle
[ERROR] The project
com.example:websocket-dependencies:0.0.1-SNAPSHOT
(D:\code_local\fmt\websocket\websocket-dependencies\pom.xml) has 1
error [ERROR] The dependencies of type=pom and with scope=import
form a cycle: com.example:websocket-dependencies:0.0.1-SNAPSHOT ->
com.example:websocket-dependencies:0.0.1-SNAPSHOT
the pom.xml is that:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>websocket</artifactId>
<version>0.0.1-SNAPSHOT</version>
<modules>
<module>web</module>
<module>websocket-dependencies</module>
<module>entity</module>
</modules>
<packaging>pom</packaging>
<name>websocket</name>
<description>Demo project for Spring Boot</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<maven-compiler-plugin.version>3.6.1</maven-compiler-plugin.version>
<spring.boot.verison>1.5.9.RELEASE</spring.boot.verison>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.verison}</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.example</groupId>
<artifactId>websocket-dependencies</artifactId>
<version>${project.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>dev</id>
<properties>
<env>dev</env>
</properties>
</profile>
<profile>
<id>test</id>
<properties>
<env>test</env>
</properties>
</profile>
<profile>
<id>prod</id>
<properties>
<env>prod</env>
</properties>
</profile>
</profiles>
</project>
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>websocket</artifactId>
<groupId>com.example</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>websocket-dependencies</artifactId>
<packaging>pom</packaging>
<name>websocket-dependencies</name>
<description>websocket-dependencies</description>
<properties>
</properties>
<dependencyManagement>
<dependencies>
</dependencies>
</dependencyManagement>
<profiles>
</profiles>
</project>
When I run mvn clean -x it get the error detail:
[INFO] Error stacktraces are turned on.
[WARNING]
[WARNING] Some problems were encountered while building the effective settings
[WARNING] Unrecognised tag: 'mirror' (position: START_TAG seen ...he preferred\n | server for that repository.\n |-->\n <mirror>... #146:13) # D:\soft\apache-maven-3.3.9\conf\settings.xml, line 146, column 13
[WARNING]
[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[WARNING] 'build.plugins.plugin.version' for org.springframework.boot:spring-boot-maven-plugin is missing. # com.example:websocket:0.0.1-SNAPSHOT, D:\code_local\fmt\websocket\pom.xml, line 52, column 21
[ERROR] Non-resolvable import POM: Could not find artifact com.example:websocket-dependencies:pom:0.0.1-SNAPSHOT # com.example:websocket:0.0.1-SNAPSHOT, D:\code_local\fmt\websocket\pom.xml, line 38, column 25
#
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[WARNING] 'build.plugins.plugin.version' for org.springframework.boot:spring-boot-maven-plugin is missing. # com.example:websocket:0.0.1-SNAPSHOT, D:\code_local\fmt\websocket\pom.xml, line 52, column 21
[ERROR] Non-resolvable import POM: Could not find artifact com.example:websocket-dependencies:pom:0.0.1-SNAPSHOT # com.example:websocket:0.0.1-SNAPSHOT, D:\code_local\fmt\websocket\pom.xml, line 38, column 25
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:422)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects(DefaultGraphBuilder.java:419)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor(DefaultGraphBuilder.java:410)
at org.apache.maven.graph.DefaultGraphBuilder.build(DefaultGraphBuilder.java:83)
at org.apache.maven.DefaultMaven.buildGraph(DefaultMaven.java:491)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:219)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR]
[ERROR] The project com.example:web:0.0.1-SNAPSHOT (D:\code_local\fmt\websocket\web\pom.xml) has 1 error
[ERROR] Non-resolvable import POM: Could not find artifact com.example:websocket-dependencies:pom:0.0.1-SNAPSHOT # com.example:websocket:0.0.1-SNAPSHOT, D:\code_local\fmt\websocket\pom.xml, line 38, column 25 -> [Help 2]
org.apache.maven.model.resolution.UnresolvableModelException: Could not find artifact com.example:websocket-dependencies:pom:0.0.1-SNAPSHOT
at org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:197)
at org.apache.maven.model.building.DefaultModelBuilder.importDependencyManagement(DefaultModelBuilder.java:1192)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:455)

Answer 1

You have a typo in D:\soft\apache-maven-3.3.9\conf\settings.xml, line 146, column 13.
In this way maven, most probably, is not able to resolve your websocket-dependencies dependency.
Maybe fixing the settings.xml will solve the cycle.