Unknown lifecycle phase "mvn". You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>

Question

Getting this error while building the sprint boot application through eclipse.

[ERROR] Unknown lifecycle phase "mvn". You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1] [ERROR]  [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 

but working fine if i build through command prompt. Attaching the pom.xml below.

Pom.xml

<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.sarun</groupId>     <artifactId>SpringAngular</artifactId>     <version>0.0.1-SNAPSHOT</version>     <name> SpringDataRestAngular</name>     <description>Spring + AngularJS </description>      <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.1.3.RELEASE</version>         <relativePath /> <!-- lookup parent from repository -->     </parent>     <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-thymeleaf</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-data-jpa</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-data-rest</artifactId>         </dependency>         <!-- <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> -->          <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->         <dependency>             <groupId>org.postgresql</groupId>             <artifactId>postgresql</artifactId>             <version>9.3-1100-jdbc41</version>         </dependency>      </dependencies>      <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <start-class>com.programmingfree.springservice.Application</start-class>         <java.version>1.7</java.version>     </properties>      <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build> </project>