Failed to connect to MBean server at port 9001: Could not invoke shutdown operation:

Getting error on mvn clean install, trying to generate openapi.json for openAPI spec

[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.3.0.RELEASE:start (pre-integration-test) on project abcd: Cou ld not figure out if the application has started: Failed to connect to MBean server at port 9001: Could not invoke shutdown operation: Spring application did not start before the configured timeout (30000ms -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Using below configuration -

<dependency>
        <groupId>org.springdoc</groupId>
        <artifactId>springdoc-openapi-ui</artifactId>
        <version>1.4.4</version>
    </dependency>



<plugin>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-maven-plugin</artifactId>
            <version>1.0</version>
            <executions>
                <execution>
                    <id>integration-test</id>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <apiDocsUrl>http://localhost:8080/v3/api-docs</apiDocsUrl>
                <outputFileName>openapi.json</outputFileName>
                <outputDir>${project.build.directory}</outputDir>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <mainClass></mainClass>
            </configuration>
            <executions>
                <execution>
                    <id>pre-integration-test</id>
                    <goals>
                        <goal>start</goal>
                    </goals>
                </execution>
                <execution>
                    <id>post-integration-test</id>
                    <goals>
                        <goal>stop</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>