```bash
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for com.jenkins.demo:jenkins_demo:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.2.6.RELEASE from/to aliyun-maven (http://maven.aliyun.com/nexus/content/groups/public): Transfer failed for http://maven.aliyun.com/nexus/content/groups/public/org/springframework/boot/spring-boot-starter-parent/2.2.6.RELEASE/spring-boot-starter-parent-2.2.6.RELEASE.pom and 'parent.relativePath' points at no local POM @ line 5, column 13
@
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project com.jenkins.demo:jenkins_demo:0.0.1-SNAPSHOT (/var/jenkins_home/workspace/chunuo_web_demo/pom.xml) has 1 error
[ERROR] Non-resolvable parent POM for com.jenkins.demo:jenkins_demo:0.0.1-SNAPSHOT: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:2.2.6.RELEASE from/to aliyun-maven (http://maven.aliyun.com/nexus/content/groups/public): Transfer failed for http://maven.aliyun.com/nexus/content/groups/public/org/springframework/boot/spring-boot-starter-parent/2.2.6.RELEASE/spring-boot-starter-parent-2.2.6.RELEASE.pom and 'parent.relativePath' points at no local POM @ line 5, column 13: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty -> [Help 2]
[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/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException
Build step 'Execute shell' marked build as failure
Finished: FAILURE
```
