Non-parseable POM getting-started-java-master/pom.xml: Duplicated tag: 'build'

[monmouth]

Follow https://cloud.google.com/java/getting-started/hello-world, I try to build the hello-world example, but when I execute "mvn jetty:run-exploded" , I get the following error messages:

[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-parseable POM /tmp/getting-started-java-master/pom.xml: Duplicated tag: 'build' (position: START_TAG seen ...\n\n ... @176:12) @ /tmp/getting-started-java-master/pom.xml, line 176, column 12
@
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project com.example.flex.helloworld:helloworld-servlet:1.0-SNAPSHOT (/tmp/getting-started-java-master/helloworld-servlet/pom.xml) has 1 error
[ERROR] Non-parseable POM /tmp/getting-started-java-master/pom.xml: Duplicated tag: 'build' (position: START_TAG seen ...\n\n ... @176:12) @ /tmp/getting-started-java-master/pom.xml, line 176, column 12 -> [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/ModelParseException

I have maven 3.3.9、openjdk 1.8, not sure what's going on here ...

[monmouth]

I have found a way to solve this problem, just comment out line 115-131 of getting-started-java-master/pom.xml.

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