[Java]Maven build failed on maven-javadoc-plugin:2.10.4:jar

Description

Hi folks,

I got an build error when trying to maven install codegen package:

Swagger-codegen version

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:2.10.4:jar
(attach-javadocs) on project Knowledge.EKG: Execution attach-javadocs of goal org.apache.maven.plugins:maven-javadoc-plugin:2.10.4:jar failed:

After googling, I tried different way to get rid of it.

1. remove .m2 folder
2. update JDK to latest(11)

However it's still complaining, anyone has any idea what's going on?

Swagger declaration file content or url

This is my Java config when executing jar

"hideGenerationTimestamp": "true",
"sortParamsByRequiredFlag": "true",
"ensureUniqueParams": "true", 
"allowUnicodeIdentifiers": "false",
"artifactVersion": "1.0.0",
"artifactDescription": "###",
"groupId": ###",
"artifactId": "###",
"modelPackage": "###",
"apiPackage": "###",
"invokerPackage" : "###",
"java8": "true",
"developerName": "###",
"developerEmail": "###",
"developerOrganization": "###",
"developerOrganizationUrl": "",
"fullJavaUtil": "false",
"dateLibrary": "java8",
"sourceFolder":  "###"

The block that cause failure in pom.xml

     <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-javadoc-plugin</artifactId>
            <version>2.10.4</version>
            <executions>
                <execution>
                    <id>attach-javadocs</id>
                    <goals>
                        <goal>jar</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

Start with the pom.xml block configuring org.apache.maven.plugins:maven-javadoc-plugin:2.10.4 and reproduce the maven install for the codegen package. The payload does not include the complete failure output or identify a repository file to change, so first determine the specific javadoc error and its scope. Done means establishing a reproducible build result and documenting or correcting the relevant Maven configuration.