maven-javadoc-plugin 找不到 Spigot 包

Question

This is NOT a duplicate of this question . I am having trouble includding external dependencies to my Javadoc, which is not what that question is about.

I am trying to deploy my API to Maven Central. Everything is going smooth, except for the Maven Javadoc plugin. My API has two dependencies (Spigot API - org.spigotmc:spigot-api:1.19-R0.1-SNAPSHOT and JetBrains Annotations - org.jetbrains:annotations:23.0.0 ).
Running mvn clean deploy triggers the Javadoc plugin, which follows into a verbose error:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  7.253 s
[INFO] Finished at: 2022-07-14T20:10:43+05:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.4.0:jar (attach-javadocs) on project UnderscoreEnchantsAPI: MavenReportException: Error while generating Javadoc: 
[ERROR] Exit code: 1 - path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:3: error: package org.bukkit.entity does not exist
[ERROR] import org.bukkit.entity.Player;
[ERROR]                         ^
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:4: error: package org.bukkit.event does not exist
[ERROR] import org.bukkit.event.Cancellable;
[ERROR]                        ^
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:5: error: package org.bukkit.event does not exist
[ERROR] import org.bukkit.event.Event;
[ERROR]                        ^
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:6: error: package org.bukkit.event does not exist
[ERROR] import org.bukkit.event.HandlerList;
[ERROR]                        ^
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:7: error: package org.bukkit.inventory does not exist
[ERROR] import org.bukkit.inventory.ItemStack;
[ERROR]                            ^
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\EnchantmentsCombineEvent.java:8: error: package org.jetbrains.annotations does not exist
[ERROR] import org.jetbrains.annotations.NotNull;
[ERROR]                                 ^
... A LOT MORE ...
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\PreEnchantEvent.java:23: error: cannot find symbol
[ERROR]     public PreEnchantEvent(@NotNull Player player, @NotNull Enchantment enchantment, int level, @NotNull ItemStack item) {
[ERROR]                             ^
[ERROR]   symbol:   class NotNull
[ERROR]   location: class PreEnchantEvent
[ERROR] path\to\project\UnderscoreEnchantsAPI\src\main\java\com\roughlyunderscore\enchantsapi\events\PreEnchantEvent.java:23: error: cannot find symbol
[ERROR]     public PreEnchantEvent(@NotNull Player player, @NotNull Enchantment enchantment, int level, @NotNull ItemStack item) {
[ERROR]                                                     ^
[ERROR]   symbol:   class NotNull
[ERROR]   location: class PreEnchantEvent
[ERROR] 
[ERROR] Command line was: cmd.exe /X /C "path\to\jdks\.jdks\corretto-16.0.2\bin\javadoc.exe @options @packages @argfile"
[ERROR] 
[ERROR] Refer to the generated Javadoc files in 'path\to\project\UnderscoreEnchantsAPI\target\apidocs' dir.
[ERROR] 
[ERROR] -> [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

From what I pre-concluded, maven-javadoc-plugin does not see the dependencies that I have. Now, here is my pom.xml, or, actually, the parts that matter:

              <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <version>3.4.0</version>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <links>
                        <link>https://hub.spigotmc.org/javadocs/bukkit/</link>
                        <link>https://javadoc.io/doc/org.jetbrains/annotations-java5/23.0.0/</link>
                    </links>
                <!-- The links section does not seem to help! -->
                </configuration>
            </plugin>

      <repositories>
        <repository>
            <id>spigotmc-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
        </repository>
        <repository>
            <id>sonatype</id>
            <url>https://oss.sonatype.org/content/groups/public/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <version>1.19-R0.1-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.jetbrains</groupId>
            <artifactId>annotations</artifactId>
            <version>23.0.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

If for any reason at all you would like to see my full pom.xml, it's here . The full error can be found here . Any help is appreciated. This error has been bothering me for more than a week now and I couldn't seem to find any of such problems (many similar, but none that had this very problem). Any help is appreciated.

Edit: Adding <configuration><doclint>none</doclint></configuration> doesn't help.

Answer 1

I managed to resolve this problem by building the project against Java 1.8 and adding the following block into my pom.xml:

     <profiles>
        <profile>
            <id>doclint-java8-disable</id>
            <activation>
                <jdk>[1.8,)</jdk>
            </activation>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-javadoc-plugin</artifactId>
                        <version>3.4.0</version>
                        <configuration>
                            <links>
                                <link>https://hub.spigotmc.org/javadocs/bukkit/</link>
                                <link>https://javadoc.io/doc/org.jetbrains/annotations-java5/23.0.0/</link>
                            </links>
                            <additionalOptions>
                                <additionalOption>-Xdoclint:none</additionalOption>
                            </additionalOptions>
                        </configuration>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>

This is a hacky way, and I am still looking for a way to make it work on Java 16. Do suggest your ideas if you have any.