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Editorial Team
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Asked: 2026-05-19T23:16:22+00:00

I am very much outdated, but I have just upgraded my project to use

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I am very much outdated, but I have just upgraded my project to use JDK 1.5 from JDK 1.4, and now when running mvn javadoc:javadoc, I encounter the following javadoc warnings:

[WARNING] javadoc: warning - Multiple sources of package comments found for package "com.a"
[WARNING] javadoc: warning - Multiple sources of package comments found for package "com.b"
[WARNING] javadoc: warning - Multiple sources of package comments found for package "com.c"
[WARNING] javadoc: warning - Multiple sources of package comments found for package "com.a"

What do I need to do to fix them? Has anything changed from JDK 1.4 to 1.5?

Thanks!

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1 Answer

  1. Editorial Team

    (Updated 10 years after the original answer.)

    An old thread in the Oracle forums discussed this. (Unfortunately the link is broken now, and I can’t find the same thread in the new Oracle Developer community, nor in the Wayback machine).

    As far as I recall (and could gather from a bit of google-ing), the behavior of javadoc changed between JDK 1.4 and 1.5 so that a package documentation encountered multiple times creates this warning.
    This seems to have happened specifically with older versions of Maven – updating to a newer version of Maven (or the maven-javadoc-plugin) seems to have helped.

    (Of course, that meant a Maven version which was current in 2011, so any version you might have nowadays should be fine.)

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