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https://issues.apache.org/jira/browse/HADOOP-18751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17736929#comment-17736929
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ASF GitHub Bot commented on HADOOP-18751:
-----------------------------------------
GauthamBanasandra commented on PR #5688:
URL: https://github.com/apache/hadoop/pull/5688#issuecomment-1606269212
@ayushtkn , @goiri it seems like the issue that
[HADOOP-8500](https://issues.apache.org/jira/browse/HADOOP-8500) and
[HADOOP-13784](https://issues.apache.org/jira/browse/HADOOP-13784) aimed to fix
isn't really solved. I'm finding that the javadocs are still lying under the
`site` directory -
This is happening since the `destDir` is appended to `reportOutputDirectory`
as the `maven-javadoc-plugin` documentation calls out.
Upon using `../api` the javadoc generation fails on Linux since the parent
`site` directory doesn't exist -
However, the same works absolutely fine on Windows. I've thus used the same
approach to fix the issue on Windows and have kept the `destDir` intact for
Linux. Unfortunately, the `maven-javadoc-plugin` doesn't give us a way to
handle this scenario. ☹️
We'll have to pursue the correct fix for Linux separately.
> Fix incorrect output path in javadoc build phase
> ------------------------------------------------
>
> Key: HADOOP-18751
> URL: https://issues.apache.org/jira/browse/HADOOP-18751
> Project: Hadoop Common
> Issue Type: Bug
> Components: build
> Affects Versions: 3.4.0
> Environment: All
> Reporter: Gautham Banasandra
> Assignee: Gautham Banasandra
> Priority: Critical
> Labels: pull-request-available
>
> The javadoc build phase fails with the following error -
> {code}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:javadoc-no-fork
> (default-cli) on project hadoop-common: An error has occurred in Javadoc
> report generation: Unable to write 'options' temporary file for command
> execution:
> H:\hadoop-common-project\hadoop-common\target\site\H:\hadoop-common-project\hadoop-common\target\api\options
> (The filename, directory name, or volume label syntax is incorrect) -> [Help
> 1]
> {code}
> As called out by the error message the path
> *H:\hadoop-common-project\hadoop-common\target\site\H:\hadoop-common-project\hadoop-common\target\api\options*
> is invalid.
> The culprit being -
> https://github.com/apache/hadoop/blob/e9740cb17aef157a615dc36ae08cd224ce1672f0/hadoop-project-dist/pom.xml#L109
> {code}
> <reportOutputDirectory>${project.build.directory}/site</reportOutputDirectory>
> <destDir>${project.build.directory}/api</destDir>
> {code}
> As per the [docs from
> maven-javadoc-plugin|https://maven.apache.org/plugins/maven-javadoc-plugin/examples/output-configuration.html],
> *destDir* attribute's value gets appended to that of
> *reportOutputDirectory*. This implies that *destDir* must be a relative path,
> although not called out in the documentation. Since this isn't the case here,
> # In Linux, this yields an unintended path (albeit a valid one) and doesn't
> fail.
> # In Windows, it yields an incorrect path and thus fails since there's a
> colon ( : ) for the drive letter in the middle of the incorrectly
> concatenated path -
> H:\hadoop-common-project\hadoop-common\target\site\H {color:red}*:*{color}
> \hadoop-common-project\hadoop-common\target\api\options
> Thus, fixing this would fix the build failure on Windows and put the docs in
> the appropriate directory in Linux.
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