[MJAVADOC-684] maven-javadoc and reproducible builds

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.1
• Component/s: javadoc

Environment

Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)
Maven home: /opt/maven
Java version: 11.0.11, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-77-generic", arch: "amd64", family: "unix"

• Assignee: Herve Boutemy
• Reporter: Maxim Solodovnik
• Created: 17/Jul/21 16:23
• Updated: 05/Sep/21 08:31
• Resolved: 24/Jul/21 10:16

Description

I'm a bit confused with documentation
 
This [1] guide instruct me to set

    <project.build.outputTimestamp>1</project.build.outputTimestamp>

and add 

    <notimestamp>true</notimestamp>

to javadoc configuration in pluginManagement
 
as a result I'm getting
 

Caused by: java.time.format.DateTimeParseException: Text '1' could not be parsed at index 0
    at java.time.format.DateTimeFormatter.parseResolved0 (DateTimeFormatter.java:2046)
    at java.time.format.DateTimeFormatter.parse (DateTimeFormatter.java:1874)
    at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.getBottomText (AbstractJavadocMojo.java:3007)
    at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.addStandardDocletOptions (AbstractJavadocMojo.java:5549)

 
and this seems to be "by design" [2]:
 
Shall I specify some additional custom property? (bottom?)
or maybe outputTimestamp should be set to some other value?
 
and documentation definitely need to be updated ((
 
[1] https://maven.apache.org/guides/mini/guide-reproducible-builds.html
[2] https://github.com/apache/maven-javadoc-plugin/blob/master/src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java#L3004
 

Issue Links

• causes: SLING-10744 Generating Javadoc with parent 44 fails
• causes: SLING-10702 Update Maven Javadoc Plugin to 3.3.1
• is caused by: MJAVADOC-619 Maven Javadoc bottom claims copyright for future years
• is related to: SLING-10672 Document required settings for reproducible builds
• is required by: MPOM-267 upgrade maven-javadoc-plugin to 3.3.2