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https://issues.apache.org/jira/browse/HADOOP-7035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated HADOOP-7035:
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Attachment: apicheck-hadoop-0.21.0-0.22.0-SNAPSHOT.txt
apicheck-hadoop-0.20.203.0-0.20.204.0.txt
I had a look at more compatibility testing tools, and found SigTest
(http://sigtest.java.net/), which is used by OpenJDK and NetBeans to check for
incompatible changes. It is very comprehensive and can check binary and source
compatibility.
I've written some scripts that allow two Hadoop tarballs to be compared for
incompatible API changes. The scripts are at
https://github.com/tomwhite/hadoop-compatibility-tools.
I've attached a couple of generated reports for the differences between
0.20.203 and 0.20.204, and between 0.21.0 and 0.22.0 (an old snapshot). It
would be good to generate the difference with 0.23.0 too, but that requires
HADOOP-7642. The reports can help highlight unwanted compatibilities and give
us a chance to fix them before release.
It would be nice to add such checks to patch testing so that incompatible
changes are flagged, but this can be tackled separately.
> Document incompatible API changes between releases
> --------------------------------------------------
>
> Key: HADOOP-7035
> URL: https://issues.apache.org/jira/browse/HADOOP-7035
> Project: Hadoop Common
> Issue Type: Improvement
> Components: documentation
> Reporter: Tom White
> Assignee: Tom White
> Priority: Blocker
> Fix For: 0.22.0
>
> Attachments: apicheck-hadoop-0.20.203.0-0.20.204.0.txt,
> apicheck-hadoop-0.21.0-0.22.0-SNAPSHOT.txt, jdiff-with-previous-release.sh,
> jdiff-with-previous-release.sh
>
>
> We can use JDiff to generate a list of incompatible changes for each release.
> See
> https://issues.apache.org/jira/browse/HADOOP-6668?focusedCommentId=12860017&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12860017
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