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https://issues.apache.org/jira/browse/HDFS-11096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16143965#comment-16143965
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Sean Mackrory edited comment on HDFS-11096 at 8/28/17 4:40 PM:
---------------------------------------------------------------
So Docker support has been added for the rolling-upgrade and pull-over-http
test. They're using the same Docker image as Yetus builds, etc. And they've
been really robust lately. I've corrected the copyright headers at the top of
the files, and I think dev-support/compat is a good place for these tests to
live - but I'm open to other ideas as well. I've also added to the README - now
that the scripts spin up the clusters on Docker, it's *really* easy to run
these.
The Python tests are all still working, but they did not seem to catch the
previous incompatibility that prevented older clients from writing to newer
DataNodes. There's also still a few TODOs or thing that don't work and it's not
clear why. So definitely more work to be done, but there's value in the
existing CLI compatibility tests.
I'd like to get this put in the codebase and get some Jenkins jobs running on
it soon.
was (Author: mackrorysd):
So Docker support has been added for the rolling-upgrade and pull-over-http
test. They're using the same Docker image as Yetus builds, etc. And they've
been really robust lately. I've corrected the copyright headers at the top of
the files, and I think dev-support/compat is a good place for these tests to
live - but I'm open to other ideas as well.
The Python tests are all still working, but they did not seem to catch the
previous incompatibility that prevented older clients from writing to newer
DataNodes. There's also still a few TODOs or thing that don't work and it's not
clear why. So definitely more work to be done, but there's value in the
existing CLI compatibility tests.
I'd like to get this put in the codebase and get some Jenkins jobs running on
it soon.
> Support rolling upgrade between 2.x and 3.x
> -------------------------------------------
>
> Key: HDFS-11096
> URL: https://issues.apache.org/jira/browse/HDFS-11096
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: rolling upgrades
> Affects Versions: 3.0.0-alpha1
> Reporter: Andrew Wang
> Assignee: Sean Mackrory
> Priority: Blocker
> Attachments: HDFS-11096.001.patch
>
>
> trunk has a minimum software version of 3.0.0-alpha1. This means we can't
> rolling upgrade between branch-2 and trunk.
> This is a showstopper for large deployments. Unless there are very compelling
> reasons to break compatibility, let's restore the ability to rolling upgrade
> to 3.x releases.
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