(replies inline)

On Fri, 04 Jan 2019, Devin Nusbaum wrote:

> Good question!
> 
> > ??? I believe this means that only runtime
> > persistence for running Pipelines has changed, and none of the previously
> > existing on-disk state for Pipeline Runs will change. Would that be correct?
> 
> Yes, the format of build data for completed Pipelines is unchanged, so 
> you???ll
> still be able to access old Pipelines inside of Jenkins after the upgrade.


Thanks for the clarifications Devin


> To get into the details a bit, the file whose format has changed is 
> `program.dat`,
> which stores the Pipeline program and is used to maintain control flow across
> restarts. If you don???t stop a Pipeline during the restart, then after 
> restarting, 
> Jenkins won???t be able to deserialize `program.dat` back into the original
> Pipeline program, so the build will fail. Once a Pipeline completes,
> `program.dat` is deleted, hence the recommendation to wait for running
> Pipelines to complete or to stop them manually if having running Pipelines 
> fail
> after the restart would be a problem for your Jenkins installation.
> 
> Hopefully that answers your question, but please let me know if there is 
> anything else I can clarify in regards to the upgrade. Any suggestions to 
> improve the changelog warning are also welcome.
> 
> Thanks,
> Devin
> 
> > On Jan 4, 2019, at 14:59, R. Tyler Croy <[email protected]> wrote:
> > 
> > While considering upgrades for ci.jenkins.io, I see that workflow-support is
> > now the first Pipeline-related plugin to arrive at 3.0 
> > (https://plugins.jenkins.io/workflow-support).
> > Hooray! Thanks for the work dnusbaum :)
> > 
> > From the changelog:
> > 
> >    This update involves incompatible changes to the serialized format of
> >    Pipeline builds. Any Pipelines that are running when Jenkins is restarted
> >    to apply this upgrade will fail after the restart. Pipelines will be able
> >    to resume normally after subsequent restarts.
> > 
> >    To avoid this one-time issue, please stop all running Pipelines or allow
> >    them to complete before restarting Jenkins when applying this update.
> > 
> > 
> > Since there's a marshalling change going on, I wanted to double check my
> > understanding of this change.  I believe this means that only runtime
> > persistence for running Pipelines has changed, and none of the previously
> > existing on-disk state for Pipeline Runs will change. Would that be correct?
> > 
> > 
> > I'm personally a bit weary of seralization changes, which have bitten me in 
> > the
> > past, but if this is just about runtime data and no longer term persisted
> > information, then I'll happily upgrade post haste! :)
> > 
> > 
> > 
> > Cheers
> > --
> > GitHub:  https://github.com/rtyler
> > 
> > GPG Key ID: 0F2298A980EE31ACCA0A7825E5C92681BEF6CEA2
> > 
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