Looking ahead: proposed Hg forest consolidation for JDK 10

[Joseph D. Darcy]

On 10/12/2016 8:52 AM, Jonathan Gibbons wrote:
>
> On 10/12/16 12:16 AM, Lindenmaier, Goetz wrote:
>
>>>> > >We find it difficult to keep the jtreg runner in sync with our
>>>> > >current version of jdk9, especially as we have two of them (We
>>>> > >test openJdk and SAP JVM 9, and within SAP JVM 9 hotspot and
>>>> > >jdk often differ in a few builds.)
>>>> > >I would appreciate if the runner could be included in the
>>>> > >root/test directory.
>>> >
>>> >I'm not quite sure what you are referring to by the jtreg runner.
>> I mean the code inhttp://hg.openjdk.java.net/code-tools/jtreg
>
> Goetz,
>
> What sort of troubles have you been having here?  The intent is to provide
> one version of jtreg that works for all supported JDK versions. Currently,
> the intent is that jtreg supports running tests on all versions back 
> to JDK 5.
>
> That being said, jtreg does advance slowly, and there is a value to 
> identify
> the minimum required version of jtreg in the test/TEST.ROOT file for each
> repository that contains jtreg tests. If nothing else, you could use 
> that value
> to help select a specific version of jtreg, assuming you build/provide
> multiple versions.
>
> I do accept that folk working on the jigsaw/jake forest will sometimes 
> have
> to use the latest version of jtreg (i.e. tip, not the latest tagged 
> version) but
> that is part of living and working on "the bleeding edge", and which does
> not sound like your situation.
>
> In short, I think the cost of the logistics to keep jtreg in the main 
> JDK forest,
> including the need to backport changes, would far outweigh any benefits,
> especially when there is related concern about the overall size of an 
> aggregate
> consolidated repo.
>

I agree with Jon that it is strongly preferable to have jtreg be 
separate from any particular JDK release since it can be shared among 
multiple release trains and the development cycle of jtreg is not 
fundamentally tied to the development cycle of a particular JDK release 
(although many recent jtreg features have been in support of Jigsaw in 9).

Cheers,

-Joe