Questions on Ground Rules

[Erik Trimble]

On 7/29/2011 10:26 AM, Jim Holmlund wrote:
> Hi Dalibor, a few questions
> - The two sentences in Rule 1 of the Ground Rules:
>       http://openjdk.java.net/projects/jdk7u/groundrules.html
>    seem almost contradictory to me.   If I have a change that is going 
> to go into both 7u and 8, it appears that I can push the fix to these 
> two repos in either order.  Is that true?
>
I do think something needs clarified here.  Firstly, the jdk8 and jdk7u 
forests are Mercurial Forks - there will be NO wholesale pulling/pushing 
between the two. All work will need to be pushed individually (I expect 
a fair amount of transplants, though) to each separate forest.


> - If there is an intent that a change destined for both 7u and 8 be 
> pushed into 8 first, how long must one wait after pushing to 8 before 
> pushing to 7u:
>    - not specified - the push to 7u could be done immediately after 
> the push to 8
>    - until after nightly tests are successfully run on the 8 
> integration repo to which the fix was pushed
>    - until the fix hits an 8 promoted build
>    - until the fix hits an 8 promoted build and promotion testing has 
> successfully been completed on that promoted build
>    - ??
>
We discussed this, and there's no Right Answer.  Generally speaking, 
push the fix into JDK8 first, and let it bake in QA for a bit (at least 
a night or so). Then push it to JDK7u (if applicable).  However, there 
will be fixes that may belong in ONLY one of the two versions - 
obviously, push directly to the correct JDK forest.  In a few cases, 
there will be issues that need to be addressed in JDK7u immediately, and 
can't wait for a JDK8 analysis/fix.

The "bake" time for a fix in JDK8 before pushing into JDK7 is 
subjective, and I don't think we have a good feel as to the correct 
solution.  To a certain extent, it's up to the developer responsible for 
the fix, as *that* developer will be responsible for pushing the fix 
independently to both forests.  My general feeling is that you should 
*always* wait until a successful Nightly Testing in JDK8 completed 
before pushing to JDK7u, and maybe waiting until a full JDK8 promotion 
is complete before pushing major fixes into JDK7.  Finally, build 
schedules will somewhat dictate how long a fix should bake before being 
transplanted.

Is that clear as mud?

:-)


-- 
Erik Trimble
Java Platform Group Infrastructure
Mailstop:  usca22-317
Phone:  x67195
Santa Clara, CA
Timezone: US/Pacific (UTC-0800)