Planning Council/September 07 2011
- 1 Logistics
- 2 Members and Attendees
- 3 Announcements
- 4 Indigo SR1
- 5 Indigo Retrospective
- 6 Juno Requirements
- 7 Next Meeting
- 8 Reference
|Meeting Title:||Planning Council Conference Call|
|Date & Time:||Wednesday, September 07, 2011, at 1200 Eastern|
|Dial-in:||For the call-in numbers, see the "Project Review" number on Foundation Portal page.|
Members and Attendees
Note: "Inactive" refers to Strategic Members we have not heard from in a year or so, and have been unable to convince to participate. Those members can become active again at any time. Contact David Williams if questions.
Note: feel free to correct any errors/omissions in above attendance record.
Y = Yes, attended
N = No, did not
R = regrets sent ahead of time
X = not expected
What to do about breaking changes?
Achim: We discovered an issue where a change in Equinox broke EclipseLink for Jubula Bugzilla. We filed this bug which is a showstopper for us shortly after RC1 and the fix will be in RC4. This leaves us with very little time to do any testing on the release (Of course we've tested this on internal builds but the RCs where not testable). What is the recommended way to deal with this? We could have fixed this for the EPP packages by using specific versions of Equinox and/or EclipseLink but that would still leave the feature in the repo unusable.
- davidw: I think you handled it in the best way possible. First, opening the bug, and second, drawing attention to it via your post to cross-project list. If you are asking if there is a way to extend the schedule for extra time for testing, I'd say "no", we seldom have (never, so far), and this case doesn't seem to need it. If you are asking if there is an "escalation path", I'd also say "no" (there is, if you feel you were being treated unfairly according to Eclipse by-laws, but "technical issues" would seldom qualify). In other words, "support" needs to be worked out between projects, and there is no absolute, perfect, guarantee of support. In general, there is certainly every intent to avoid breaking others, and from reading the bug report, it sounds like there were two known paths forward (fix the EclipseLink code, or the Equinox fix could have been backed out until later). If you want to scold the Equinox team for making a breaking change in behaviour ... consider is done! :) I do sympathize with them for this case though, as it is a difficult case to deal with ... where the API behaviour is implemented wrong, according to its documented contract, so in fixing that bug, it is discovered someone was accidentally depending on the incorrect behaviour. We must be able to "fix API behaviour" but, granted, it is risky to do so in a maintenance release and this case serves as an excellent reminder to all teams to use great care in doing that. All in all, this issue actually has an excellent outcome, thanks to you and your teams testing early, and thanks to Tom Watson and Tom Ware getting the fix in time for SR1. In other, cases, if had been found too late, shortly after the Service Release, it would have been impossible to "back out" the change, and would have only left out the option of someone producing a patch to apply after the fact. So, thank you for finding and thank you for drawing our attention to it.
- achim: Just to make this clear: we don't blame any project at all. It was okay for the Equinox team to fix a problem in their API and the EclipseLink team responded equally well. Since the fix will be in RC3 we don't have a problem in testing the release, so all changed for the good. Our heart rate is back close to normal:-) I still don't know what would have happened if the issue had not been resolved. Is it possible to "skip" a service release in this case? Delivering a non-working feature/package obviously can't be a valid solution.
We could not come up with general solution that would fit all cases (after all, it is an exception, and hard to anticipate all possibilities for exceptions) but "skipping a service release" could be one drastic solution. A less drastic solution would have been to back out the original fix ... as a general rule (after I have just said there were not any :) ... is that "status quo" usually trumps "fixes" (that is, better to have the original bug, until a better fix can be made, if a fix causes a worse regression). The take-away message from this experience, though, that pretty much any blocking problem can be solved, due to the commitment and skills of Eclipse committers. It has happened several times over the years. Thanks for reporting, thanks for fixing, and thanks for the discussion.
Tweak future SR drop windows?
Should we tweak schedule for SR2 (and future maintenance releases)? So weekly rhythm is same for maintenance as release? Namely, instead of Monday (+0) to Friday, have Friday (+0) to Friday?
There were no objections during meeting, and I checked with John and Kim for Platform, and they said "fine". I will change calendar, plan, and announce to cross-project list after SR1 (to avoid confusion or churn during SR1).
Is there an issue with pack.gz files?
I've not understood the the implications of the cross-project thread on this topic ... does anyone else? Is there something to fix or solve?
- I opened bug 356931. Does seem an issue, but does not seem to be a regression.
Any other issues?
Ed gave a "heads up" that gmf-tooling might try a release and be a "new addition" for SR1 ... as long as they fulfil the normal release and SR requirements (such as signed jars, etc.) this is within our policy. (but, getting pretty late!) Ed said there were no direct dependencies in Indigo stack, so no risk of breaking others (famous last words :)
Primary purpose is to brainstorm; to capture good and bad aspects of Indigo Simultaneous Release. While we want items to be actionable, we do not want to "judge" or get distracted by finding solutions, in this initial meeting.
We'll capture notes in Planning Council/Indigo_retrospective.
Before the meeting, please review last year's notes.
Useful discussion. See Planning Council/Indigo_retrospective for notes I captured.
Support for Eclipse 3.8 workbench
We will have 4.2 as primary (hence the one used for EPP Packages) but ask participating projects to have a clear plan item titled, exactly, "Support for Eclipse 3.8 workbench" where possible descriptions might be similar to:
- Not at all. No support for 3.8 based apps.
- We will accept bugs against 3.8 based apps, but do not test or compile against it.
- We will compile against and somewhat test 3.8, though 4.2 is primary.
- We will support 3.8 as well as 4.2, but the exact functionality may differ.
- We will support 3.8 and 4.2 equally.
Good discussion with Modelling Rep (i.e. Ed). He did feel sort of obligated to support 3.8, since he knows it would "short circuit" a whole stack of plans, if not. So, he'll look into what it'd take, at least from a releng/build point of view (and, will likely depend on consumers to test one of the stacks). He thinks they can do it with "one stream", but the issue for them is their prereq versioning ranges. They currently set ranges automatically during builds ... at least for lower bound ... setting the lower bound to be equal to what they build against, so, first impression, is they could build against 3.8 and that be used for both 3.8 and 4.2 stacks. Apparently upper level is "set" to be 5.0, or similar? Thanks for the insights.
- October 5, 2011 (our regular "first Wednesday" meeting, at Noon Eastern).