One more comment about the consequences of this PR, as pointed out in the comments on Github: this will also break direct compatibility for the CEP library between Flink 1.2 and 1.4. There is still a way to migrate via Flink 1.3: Flink 1.1/2 -> savepoint -> Flink 1.3 -> savepoint -> Flink 1.4.
> Am 16.08.2017 um 17:31 schrieb Stefan Richter <s.rich...@data-artisans.com>: > > Hi, > > after there have been no objections since a long time, I took the next step > and created a PR that implements this change in commit > 95e44099784c9deaf2ca422b8dfc11c3d67d7f82 of > https://github.com/apache/flink/pull/4550 > <https://github.com/apache/flink/pull/4550> . Announcing this here as a last > opportunity for further discussions. FYI, this will decrease the code base by > almost 12K LOC. > > Best, > Stefan > > >> Am 02.08.2017 um 15:26 schrieb Kostas Kloudas <k.klou...@data-artisans.com >> <mailto:k.klou...@data-artisans.com>>: >> >> +1 >> >>> On Aug 2, 2017, at 3:16 PM, Till Rohrmann <trohrm...@apache.org >>> <mailto:trohrm...@apache.org>> wrote: >>> >>> +1 >>> >>> On Wed, Aug 2, 2017 at 9:12 AM, Stefan Richter <s.rich...@data-artisans.com >>> <mailto:s.rich...@data-artisans.com>> >>> wrote: >>> >>>> +1 >>>> >>>> Am 28.07.2017 um 16:03 schrieb Stephan Ewen <se...@apache.org >>>> <mailto:se...@apache.org>>: >>>> >>>> Seems like no one raised a concern so far about dropping the savepoint >>>> format compatibility for 1.1 in 1.4. >>>> >>>> Leaving this thread open for some more days, but from the sentiment, it >>>> seems like we should go ahead? >>>> >>>> On Wed, Jul 12, 2017 at 4:43 PM, Stephan Ewen <se...@apache.org >>>> <mailto:se...@apache.org>> wrote: >>>> >>>>> Hi users! >>>>> >>>>> Flink currently maintains backwards compatibility for savepoint formats, >>>>> which means that savepoints taken with Flink version 1.1.x and 1.2.x can >>>>> be >>>>> resumed in Flink 1.3.x >>>>> >>>>> We are discussing how many versions back to support. The proposition is >>>>> the following: >>>>> >>>>> * Suggestion: Flink 1.4.0 will be able to resume savepoints taken with >>>>> version 1.3.x and 1.2.x, but not savepoints from version 1.1.x and 1.0.x* >>>>> >>>>> >>>>> The reason for that is that there is a lot of code mapping between the >>>>> completely different legacy format (1.1.x, not re-scalable) and the >>>>> key-group-oriented format (1.2.x onwards, re-scalable). It would greatly >>>>> help the development of state and checkpointing features to drop that old >>>>> code. >>>>> >>>>> Please let us know if you have concerns about that. >>>>> >>>>> Best, >>>>> Stephan >>>>> >>>>> >>>> >>>> >> >
