Thanks for the update Arvid. This fix warrants a quick 1.12.2 release imo. Cheers, Till
On Fri, Jan 22, 2021 at 1:42 PM Arvid Heise <ar...@ververica.com> wrote: > Hi Xintong, > > yes, I'm on it. > > Best, > > Arvid > > On Fri, Jan 22, 2021 at 1:01 PM Xintong Song <tonysong...@gmail.com> > wrote: > > > Hi Arvid, > > > > Thanks for the announcement. > > > > I think we'd better also update the 1.12 release notes[1] and 1.12.1 > > release blog post[2]. > > Would you have time to help prepare the warning messages? > > > > Thank you~ > > > > Xintong Song > > > > > > [1] > > > > > https://github.com/apache/flink/blob/master/docs/release-notes/flink-1.12.md > > > > [2] > > > > > https://github.com/apache/flink-web/blob/asf-site/_posts/2021-01-19-release-1.12.1.md > > > > > > > > On Fri, Jan 22, 2021 at 7:40 PM Arvid Heise <ar...@apache.org> wrote: > > > > > Dear users, > > > > > > Unfortunately, the bug in the unaligned checkpoint that we fixed in > > 1.12.1 > > > still occurs under certain circumstances, such that we recommend to not > > use > > > unaligned checkpoints in production until 1.12.2. While the normal > > > processing is not affected by this bug, a recovery with corrupted > > > checkpoints will not succeed. > > > > > > If you have used unaligned checkpoints, you can change back to aligned > > > checkpoint when starting from an uncorrupted unaligned checkpoint. > There > > is > > > no easy way to check if a checkpoint is corrupted or not, however, the > > rare > > > corruption happens most likely when you have short checkpointing > > intervals > > > (<1s), high backpressure, and the previous checkpoint was declined for > > some > > > reason. So to be safe, before switching back, make sure that the last > > > handful of checkpoints all succeeded. > > > > > > We have already prepared a fix that we will merge into the release > branch > > > today, but the discussion on when to release 1.12.2 has not started > yet. > > > > > > Best, > > > > > > Arvid > > > > > > > > -- > > Arvid Heise | Senior Java Developer > > <https://www.ververica.com/> > > Follow us @VervericaData > > -- > > Join Flink Forward <https://flink-forward.org/> - The Apache Flink > Conference > > Stream Processing | Event Driven | Real Time > > -- > > Ververica GmbH | Invalidenstrasse 115, 10115 Berlin, Germany > > -- > Ververica GmbH > Registered at Amtsgericht Charlottenburg: HRB 158244 B > Managing Directors: Timothy Alexander Steinert, Yip Park Tung Jason, Ji > (Toni) Cheng >
