I too have seen this issue, but I couldn't reproduce or surmise how it might happen from just inspecting the code. How'd it appear for you? I would disagree that a checkpoint file not appearing is a small thing however. It is more or less the most important artifact for recovery. It's not something that ever should have an issue like this.
On Wed, Nov 29, 2017 at 1:54 PM, Chen Luo <[email protected]> wrote: > Hi devs, > > Recently I was experiencing a very annoying issue about recovery. The > checkpoint file of my dataset was somehow corrupted (and I didn't know > why). However, when I was restarting AsterixDB, it fails to read the > checkpoint file, and starts recovering as a clean state. This is highly > undesirable in the sense that it clean up all of my experiment datasets > saliently, roughly 100GB. And it'll take me days to re-ingest these data to > resume my experiments. > > I think the behavior of cleaning up all data when some small thing goes > wrong is undesirable and dangerous. When AsterixDB fails to restart, and > finds the data directory non-empty, I think it should notify the user and > let the user to make the decision. For example, it could fail to restart at > this time, and user could clean up the directory manually, or try to use a > backup checkpoint file, or add some flag to force restart. Anyway, blindly > cleaning up all files seem to be a dangerous solution. > > Any thoughts on this? > > Best regards, > Chen Luo
