I don't think there is any zk changes between 4.6.2 and 4.7.0. Are you sure the upgrade fixes the problem?
- Sijie On Thu, May 31, 2018 at 11:30 PM, Enrico Olivelli <eolive...@gmail.com> wrote: > Seems that al the sites which are reporting this kind of problems are ONLY > on 4.6.2. > > After an upgrade to 4.7.0 apparently the problem disappears. > > I will send news next week > > Enrico > > Il dom 20 mag 2018, 19:18 Enrico Olivelli <eolive...@gmail.com> ha > scritto: > > > My guess is that is about using zk ACLs > > I have no evidence > > > > Enrico > > > > > > Il mar 15 mag 2018, 14:09 Enrico Olivelli <eolive...@gmail.com> ha > > scritto: > > > >> Il giorno mar 15 mag 2018 alle ore 14:04 Sijie Guo <guosi...@gmail.com> > >> ha scritto: > >> > >>> On Tue, May 15, 2018 at 4:45 AM, Enrico Olivelli <eolive...@gmail.com> > >>> wrote: > >>> > >>> > Hi, > >>> > it is quite some time that we are seeing Bookies in staging > >>> environments > >>> > which disappear from ZK but appartently are still up and running. > >>> > > >>> > I have not dug deeply into this problem, but at first glance it > should > >>> be > >>> > related to ZK session expiration, those machines are heavily loaded > >>> > sometimes and it is not surprising that ZK session expires. > >>> > > >>> > >>> There should be already a logic on re-registration after session > expired, > >>> no? > >>> > >> > >> Yes. The fact is that in the month we are seeing this strange behaviour. > >> I don't know if it could be a regression on 4.7. > >> I have no reports from production sites, but in production we have > >> dedicated machines for bookies. > >> > >> > >>> > >>> ZooKeeper stats should always show whether a bookie is able to connect > to > >>> zookeeper. That would probably tell you what happens. > >>> > >> > >> I will check, thank you for your suggestion. > >> > >> Enrico > >> > >> > >> > >>> > >>> > >>> > > >>> > Apart from searching for a bug, I wonder if would it be useful an > >>> automatic > >>> > self check of the bookie, something like a periodic check which asks > >>> to the > >>> > Registration Manager if the bookie is listed in the expected bookie > >>> list > >>> > (readonly/available....) > >>> > > >>> > This will be useful even if we are not using ZK as well, now that we > >>> have > >>> > this great abstraction of ZK > >>> > > >>> > Thoughts ? > >>> > > >>> > Enrico > >>> > > >>> > >> -- > > > > > > -- Enrico Olivelli > > > -- > > > -- Enrico Olivelli >
