Il ven 1 giu 2018, 08:49 Sijie Guo <guosi...@gmail.com> ha scritto: > 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? >
I have checked several times and it seems to me that every zk fix in 4.7.0 has been cherry picked to 4.6.2. It is only a fact that with the upgrade the issue does not appear. Maybe it is too early to say that it is working. I will send news Enrico > - 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 > > > -- -- Enrico Olivelli
