I think it is not too difficult to reproduce. Just create 3 node ensemble, and have some clients create ephemeral nodes. And then kill one of ensemble by kill -9. I don't remember it was a leader or a follower.
and then if you see those ephemeral nodes gone, restart the ensemble Java process. I think I have seen this happening twice when I continued this same experiment multiple times. I am not trying to create FUD around Zookeeper. Actually it is exact opposite. I fell in love with Zookeeper, and I still am. I am using Zookeeper for our production system. In fact, it is THE only Java solution I believe in. Really. I just couldn't find time to reproduce and report a bug. Chang Dec 1, 2010, 11:08 PM, Fournier, Camille F. [Tech] 작성: > Would love to hear more about your ensemble settings to try and recreate this > issue. Would be a very bad thing for my deployment as well... > > Camille > > ----- Original Message ----- > From: Chang Song <[email protected]> > To: [email protected] <[email protected]> > Cc: [email protected] <[email protected]> > Sent: Wed Dec 01 08:09:30 2010 > Subject: Re: question about ZK robustness > > > Ted. > > I have been inconsistency between different ensemble servers when we did > some torture testing. > > I killed Java process with -9 on one ensemble server, and restarted it, and > saw > that ephemeral nodes that disappeared from other two ensemble servers stuck in > newly restarted ensemble. No matter what I do, "create, sync, get", the > ephemeral > nodes did not disappear. I had to remove the log and force re-sync from > scratch. > > I had seen this behavior twice. Exactly the same behavior. I had about 2000 > clients connected > ensemble servers. I had no time to file a bug report, but when I have time to > do another > torture testing, I will definitely file a bug report. > > This is not a data loss, but a serious, dead serious inconsistency as far as > my application goes. > Please let me know if you happened to know related bug. > > Thank you. > > Chang > > > Dec 1, 2010, 1:41 PM, Ted Dunning 작성: > >> Sure. Let me know when. I have learned a bit more from Ben since I wrote >> that first bit so I could amplify the exposition >> just a bit when the time comes. >> >> On Tue, Nov 30, 2010 at 8:07 PM, Mahadev Konar <[email protected]>wrote: >> >>> I meant to say, we can wait a while before we are done moving to the new >>> wiki tree. >>> >
