I have opened ZOOKEEPER-261 for this issue. it shouldn't be too hard to fix and it would be nice to target for 3.1.
ben -----Original Message----- From: thomas.john...@sun.com [mailto:thomas.john...@sun.com] Sent: Wednesday, December 17, 2008 2:52 PM To: zookeeper-user@hadoop.apache.org Subject: Re: What happens when a server loses all its state? Thanks for all the responses. Benjamin Reed wrote: > Thomas, > > in the scenario you give you have two simultaneous failures with 3 nodes, so > it will not recover correctly. A is failed because it is not up. B has failed > because it lost all its data. > > it would be good for ZooKeeper to not come up in that scenario. perhaps what > we need is something similar to your safe state proposal. basically a server > that has forgotten everything should not be allowed to vote in the leader > election. that would avoid your scenario. we just need to put a flag file in > the data directory to say that the data is valid and thus can vote. > > ben > ________________________________________ > Would this feature be something you'd consider implementing in the short to medium term?
