Eric - Might be helpful if you post the code that you had as one of your slides so that we can see exactly what you're doing.
Henry On 8 December 2012 20:56, Eric Pederson <[email protected]> wrote: > If I recall correctly it was Henry Robinson that gave me the advice to have > a "task in progress" check. > > > -- Eric > > > > On Sat, Dec 8, 2012 at 11:54 PM, Eric Pederson <[email protected]> wrote: > > > I am using Curator LeaderLatch :) > > > > > > -- Eric > > > > > > > > > > On Sat, Dec 8, 2012 at 11:52 PM, Jordan Zimmerman < > > [email protected]> wrote: > > > >> You might check your leader implementation. Writing a correct leader > >> recipe is actually quite challenging due to edge cases. Have a look at > >> Curator (disclosure: I wrote it) for an example. > >> > >> -JZ > >> > >> On Dec 8, 2012, at 8:49 PM, Eric Pederson <[email protected]> wrote: > >> > >> > Actually I had the same thought and didn't consider having to do this > >> until > >> > I talked about my project at a Zookeeper User Group a month or so ago > >> and I > >> > was given this advice. > >> > > >> > I know that I do see leadership being lost/transferred when one of the > >> ZK > >> > servers is restarted (not the whole ensemble). And it seems like > I've > >> > seen it happen even when the ensemble stays totally stable (though I > am > >> not > >> > 100% sure as it's been a while since I have worked on this particular > >> > application). > >> > > >> > > >> > > >> > -- Eric > >> > > >> > > >> > > >> > On Sat, Dec 8, 2012 at 11:25 PM, Jordan Zimmerman < > >> > [email protected]> wrote: > >> > > >> >> Why would it lose leadership? The only reason I can think of is if > the > >> ZK > >> >> cluster goes down. In normal use, the ZK cluster won't go down (I > >> assume > >> >> you're running 3 or 5 instances). > >> >> > >> >> -JZ > >> >> > >> >> On Dec 8, 2012, at 8:17 PM, Eric Pederson <[email protected]> wrote: > >> >> > >> >>> During the time the task is running a cluster member could lose its > >> >>> leadership. > >> >> > >> >> > >> > >> > > > -- Henry Robinson Software Engineer Cloudera 415-994-6679
