Question on quorum behavior

[Sergey Doroshenko]

In short: it seems leader can treat observers as quorum members.

Steps to repro:

1. I have a following ensemble configuration:
# servers list
server.1=localhost:2881:3881
server.2=localhost:2882:3882
server.3=localhost:2883:3883:observer
server.4=localhost:2884:3884
server.5=localhost:2885:3885:observer

2. I'm bringing up servers 1,2,3 and it's enough for quorum (1 and 2).
3. I'm shutting down the one from the quorum who is the follower.

As I understand, expected result is that leader will start a new election
round so that to regain quorum.
But the real situation is that it just says goodbye to that follower, and is
still operable. (When I'm shutting down 3rd one -- observer -- leader starts
trying to regain a quorum).

Is this a bug, or a feature?


-- 
Regards, Sergey

Re: Question on quorum behavior

[Henry Robinson]

Sergey -

Sounds like a bug. Can you open a new JIRA and attach your log files to it?

Thanks,
Henry

On 6 May 2010 07:50, Sergey Doroshenko dors...@gmail.com wrote:

 In short: it seems leader can treat observers as quorum members.

 Steps to repro:

 1. I have a following ensemble configuration:
 # servers list
 server.1=localhost:2881:3881
 server.2=localhost:2882:3882
 server.3=localhost:2883:3883:observer
 server.4=localhost:2884:3884
 server.5=localhost:2885:3885:observer

 2. I'm bringing up servers 1,2,3 and it's enough for quorum (1 and 2).
 3. I'm shutting down the one from the quorum who is the follower.

 As I understand, expected result is that leader will start a new election
 round so that to regain quorum.
 But the real situation is that it just says goodbye to that follower, and
 is
 still operable. (When I'm shutting down 3rd one -- observer -- leader
 starts
 trying to regain a quorum).

 Is this a bug, or a feature?


 --
 Regards, Sergey




-- 
Henry Robinson
Software Engineer
Cloudera
415-994-6679