question about the issue that leader becomes follower

[lemon wonder]

There are 5 five servers A, B, C, D, E, A is the leader, B,C,D,E is the follower, but the E has a little network problems, it ofen becomes timeout and turns into a candidate, and after a little while, the network problems disappears, so it can connect to other servers. When this happens, E's term is bigger than A, Will A become follower? note that E will timeout ofen, so it will have a bad influence on system's avalibility. 

[Oren Eini (Ayende Rahien)]

See the discussions on pre vote in this list. It handles this scenario

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On Wed, Dec 28, 2016 at 8:53 AM, lemon wonder <lemo...@gmail.com> wrote:

There are 5 five servers A, B, C, D, E, A is the leader, B,C,D,E is the follower, but the E has a little network problems, it ofen becomes timeout and turns into a candidate, and after a little while, the network problems disappears, so it can connect to other servers. When this happens, E's term is bigger than A, Will A become follower? note that E will timeout ofen, so it will have a bad influence on system's avalibility. 

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[lemon wonder]

sorry, I have read pre vote, but I think they don't say clearly. They said the situation that the bad node can't connect to the leader, in my situation, the bad node will connect to leader and make leader become follower because it's term is high. Therefore there is no leader. I still have some confusion that will the leader become follower or there is other ways to handle this?

在 2016年12月28日星期三 UTC+8下午2:56:44，Ayende Rahien写道：

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[Oren Eini (Ayende Rahien)]

When you are doing pre vote, the bad node will try talking to other ndoes as well to see if they can talk to the leader.

If enough answer that they do, it will assume it is its fault and wait another cycle, then do another pre vote.

In other words, it won't increment its term

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[lemon9010]

It's really great, thank you.

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< Oren Eini (Ayende Rahien)> 2016-12-29 03:27:18 wrote:

When you are doing pre vote, the bad node will try talking to other ndoes as well to see if they can talk to the leader.

If enough answer that they do, it will assume it is its fault and wait another cycle, then do another pre vote.

In other words, it won't increment its term

Hibernating Rhinos Ltd  

Oren Eini l CEO l Mobile: + 972-52-548-6969

Office: +972-4-622-7811 l Fax: +972-153-4-622-7811

 

On Wed, Dec 28, 2016 at 6:36 PM, lemon wonder <lemo...@gmail.com> wrote:

sorry, I have read pre vote, but I think they don't say clearly. They said the situation that the bad node can't connect to the leader, in my situation, the bad node will connect to leader and make leader become follower because it's term is high. Therefore there is no leader. I still have some confusion that will the leader become follower or there is other ways to handle this?

在 2016年12月28日星期三 UTC+8下午2:56:44，Ayende Rahien写道：

See the discussions on pre vote in this list. It handles this scenario

To unsubscribe from this group and stop receiving emails from it, send an email to raft-dev+u...@googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

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