MongoDB: Adding member to replica set triggers election in 3.2.11?

Question

What are the scenarios that cause mongodb to trigger an election on rs.add()?

In version 3.2.11, I have seen multiple times that adding/removing member to replica set does not trigger an election.

Contrary, in version 2.6, most of the times on rs.add()/rs.remove() calls would trigger election.

From docs, rs.add() can, in some cases, trigger an election.

What are the possible situations that may trigger an election? How can I completely avoid the election during rs.add()?

PS: There are some scenarios where we don't want an election to be triggered.

Have you taken a look at the logs, to see if they say anything about why the election is being called? — Vince Bowdren, Apr 28 '17 at 09:45

score 0 · Answer 1 · answered Apr 27 '17 at 08:25

0

Election is triggered at least in scenario when you include "priority" information with node name.

answered Apr 27 '17 at 08:25

JJussi

The above add method includes priority. But does not trigger an election – Atish Apr 28 '17 at 07:23

1 Answers1