When a broker goes down, what will the Controller do?

The correct answer is B. Trigger a leader election among the remaining followers to distribute leadership. When a broker goes down, the Controller detects the failure and triggers a leader election for all partitions that had their leader on the failed broker. The leader is chosen from the in-sync replicas (ISRs) of each partition.

Managing Brokers and Clusters

Question

Options

AWait for a follower to take the lead.
BTrigger a leader election among the remaining followers to distribute leadership.
CBecome the leader for the topic/partition that needs a leader, pending the broker return in the
DAutomatically elect the least loaded broker to become the leader for every orphan's partitions.

How the community answered

(27 responses)

A
7% (2)
B
78% (21)
C
4% (1)
D
11% (3)

Explanation

When a broker goes down, the Controller detects the failure and triggers a leader election for all partitions that had their leader on the failed broker. The leader is chosen from the in-sync replicas (ISRs) of each partition.

Topics

#controller#leader election#broker failure#partition leadership

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