[KAFKA-7732] Kafka broker lag metrics is more than 0, but no partitions are under replicated

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.1.0
• Component/s: metrics
• Assignee: Unassigned
• Reporter: Mathias Kub
• Created: 13/Dec/18 16:17
• Updated: 18/Dec/18 06:55

Description

Hi,

I just upgraded Kafka from 1.1.1 to 2.1.0 and

kafka.server:type=ReplicaFetcherManager,name=MaxLag,clientId=Replica

shows billions of lag, but no partition is under replicated.

kafka.server:type=FetcherLagMetrics,name=ConsumerLag,clientId=ReplicaFetcherThread-0-2,topic=topicname,partition=1

shows 0 or - I guess - the offset as lag, depending on when I display the value.

I attached a video demonstrating the problem.