[KAFKA-10802] Spurious log message when starting consumers

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.7.0, 2.6.1, 2.8.0
• Assignee: Guozhang Wang
• Reporter: Mickael Maison
• Created: 03/Dec/20 13:05
• Updated: 29/May/23 10:07
• Resolved: 10/Dec/20 22:16

Description

Reported by Gary Russell in the 2.6.1 RC3 vote thread

I am seeing this on every consumer start:

2020-11-25 13:54:34.858 INFO 42250 — ntainer#0-0-C-1 o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-ktest26int-1, groupId=ktest26int] Rebalance failed.

org.apache.kafka.common.errors.MemberIdRequiredException: The group member needs to have a valid member id before actually entering a consumer group.

Due to this change https://github.com/apache/kafka/commit/16ec1793d53700623c9cb43e711f585aafd44dd4#diff-15efe9b844f78b686393b6c2e2ad61306c3473225742caed05c7edab9a138832R468

I understand what a MemberIdRequiredException is, but the previous (2.6.0) log (with exception.getMessage()) didn't stand out like the new one does because it was all on one line.