[KAFKA-7111] Review the NetworkClient log level used

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: clients
• Assignee: Stanislav Kozlovski
• Reporter: Luan Cestari
• Reviewer: Rajini Sivaram
• Created: 27/Jun/18 22:52
• Updated: 01/Jul/18 12:06
• Resolved: 29/Jun/18 14:39

Description

Hi,

 

I was using Kafka on some projects and unfortunately I had to use Debug (and some times even Trace) log level to see some issues. One of the most recently cases was: 

https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/NetworkClient.java#L872

 

If I got the name of the broker and it is unreachable, the errors should be more severe than "DEBUG" level IMHO. I would at least put a INFO level for this case or ERROR level (which seems to fit better but I don't know the practices used in the project).

 

Thank you in advance

 

Issue Links

• relates to: KAFKA-4122 Consumer startup swallows DNS resolution exception and infinitely retries
• links to: GitHub Pull Request #5312