[KAFKA-8889] Root cause is lost for FetchSessionHandler.handleError

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.4.0
• Assignee: Unassigned
• Reporter: Qinghui Xu
• Created: 09/Sep/19 21:43
• Updated: 10/Sep/19 05:27
• Resolved: 10/Sep/19 05:27

Description

FetchSessionHandler is not logging properly the errors, and produces error messages sometimes hard to understand the root cause.

More precisely, FetchSessionHandler.handleError prints Throwable.toString, which is merely a summary message, and loses the stacktrace of the error. For example, we can get some messages, but cannot get a clue about why:

Error sending fetch request (sessionId=1655236778, epoch=99) to node 01: org.apache.kafka.common.errors.DisconnectException 

Issue Links

• links to: GitHub Pull Request #7317