[KAFKA-5118] Improve message for Kafka failed startup with non-Kafka data in data.dirs

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.10.2.0
• Fix Version/s: 0.10.2.2, 0.11.0.0
• Component/s: core
• Assignee: huxihx
• Reporter: Dustin Cote
• Created: 24/Apr/17 19:50
• Updated: 15/May/17 08:48
• Resolved: 04/May/17 18:46

Description

Today, if you try to startup a broker with some non-Kafka data in the data.dirs you end up with a cryptic message:

[2017-04-21 13:35:08,122] ERROR There was an error in one of the threads during logs loading: java.lang.StringIndexOutOfBoundsException: String index out of range: -1 (kafka.log.LogManager) 
[2017-04-21 13:35:08,124] FATAL [Kafka Server 3], Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer) 
java.lang.StringIndexOutOfBoundsException: String index out of range: -1 

It'd be better if we could tell the user to look for non-Kafka data in the data.dirs and print out the offending directory that caused the problem in the first place.

Issue Links

• links to: Github Pull Request 2907