[KAFKA-4175] Can't have StandbyTasks in KafkaStreams where NUM_STREAM_THREADS_CONFIG > 1

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.10.1.0
• Fix Version/s: 0.10.1.0
• Component/s: streams
• Assignee: Damian Guy
• Reporter: Damian Guy
• Created: 15/Sep/16 14:18
• Updated: 19/Sep/16 17:31
• Resolved: 19/Sep/16 17:31

Description

When we have StandbyTasks in a Kafka Streams app and we have > 1 threads per instance we can run into:

Caused by: java.io.IOException: task [1_0] Failed to lock the state directory: /private/tmp/kafka-streams-smoketest/2/SmokeTest/1_0

This is because the same StandbyTask has been assigned to each thread in the same KafkaStreams instance

Issue Links

• links to: GitHub Pull Request #1862