Description

Consumer in cooperative incremental mode will hang if an assignment callback is being processed while it's closing.

How to reproduce

Added a variation 3 to test 0113 to reproduce the bug. The test times out.

Checklist

Please provide the following information:

• librdkafka version (release number or git tag): master
• Apache Kafka version: any
• librdkafka client configuration: any
• Operating system: any
• Critical issue