[jira] [Created] (KAFKA-9917) Consumer not assigned any partitions in group after broker restart

["Igor Baltiyskiy (Jira)" <ji...@apache.org>]

Igor Baltiyskiy created KAFKA-9917:
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             Summary: Consumer not assigned any partitions in group after broker restart
                 Key: KAFKA-9917
                 URL: https://issues.apache.org/jira/browse/KAFKA-9917
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 2.1.1
         Environment: Image solsson/kafka:2.1.1@sha256:8bc8242c649c395ab79d76cc83b1052e63b4efea7f83547bf11eb3ef5ea6f8e1 deployed in Kubernetes v 1.12.7 (minikube v1.4.0)
1 broker
            Reporter: Igor Baltiyskiy
         Attachments: app-logs.truncated.txt, kafka-logs.2.txt

I've only reproduced it once for now, so I don't have a ready reproduction sequence.

I was trying to reproduce KAFKA-9912, as advised, and kept restarting Kafka (via {{kubectl scale --replicas 0 / 1}}). At some point my application entered the state where there is an active KafkaConsumer in a group ID, but it is not assigned any partitions, although the broker is functional.
{code:java}
 bin/kafka-consumer-groups.sh --bootstrap-server kafka:9092 --describe --group tfp-9
Consumer group 'tfp-9' has no active members.TOPIC              PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG             CONSUMER-ID     HOST            CLIENT-ID
increasing-topic-0 0          270574          500000          229426          -               -               - {code}
{code:java}
bin/kafka-console-consumer.sh --bootstrap-server kafka:9092 --topic increasing-topic-0  --partition 0 --offset 270574 --max-messages 5
270575
270576
270577
270578
270579
Processed a total of 5 messages{code}
I'm attaching broker and application logs (without "Resuming|Pausing partitions []" messages, also truncated from the beginning so that they start just before the broker is started).

 



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