David Jacot created KAFKA-9065:
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Summary: Loading offsets and group metadata loops forever
Key: KAFKA-9065
URL: https://issues.apache.org/jira/browse/KAFKA-9065
Project: Kafka
Issue Type: Bug
Reporter: David Jacot
When the metadata manager loads the groups and the offsets of a partition of
the __consumer-offsets topic, `GroupMetadataManager.doLoadGroupsAndOffsets`
could loop forever if the start offset of the partition is smaller than the end
offset and no records are effectively read from the partition.
While the conditions leading to this issue are not clear, I've got the case
where a partition was having two segments which were both empty in a cluster.
This could theoretically happen when all the tombstones in the first are
expired and the second is truncated.
As a side effect, the `doLoadGroupsAndOffsets` spins forever, blocks the single
thread of the scheduler, blocks the loading of all the groups and offsets which
are after in the queue, and blocks the expiration of the offsets.
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