Jason Gustafson created KAFKA-10702:
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Summary: Slow replication of empty transactions
Key: KAFKA-10702
URL: https://issues.apache.org/jira/browse/KAFKA-10702
Project: Kafka
Issue Type: Bug
Reporter: Jason Gustafson
Assignee: Jason Gustafson
We hit a case in which we had to re-replicate a compacted topic from the
beginning of the log. Some portions of the log consisted mostly of transaction
markers, which were extremely slow to replicate. The problem is that
`ProducerStateManager` adds all of these empty transactions to its internal
collection of `ongoingTxns` before immediately removing them. There could be
tens of thousands of empty transactions in the worst case from a single `Fetch`
response, so this can create a huge amount of pressure on the broker.
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