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Posted to dev@kafka.apache.org by "Matthias J. Sax (JIRA)" <ji...@apache.org> on 2019/04/11 09:35:00 UTC
[jira] [Resolved] (KAFKA-8201) Kafka streams repartitioning topic
settings crashing multiple nodes
[ https://issues.apache.org/jira/browse/KAFKA-8201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthias J. Sax resolved KAFKA-8201.
------------------------------------
Resolution: Not A Bug
> Kafka streams repartitioning topic settings crashing multiple nodes
> -------------------------------------------------------------------
>
> Key: KAFKA-8201
> URL: https://issues.apache.org/jira/browse/KAFKA-8201
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.0.0
> Reporter: Anders Aagaard
> Priority: Major
>
> We had an incident in a setup using kafka streams version 2.0.0 and kafka version 2.0.0 protocol version 2.0-IV1. The reason for it is a combination of kafka streams defaults and a bug in kafka.
> Info about the setup: Streams application reading a log compacted input topic, and performing a groupby operation requiring repartitioning.
> Kafka streams automatically creates a repartitioning topic with 24 partitions and the following options:
> segment.bytes=52428800, retention.ms=9223372036854775807, segment.index.bytes=52428800, cleanup.policy=delete, segment.ms=600000.
>
> This should mean we roll out a new segment when the active one reaches 50mb or is older than 10 mniutes. However, the different timestamps coming into the topic due to log compaction (sometimes varying in multiple days) means the server will see a message which is older than segments.ms and automatically trigger a new segment roll out. This causes a segment explosion. Where new segments are continuously rolled out.
> There seems to be a bug report for this server side here : https://issues.apache.org/jira/browse/KAFKA-4336.
> This effectively took down several nodes and a broker in our cluster.
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