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https://issues.apache.org/jira/browse/KAFKA-7735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Federico Valeri resolved KAFKA-7735.
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Resolution: Won't Fix
> StateChangeLogMerger tool can not work due to incorrect topic regular matches
> -----------------------------------------------------------------------------
>
> Key: KAFKA-7735
> URL: https://issues.apache.org/jira/browse/KAFKA-7735
> Project: Kafka
> Issue Type: Bug
> Components: tools
> Affects Versions: 2.0.0
> Reporter: Fangbin Sun
> Assignee: Federico Valeri
> Priority: Major
>
> When StateChangeLogMerger tool tries to obtain a topic's state-change-log, it
> returns nothing.
> {code:java}
> bin/kafka-run-class.sh com.cmss.kafka.api.StateChangeLogMerger --logs
> state-change.log --topic test{code}
> This tool uses a topic partition regex as follows:
> {code:java}
> val topicPartitionRegex = new Regex("\\[(" + Topic.LEGAL_CHARS + "+),(
> )*([0-9]+)\\]"){code}
> However the state-change-log no longer prints log in the above format. e.g.
> in 0.10.2.0, it prints some state-change logs by case class TopicAndPartition
> which overrided as follows:
> {code:java}
> override def toString = "[%s,%d]".format(topic, partition){code}
> In a newer version (e.g. 1.0.0+) it prints most of state-change logs in the
> form of "partition $topic-$partition", as a workaround one can modify the
> topic partition regex like:
> {code:java}
> val topicPartitionRegex = new Regex("(partition " + Topic.LEGAL_CHARS +
> "+)-([0-9]+)"){code}
> and match topic with "matcher.group(1).substring(10)", however some output of
> state changes might be a little bit redundant.
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