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https://issues.apache.org/jira/browse/KAFKA-21041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Schofield resolved KAFKA-21041.
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Fix Version/s: 4.5.0
Resolution: Fixed
> ClientMetricsConfigs rejects match patterns whose regex contains an equals
> sign
> -------------------------------------------------------------------------------
>
> Key: KAFKA-21041
> URL: https://issues.apache.org/jira/browse/KAFKA-21041
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 4.3.1
> Reporter: cuishuang
> Priority: Trivial
> Fix For: 4.5.0
>
>
> ClientMetricsConfigs.parseMatchingPatterns currently splits client match
> patterns using String.split("="), which splits on every equals sign.
> The method Javadoc specifies that a client match pattern is split into two
> parts at the first occurrence of '='.
> For example:
> client_id=foo=bar
> should be parsed as:
> parameter: client_id
> regex: foo=bar
> However, the current implementation produces three parts and throws
> InvalidConfigurationException.
> Expected behavior:
> The first '=' separates the parameter name from the regular expression, and
> additional '=' characters remain part of the regular expression.
> Actual behavior:
> Patterns whose regular expression contains '=' are rejected.
> A fix using split("=", 2), together with a regression test, restores the
> behavior described by the existing Javadoc.
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