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https://issues.apache.org/jira/browse/KAFKA-17192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17868496#comment-17868496
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Bertalan Kondrat commented on KAFKA-17192:
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Thanks [~gharris1727],
Yeah, the workaround probably works, but this change could cause headache to
other users as well, when they upgrade to 3.7 from an earlier version.
> MirrorMaker2 worker config does not pass config.providers value to connectors
> -----------------------------------------------------------------------------
>
> Key: KAFKA-17192
> URL: https://issues.apache.org/jira/browse/KAFKA-17192
> Project: Kafka
> Issue Type: Bug
> Components: mirrormaker
> Affects Versions: 3.7.0, 3.7.1
> Reporter: Bertalan Kondrat
> Assignee: Bertalan Kondrat
> Priority: Major
>
> MirrorMaker2 worker config does not pass config.providers value to connectors.
> With this
> [commit|https://github.com/apache/kafka/commit/8cfafba2794562840b0f1c537e304f084b9359cf#diff-015b9a2584a6c84806c633ec7fb59d7a9639bb7d8b206e582029af486881e41dL309]
> we changed the behavior of the _stringsWithPrefix_ method.
> The new implementation does not include the configurations where the prefix
> exactly the same as the config key.
> For example:
> Prefix:
> {code:java}
> config.providers{code}
> Configs:
> {code:java}
> config.providers=env
> config.providers.env.class=org.apache.kafka.common.config.provider.EnvVarConfigProvider{code}
> Result:
> {code:java}
> config.providers.env.class=org.apache.kafka.common.config.provider.EnvVarConfigProvider
> {code}
> The result does not include the
> {noformat}
> config.providers=env{noformat}
>
> As a result of this behavior, the connectors could not resolve variables.
> Reproduction is easy, just start an MM2 instance with the following config
> {code:java}
> ssl.truststore.location=${env:TRUSTSTORE_LOCATION}
> config.providers=env
> config.providers.env.class=org.apache.kafka.common.config.provider.EnvVarConfigProvider
> {code}
> Check the connector configs in the log. (grep for ${env:TRUSTSTORE_LOCATION})
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