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• Add --bootstrap-server  to kafka-producer-perf-test.sh  bringing it into line with all the other tools. Because users will already have config files which specify the bootstrap server and there's no need to break these, the new --bootstrap-server  flag is optional. If provided, it takes precedence over specifying bootstrap.servers  in the configuration file.
• Replace --producer-props  with --producer-property  in kafka-producer-perf-test.sh  , bringing it into line with the other tools that accept producer or consumer properties.
• For all tools which support a properties file, replace the existing option for specifying a configuration properties file with --command-config  . This eliminates the guesswork about whether a particular tool uses the producer, consumer or admin APIs and then chose to pass this knowledge into the original names of the command-line arguments.

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The existing options will be deprecated until the next major Apache Kafka release, and then they will be removed. During the deprecation period, using the old parameter names will cause a deprecation message to be displayed. It is an error to use both the old name and the new name together - they are mutually exclusive.

All uses of the command-line tools in the Apache Kafka codebase will be migrated over to the new parameter names.

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