joptsimple.UnrecognizedOptionException: num.producers is not a recognized option

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joptsimple.UnrecognizedOptionException: num.producers is not a recognized option
at joptsimple.OptionException.unrecognizedOption(OptionException.java:108)
at joptsimple.OptionParser.handleLongOptionToken(OptionParser.java:449)
at joptsimple.OptionParserState$2.handleArgument(OptionParserState.java:56)
at joptsimple.OptionParser.parse(OptionParser.java:381)
at kafka.tools.MirrorMaker$.main(MirrorMaker.scala:167)
at kafka.tools.MirrorMaker.main(MirrorMaker.scala)

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