yuruguo opened a new pull request #12128:
URL: https://github.com/apache/pulsar/pull/12128
### Motivation
The value of option `--forward-source-message-property` is true by default,
but it cannot be set to false, which means that we cannot prevent the input
message's properties from being forwarded to the output topic.
The problem is that JCommander doesn't expect arguments to boolean
parameters by default.
This is explained in the JCommander manual and issue comment
cbeust/jcommander#129 (comment) .
### Modifications
- add arity = 1 to the JCommander Parameter annotation.
JCommander requires specifying arity = 1 to boolean parameters that have
a default value of true.
### Documentation
- `no-need-doc`
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