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you must declare the json schema in the

vs

parameter.

bin/pulsar-client produce \
    -m "{\"id\":\"hello\"}" \
    -vs "json:{\"type\": \"record\",\"namespace\": \"com.example\",\"name\": \"myschema\", \"fields\": [{ \"name\": \"id\", \"type\": \"string\" }]}" \
    mytopic

Are you passing two json objects?

-vs is the value schema

-vs, --value-schema

Schema type (can be bytes,avro,json,string...)

Default: bytes

i mean which is the message that is being passed?

the -m is the message with the content. “vs” explains the schema for the messages if you subscribe to the topic, you will get {“id”: “hello”}

thanks