turtleDeng opened a new issue #8323:
URL: https://github.com/apache/pulsar/issues/8323


   I am trying to use Erlang to develop the pulsar client library, and after 
reading the official documentation, Use Protocol Buffer for protocol 
interaction. 
   When I was developing the consumer, I found that the format of the received 
packet was different from that of the document
   ```
   http://pulsar.apache.org/docs/en/develop-binary-protocol/#payload-commands
   ```
   The magicNumber and checksum in the document do not match the package I 
received
   
   The following is a complete package
   ```
   
[0,0,0,64,0,0,0,15,8,9,74,11,8,1,18,7,8,226,77,16,1,24,0,0,0,0,36,10,18,115,116,97,110,100,97,108,111,110,101,45,49,48,45,55,56,50,48,16,1,24,155,170,151,204,212,46,50,3,107,101,121,64,0,104,101,108,108,111]
   ```
   
   ```
   totalSize: 0,0,0,64,
   commandSize: 0,0,0,15,
   message: 8,9,74,11,8,1,18,7,8,226,77,16,1,24,0,
   metadataSize: 0,0,0,36,
   metadata: 
10,18,115,116,97,110,100,97,108,111,110,101,45,49,48,45,55,56,50,48,16, 
1,24,155,170,151,204,212,46,50,3,107,101,121,64,0,
   payload 104,101,108,108,111
   ```


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