addisonj commented on issue #8264:
URL: https://github.com/apache/pulsar/issues/8264#issuecomment-712324372


   I worked with @frankjkelly  to find that this wasn't an issue in pulsar, but 
there is some strange behavior if the user re-uses buffers as an input to the 
client.
   
   See 
https://github.com/kellyfj/message-ordering/pull/1#issuecomment-710760790 for 
more context, but the tl;dr is that I think the reference to the buffer change 
out from underneath us in async production. We may need to copy the buffer or 
use some other technique to ensure that reference can't be modified before we 
send the buffer


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