Is it possible to move a zone between catalogs on the same secondary? It is.

[Aram Sargsyan]

Hello, Jan-Piet, 
  
> however, when I stop and restart the consumer server, I have sometimes (not always) seen 
> 
> catz: catz_addmodzone_cb: zone 'z10.aa' will not be added because another catalog zone already contains an entry with that zone 
>
>which is true, but it doesn't _seem_ to cause issues. 

That's just working as designed. If a member zone exists in both catz1 and catz2 catalog zones, and catz1 has a defined "coo" change of ownership property allowing a given member zone to be transferred to catz2, then there are two scenarios when a catalog zone consumer starts up: 
  
1. It loads the member zone from catz1 first, then it sees the member zone exists also in catz2, and the "coo" property allows that, then the zone will be transferred from catz1 to catz2. 
  
2. It loads the member zone from catz2 first, then it sees the member zone exists also in catz1, and there is no "coo" property allowing it to transfer from catz2 to catz1, so it emits the log message that you have seen, and continues serving the member zone from catz2. 
  
That's why it's recommended to remove the transferred member zone from catz1, once it is established that all the consumers have successfully processed the change of ownership operation. 
  
Aram 
 
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