Page History

...

1. Response flag. All server responses include flags field, and server sets a flag when the assignment has changed since the last response. It is up to the client to retrieve updated assignment when needed. This mechanism is used in Ignite 2.x. 
   Pros: Low overhead, no extra network traffic.
   Cons: Idle clients do not get the update.
   
   
   
2. Server → client notification. As soon as assignment changes, server sends a message to all clients.
   Pros: Immediate update for all clients.
   Cons: Increased network traffic and server load. Some clients may not need the update at all (not all APIs require this).
   
   
3. PrimaryReplicaMissException (suggested in

   Jira
   server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key IGNITE-17394

   comments).
   Pros: No protocol changes.
   Cons: Retry is required on replica miss (complicated & inefficient). Using exceptions for control flow.

...