lordcheng10 opened a new pull request #2947:
URL: https://github.com/apache/bookkeeper/pull/2947


   ### Motivation
   When upgrading bookkeeper, you need to restart the bookie nodes in turn. 
When restarting a bookie, the pulsar will fail to read and write to the bookie, 
so as to isolate the bookie node. The default isolation is 30 minutes. With 
more and more restarted bookie nodes, the traffic of the whole cluster will be 
transferred to the remaining few bookie nodes, At this time, the bookie node 
may be abnormal due to excessive pressure, such as pulsar read-write timeout.
   
   
   ### Changes
   Therefore, I provide a configuration to dynamically turn off the health 
check. When upgrading bookkeeper, turn off the isolation function and turn it 
on after the upgrade, so as to avoid the impact of upgrading bookkeeper on the 
stability of pulsar.
   


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