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From GitBox <...@apache.org>
Subject [GitHub] sijie opened a new issue #3288: [feature request] allow consumers joining in standby state in failover subscription
Date Thu, 03 Jan 2019 06:02:44 GMT
sijie opened a new issue #3288: [feature request] allow consumers joining in standby state
in failover subscription
URL: https://github.com/apache/pulsar/issues/3288
 
 
   #### Feature
   
   In streaming applications, when a subscription scales up the consumer group, the new consumers
joining the consumer group might be doing expensive operations (e.g. like replaying db or
state). In this case, it might be great to let consumer connect in a standby state, when the
consumer finishes its application logic, it can then be converted to an normal state and get
ready for being elected as an owner for some partitions.
   
   This is a very useful feature for developing stateful streaming applications (e.g. supporting
kstreams like application).

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