ningyougang opened a new issue #2678: How to upgrade invoker gracefully
URL: https://github.com/apache/incubator-openwhisk/issues/2678
 
 
   If i want to upgrade the `invoker` component using new image.
   When use `-e mode=clean` to remove invoker, the relative action containers 
will be removed.
   But may be the action containers are doing the user's task.
   So i am not sure whether we can use `-e mode=clean` to remove invoker.
   
   How can i upgrade the invoker and has no bad influences on the running 
action containers?
   
   As for as i know, currently, there has no solution to support `graceful 
shutdown for invoker`.
   
   Can we have any plan to support it?
   
   One idea: when execute `-e mode=clean`, the invoker should judge whether it 
completed all its child actions. If completed, then `do the remove invoker 
action` really.
 
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