We have several topologies that should run continuously without halting.
1. how to release next version of topology without halting?
In some cases, we can run two same topologies in a cluster so that when running
next version of topology jar, we can restart one by one not to halt entire
service.
But if we cannot seperate incoming spout, this strategy cannot be applied also.
2. main question, how to upgrade storm without downtime?
Currently when we upgrade storm, we stop all the topologies then kill
supervisors, nimbus, and launch new nimbus, supervisor, then run topologies
again.
Is there any way to avoid this?
Maybe relaunching supervisor one by one and finally replacing nimbus would work
without killing running topology, but I'm not sure about that.
do you have any idea?
