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https://issues.apache.org/jira/browse/IGNITE-13577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Daschinskiy updated IGNITE-13577:
--------------------------------------
    Description: 
Proposed design:

*LN* -- node that performs graceful shutdown
*CRD* -- Leader (coordinator) of Ignite cluster
*N* -- Other nodes of Ignite cluster.

#  While elected, *CRD* set watches on /<root>/ns
# *LN* create EPHEMERAL znode on /<root>/ns
# *LN* blocks stop until receive NODE_LEFT event.
# *CRD* receives notification and reset watches on /<root>/ns
# *CRD* generate NODE_LEFT event.
# *LN* receives events and continue stop process
# *CRD* on receiving all acks checks that there is no nodes on /<root>/ns and 
/<root>/n
related to *LN* and remove them if they presents.

  was:
Proposed design:

*LN* -- node that performs graceful shutdown
*CRD* -- Leader (coordinator) of Ignite cluster
*N* -- Other nodes of Ignite cluster.

#  While elected, *LN* set watches on /<root>/ns
# *LN* create EPHEMERAL znode on /<root>/ns
# *LN* blocks stop until receive NODE_LEFT event.
# *CRD* receives notification and reset watches on /<root>/ns
# *CRD* generate NODE_LEFT event.
# *LN* receives events and continue stop process
# *CRD* on receiving all acks checks that there is no nodes on /<root>/ns and 
/<root>/n
related to *LN* and remove them if they presents.


> Add support to graceful shutdown for ZookeeperDiscoverySpi
> ----------------------------------------------------------
>
>                 Key: IGNITE-13577
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13577
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Ivan Daschinskiy
>            Assignee: Ivan Daschinskiy
>            Priority: Major
>
> Proposed design:
> *LN* -- node that performs graceful shutdown
> *CRD* -- Leader (coordinator) of Ignite cluster
> *N* -- Other nodes of Ignite cluster.
> #  While elected, *CRD* set watches on /<root>/ns
> # *LN* create EPHEMERAL znode on /<root>/ns
> # *LN* blocks stop until receive NODE_LEFT event.
> # *CRD* receives notification and reset watches on /<root>/ns
> # *CRD* generate NODE_LEFT event.
> # *LN* receives events and continue stop process
> # *CRD* on receiving all acks checks that there is no nodes on /<root>/ns and 
> /<root>/n
> related to *LN* and remove them if they presents.



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