[jira] [Created] (IGNITE-18782) Snapshot restore might fail after cluster become active due to transition state

["Maksim Timonin (Jira)" <ji...@apache.org>]

Maksim Timonin created IGNITE-18782:
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             Summary: Snapshot restore might fail after cluster become active due to transition state
                 Key: IGNITE-18782
                 URL: https://issues.apache.org/jira/browse/IGNITE-18782
             Project: Ignite
          Issue Type: Bug
            Reporter: Maksim Timonin


`ign.cluster().state(ClusterState.ACTIVE)` activates cluster but after  this method returns some grid nodes might be in transition state - `ctx.state().clusterState().transition() == true`.

Ignite nodes checks the transition state before restoring snapshot, and then restoring procedure might fail.

Also, it looks  like `GridClusterStateProcessor#publicApiState(boolean waitForTransition)` doesn't check transition state. Example is  IgniteClusterSnapshotRestoreSelfTest#testUserClassRestored - it's required to explicitly check transition to start restoring snapshot, usage of the publicApiState call doesn't help. Maybe bug here?

There are some possible ways to fix it:
 # `state(ClusterState.ACTIVE)` should return after transition has fully completed
 # Snapshot restoring should await while transition state finished.



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