[jira] [Assigned] (IGNITE-17976) Throw correct exception on KeyValueView#get in case of lost majority

["Alexander Lapin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-17976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexander Lapin reassigned IGNITE-17976:
----------------------------------------

    Assignee: Alexander Lapin

> Throw correct exception on KeyValueView#get in case of lost majority
> --------------------------------------------------------------------
>
>                 Key: IGNITE-17976
>                 URL: https://issues.apache.org/jira/browse/IGNITE-17976
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Mirza Aliev
>            Assignee: Alexander Lapin
>            Priority: Major
>              Labels: ignite-3
>
> *Scenario*:
> Start two nodes, populate data, stop node, try to {{table.keyValueView().get}} value. 
> *Expected behaviour*: 
> Exception is thrown. We should throw TransactionException with error code, that we don't have an actor, who can handle that request. Also we need to add a root cause to the exception whether it was lost majority, or the reason is the replica unavailability etc. 
> *Actual behaviour*: 
> We can caught {{ReplicationTimeoutException}}, {{TransactionException}}, {{IgniteException}}. Sometimes we fail with {{NullPointerException}}, the reason is because we can stop leader of some partition, and for two nodes it is impossible to elect new leader, so we get null in {{InternalTableImpl#enlist}} when we try to get {{svc.refreshAndGetLeaderWithTerm();}}
> The problem can be reproduced in the test {{ItIgniteNodeRestartTest#testOneNodeRestartWithGap}}, which was muted using this ticket.



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