[jira] [Assigned] (IGNITE-23747) Support timeouts for RO transactions

["Roman Puchkovskiy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-23747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Puchkovskiy reassigned IGNITE-23747:
------------------------------------------

    Assignee: Roman Puchkovskiy

> Support timeouts for RO transactions
> ------------------------------------
>
>                 Key: IGNITE-23747
>                 URL: https://issues.apache.org/jira/browse/IGNITE-23747
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Roman Puchkovskiy
>            Assignee: Roman Puchkovskiy
>            Priority: Major
>              Labels: ignite-3, important
>
> TransactionOptions allows to specify a transaction timeout, but the timeout is not handled; even more, if it's set, an attempt to start a transaction fails because timeouts are not supported yet.
> We should support timeouts for RO transactions.
> For an RO transaction, a timeout defines maximum amount of time the transaction can hold LWMs on nodes participating in the transaction. That is, on any such node its local LWM can be held/locked only until txBeginTime + txTimeout (txBeginTime can be extracted from transactionId).
> If the user did not specify a timeout in TransactionOptions or did not provide TransactionOptions when creating an RO transaction, a default timeout is used; it is to be defined, but cannot be infinite.
> Definition of done:
>  # It's possible to start an RO transaction with a timeout
>  # When registering an RO transaction with a local LWM, its timeout defines the moment when the registration will automatically be cancelled (allowing the LWM to proceed and making the transaction expired on this node)
>  # A default timeout is used if not provided by the user



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