[jira] [Updated] (IGNITE-21115) Wait for completion of transactions started before index appearance

["Kirill Tkalenko (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-21115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kirill Tkalenko updated IGNITE-21115:
-------------------------------------
    Reviewer: Ivan Bessonov  (was: Roman Puchkovskiy)

> Wait for completion of transactions started before index appearance
> -------------------------------------------------------------------
>
>                 Key: IGNITE-21115
>                 URL: https://issues.apache.org/jira/browse/IGNITE-21115
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Roman Puchkovskiy
>            Assignee: Kirill Tkalenko
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-beta2
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When an index is created (and appears in the REGISTERED state), we must wait for all transactions started on schemas before the index has appeared to finish.
> Primary replica of the partition zero of the table owning the created index is responsible for the wait.
>  # When a node sees appearance of a REGISTERED index state in the Catalog, and it’s a primary of partition zero of the table owning the index, it starts the waiter
>  # When a node becomes the primary of the partition zero of a table, and the table contains indices that are in the REGISTERED state (at the moment of the primary lease start), it starts a waiter per each such index
>  # When a node ceases to be the primary of the partition zero of a table, it stops all the waiters it started
>  # When the waiter finishes its waiting and the node is still a primary, it switches the index to the BACKFILLING state
> h5. Waiter operation
>  # Wait for HLC.now() to become greater than ActivationMoment(index REGISTERED state) + MaxClockSkew (to make sure that the REGISTERED state activates on each node in the cluster)
>  # Take all nodes in the cluster Logical Topology (LT) from the CMG Leader (not from the local state delivered by CMG learners) and put it in the *Nodes* list. ({*}Nodes{*} contains all the nodes that might have started RW transactions on schemas before the index appeared; other nodes had either left the topology, or they can only coordinate RW transactions started on schema versions containing the index)
> Poll each node in the *Nodes* list until either its RwTransactionsFinished(V) (see IGNITE-21112) returns true (where V is the catalog version where the index had appeared) or the node leaves the LT (if the node leaves the Physical Topology, we proceed waiting till it falls off the LT).
> After the waiter finishes, we must switch the index to the BACKFILLING state.



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