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https://issues.apache.org/jira/browse/IGNITE-21115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kirill Tkalenko reassigned IGNITE-21115:
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Assignee: Kirill Tkalenko
> 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
>
>
> 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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