[jira] [Resolved] (IGNITE-20501) Calcite engine. Memory leak in MailboxRegistryImpl#remotes on JOINs

["Aleksey Plekhanov (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-20501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Plekhanov resolved IGNITE-20501.
----------------------------------------
    Fix Version/s: 2.16
     Release Note: SQL Calcite: Fixed memory leak in MailboxRegistryImpl#remotes
       Resolution: Fixed

[~ivandasch], thanks for the review! Merged to master.

> Calcite engine. Memory leak in MailboxRegistryImpl#remotes on JOINs
> -------------------------------------------------------------------
>
>                 Key: IGNITE-20501
>                 URL: https://issues.apache.org/jira/browse/IGNITE-20501
>             Project: Ignite
>          Issue Type: Bug
>            Reporter: Aleksey Plekhanov
>            Assignee: Aleksey Plekhanov
>            Priority: Major
>              Labels: calcite, ise
>             Fix For: 2.16
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> When JOIN relational operator is executed, downstream of JOIN can be closed if only one side of JOIN is already drained (see last lines of {{MergeJoinNode.InnerJoin#join}}, for example). In this case query can be prematurely closed, and after this, message for another side of join can arrive and register new {{Inbox}} (see {{ExchangeServiceImpl#onMessage(UUID, QueryBatchMessage)}}), that never will be unregistered. 



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