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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-72258] Audit and add missing checkForInterrupt to SBE stages</title>
                <link>https://jira.mongodb.org/browse/SERVER-72258</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Not all SBE stages that introduce unbounded iteration check for interrupts.&lt;/p&gt;

&lt;p&gt;Ideally, we would like to guarantee that during query execution that the interval between checkForInterrupt calls is bounded.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Proposed set of rules to achieve that:&lt;/p&gt;

&lt;p&gt;1) Stages that are source of iterations (scan, coscan, unwind, sort, group, spool) should perform checkForInterrupt at least once per unit of work / getNext.&#160;&lt;/p&gt;

&lt;p&gt;2) Prolonged blocking computation (like sorting) should also periodically perform checkForInterrupt.&lt;/p&gt;

&lt;p&gt;3) Stages that are not source of iteration (project, nlj, filter, limit, union, merge) don&apos;t need to perform checkForInterrupt, as long as they call a subtree methods that do.&lt;/p&gt;

&lt;p&gt;The &quot;source of iteration&quot; refers to stage ability to iterate over more than 1 row for each input row (if exists). Note: filter, nlj stages does introduce a loop, but it are not a source of iteration, as each input row maps to 0-1 output rows, rather than 0-N output rows like unwind.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2215310">SERVER-72258</key>
            <summary>Audit and add missing checkForInterrupt to SBE stages</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="10018" iconUrl="https://jira.mongodb.org/images/icons/statuses/visible.png" description="">In Code Review</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="anna.wawrzyniak@mongodb.com">Anna Wawrzyniak</assignee>
                                    <reporter username="anna.wawrzyniak@mongodb.com">Anna Wawrzyniak</reporter>
                        <labels>
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                <created>Mon, 19 Dec 2022 19:35:34 +0000</created>
                <updated>Wed, 7 Feb 2024 19:24:13 +0000</updated>
                                                                                                <votes>1</votes>
                                    <watches>6</watches>
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            <issuekey id="2565641">SERVER-86164</issuekey>
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