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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-71764] Implement cancellation contract for async_rpc operations</title>
                <link>https://jira.mongodb.org/browse/SERVER-71764</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We now have a defined cancellation contract that the async_rpc API should implement:&#160;&lt;/p&gt;

&lt;p&gt;The RPC library should append an OperationKey (GUID) to all operations it sends. When those operations are canceled, if networking has begun for that operation (i.e. any data may have been sent), the RPC unconditionally sends fire-and-forget _killOperations for that OperationKey to the same remote node.&#160;&lt;/p&gt;

&lt;p&gt;Since the library currently delegates to TaskExecutor/NetworkInterfaceTL to perform networking, implementing this cancellation contract will first involve cancelling any ongoing network interface operations, if they have begun. This is possible by simply using the cancellation token passed to the network interface, and should happen automatically if the async_rpc API&apos;s user cancels the token they passed in. Then, the async_rpc API should inspect the NetworkInterface operation response and see if it succeeded or successfully cancelled; if it succeeded, the async_rpc layer needs to send killOperations itself.&lt;/p&gt;

&lt;p&gt;If the NetworkInterface operation was cancelled successfully, the network interface may or may not have sent the required _killOperations. Here, we should do a short/timeboxed investigation on the best solution - one thing we could do is fix the network interface to always send _killOperations in this case, if that fix is small and simple. If it is not, we could have the async_rpc api always send it, even if it ends up being a duplicate _killOperations.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2199691">SERVER-71764</key>
            <summary>Implement cancellation contract for async_rpc operations</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</assignee>
                                    <reporter username="george.wangensteen@mongodb.com">George Wangensteen</reporter>
                        <labels>
                    </labels>
                <created>Thu, 1 Dec 2022 15:43:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:29:50 +0000</updated>
                            <resolved>Tue, 31 Jan 2023 16:00:18 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5153353" author="xgen-internal-githook" created="Tue, 31 Jan 2023 00:30:04 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71764&quot; title=&quot;Implement cancellation contract for async_rpc operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71764&quot;&gt;&lt;del&gt;SERVER-71764&lt;/del&gt;&lt;/a&gt; Fix cancellation of hedged operations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/911f78a88f7cc571b09ba0c67307bbf6d230a3b2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/911f78a88f7cc571b09ba0c67307bbf6d230a3b2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5136781" author="xgen-internal-githook" created="Tue, 24 Jan 2023 16:52:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71764&quot; title=&quot;Implement cancellation contract for async_rpc operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71764&quot;&gt;&lt;del&gt;SERVER-71764&lt;/del&gt;&lt;/a&gt; Fix cancellation of hedged operations&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 797beaa1ab13144548b94dc4b90d75ec05626e33.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/11b02687c7cc1afb0b7e91f8bd55323678db580e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/11b02687c7cc1afb0b7e91f8bd55323678db580e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5121918" author="xgen-internal-githook" created="Wed, 18 Jan 2023 20:01:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71764&quot; title=&quot;Implement cancellation contract for async_rpc operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71764&quot;&gt;&lt;del&gt;SERVER-71764&lt;/del&gt;&lt;/a&gt; Fix cancellation of hedged operations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/797beaa1ab13144548b94dc4b90d75ec05626e33&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/797beaa1ab13144548b94dc4b90d75ec05626e33&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2178740">SERVER-71194</issuekey>
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            <issuekey id="2236582">SERVER-73016</issuekey>
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            <issuekey id="2277878">SERVER-74466</issuekey>
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