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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-78554] search commands run over PinnedConnectionTaskExecutor can retry before the underlying connection pool processes initial failure</title>
                <link>https://jira.mongodb.org/browse/SERVER-78554</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;$search commands are now retried once in mongod when they fail due to network errors. The infrastructure they run on is obligated to tell the ConnectionPool about the networking error, so that the ConnectionPool can react to information about the un-reachability of the host/issues with sockets to that host.&#160;&lt;/p&gt;

&lt;p&gt;Since &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77195&quot; title=&quot;executor::ConnectionPool should appropriately handle the case where a connection is returned with a network error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77195&quot;&gt;&lt;del&gt;SERVER-77195&lt;/del&gt;&lt;/a&gt;, the ConnectionPool will react to most such reported network errors by closing current-generation connections to the remote as the driver CMAP spec specifies, and open a new generation of connections for future requests.&#160;&lt;/p&gt;

&lt;p&gt;When using NetworkInterfaceTL to run the RPC/$search, it is guaranteed that the ConnectionPool receives the notification of the NetworkError before the $search/RPC can be retried, which ensures that the retry uses a connection from the new generation. However, with the PinnedConnectionTaskExecutor, there is a race condition where there is the potential for the retry to happen before the ConnectionPool is notified of the error.&lt;/p&gt;

&lt;p&gt;This isn&apos;t strictly a correctness issue, but our testing assumes that the retry will get a healthy connection, which might not be true if the request sneaks in before the pool closes current-gen connections, because it also fails pending requests as a part of that process. So we should fix either the behavior or the test.&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2380741">SERVER-78554</key>
            <summary>search commands run over PinnedConnectionTaskExecutor can retry before the underlying connection pool processes initial failure</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="george.wangensteen@mongodb.com">George Wangensteen</assignee>
                                    <reporter username="george.wangensteen@mongodb.com">George Wangensteen</reporter>
                        <labels>
                    </labels>
                <created>Thu, 29 Jun 2023 20:45:02 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:23 +0000</updated>
                            <resolved>Fri, 7 Jul 2023 13:23:36 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc8</fixVersion>
                    <fixVersion>6.0.9</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5558119" author="xgen-internal-githook" created="Tue, 11 Jul 2023 17:47:53 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@mongodb.com&apos;, &apos;username&apos;: &apos;gewa24&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78554&quot; title=&quot;search commands run over PinnedConnectionTaskExecutor can retry before the underlying connection pool processes initial failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78554&quot;&gt;&lt;del&gt;SERVER-78554&lt;/del&gt;&lt;/a&gt; PinnedConnectionTaskExecutor destroys unhealthy stream before notifying of command completion    (cherry picked from commit b33a9c90e78ae15c7d27f0d57acad1bb04fc7bff)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/765b955671d340c6f35b64416a96ed213295c197&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/765b955671d340c6f35b64416a96ed213295c197&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5557609" author="xgen-internal-githook" created="Tue, 11 Jul 2023 15:18:30 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@mongodb.com&apos;, &apos;username&apos;: &apos;gewa24&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78554&quot; title=&quot;search commands run over PinnedConnectionTaskExecutor can retry before the underlying connection pool processes initial failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78554&quot;&gt;&lt;del&gt;SERVER-78554&lt;/del&gt;&lt;/a&gt; PinnedConnectionTaskExecutor destroys unhealthy stream before notifying of command comletion&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b33a9c90e78ae15c7d27f0d57acad1bb04fc7bff)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6b5b68ebaf86c86db033df14b9d1a51b91c161f1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6b5b68ebaf86c86db033df14b9d1a51b91c161f1&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5549383" author="xgen-internal-githook" created="Fri, 7 Jul 2023 00:50:35 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;George Wangensteen&apos;, &apos;email&apos;: &apos;george.wangensteen@mongodb.com&apos;, &apos;username&apos;: &apos;gewa24&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78554&quot; title=&quot;search commands run over PinnedConnectionTaskExecutor can retry before the underlying connection pool processes initial failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78554&quot;&gt;&lt;del&gt;SERVER-78554&lt;/del&gt;&lt;/a&gt; PinnedConnectionTaskExecutor destroys unhealthy stream before notifying of command comletion&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b33a9c90e78ae15c7d27f0d57acad1bb04fc7bff&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b33a9c90e78ae15c7d27f0d57acad1bb04fc7bff&lt;/a&gt;&lt;/p&gt;</comment>
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