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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-12234] MongoS connections that persist across an upgrade become stale and can cause subsequent operations to fail</title>
                <link>https://jira.mongodb.org/browse/SERVER-12234</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After an upgrade of a sharded cluster, the MongoS&apos; connections to the newly-restarted MongoDs are stale.  If subsequent operations are performed before the stale connections are flushed from the pool, then the operations can fail.&lt;/p&gt;

&lt;p&gt;The attached test case works because it sleeps for 5 seconds after the upgrade (allowing some stale connections to be reaped), and then retries connecting to run its count() operation.  If the retry wrapper (the assert.soon()) is removed, the count() fails because the first connection it uses is still stale.&lt;/p&gt;</description>
                <environment></environment>
        <key id="104385">SERVER-12234</key>
            <summary>MongoS connections that persist across an upgrade become stale and can cause subsequent operations to fail</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="3">Duplicate</resolution>
                                        <assignee username="greg_10gen">Greg Studer</assignee>
                                    <reporter username="sam.helman@10gen.com">sam.helman@10gen.com</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Thu, 2 Jan 2014 19:43:08 +0000</created>
                <updated>Mon, 5 May 2014 19:18:05 +0000</updated>
                            <resolved>Wed, 29 Jan 2014 15:31:53 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
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                            <attachment id="35850" name="upgrade_cluster.js" size="2704" author="sam.helman@10gen.com" created="Thu, 2 Jan 2014 19:43:08 +0000"/>
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