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    <title>MongoDB Jira</title>
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    <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-23625] Some read-only operations (eg count,aggregate) hang indefinitely if the primary for the shard is unreachable from mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-23625</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Even if you specify a &apos;secondary&apos; read preference, we still try to call setShardVersion on the primary when running count, agg, m/r, etc.  If the replica set monitor has already detected that the primary is unreachable then we skip the setShardVersion call and it works.  If we have not yet detected that the node we knew to once be primary has since become unreachable, we&apos;ll try to send setShardVersion to it, and that will hang forever.&lt;/p&gt;</description>
                <environment></environment>
        <key id="278566">SERVER-23625</key>
            <summary>Some read-only operations (eg count,aggregate) hang indefinitely if the primary for the shard is unreachable from mongos</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="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Apr 2016 22:35:10 +0000</created>
                <updated>Wed, 6 Feb 2019 17:25:38 +0000</updated>
                            <resolved>Wed, 6 Feb 2019 17:25:38 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2137253" author="blake.oler" created="Mon, 4 Feb 2019 20:27:00 +0000"  >&lt;p&gt;This has been fixed on the current master branch. Jason Carey&apos;s interruptibilty patch in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35679&quot; title=&quot;General Interruption Facility&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35679&quot;&gt;&lt;del&gt;SERVER-35679&lt;/del&gt;&lt;/a&gt; allows the AsyncRequestSender (the mechanism used to send commands from mongos to shards) to be interruptible. Spencer Brody&apos;s ShardRemote patch in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37329&quot; title=&quot;Allow ShardRemote to be interrupted while waiting for a response&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37329&quot;&gt;&lt;del&gt;SERVER-37329&lt;/del&gt;&lt;/a&gt; allows ShardRemote to be interruptible as well. These mechanisms are used for count, find, etc.&lt;/p&gt;

&lt;p&gt;Both of these changes are &lt;em&gt;only&lt;/em&gt; in the current working branch, meaning that maxTimeMS support is incomplete on previous releases. Do we seek to backport behavior to previous releases as part of this ticket &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt;?&lt;/p&gt;</comment>
                            <comment id="1230894" author="spencer" created="Fri, 8 Apr 2016 22:38:43 +0000"  >&lt;p&gt;Attaching jstest that reproduces the problem(s)&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="561660">SERVER-35679</issuekey>
        </issuelink>
                            </outwardlinks>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="276015">SERVER-23427</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="193234">SERVER-17825</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="234978">SERVER-21005</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="292257">SERVER-24457</issuekey>
        </issuelink>
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                            <attachment id="117117" name="primary_shard_server_blackholed_from_mongos.js" size="1991" author="spencer@mongodb.com" created="Fri, 8 Apr 2016 22:38:43 +0000"/>
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