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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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            <title>[SERVER-27000] mongos running shardCollection distlock acquisition attempt timed out after 20 seconds due to config primary stepdowns in the stepdown suite</title>
                <link>https://jira.mongodb.org/browse/SERVER-27000</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;shardCollection runs ReplSetDistLockManager::lockWithSessionID on the mongos with a 20 second time limit. This function does a lot of network calls, so it is far more liable to time out if run remotely with network calls to the config servers.&lt;/p&gt;</description>
                <environment></environment>
        <key id="331279">SERVER-27000</key>
            <summary>mongos running shardCollection distlock acquisition attempt timed out after 20 seconds due to config primary stepdowns in the stepdown suite</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="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="9">Done</resolution>
                                        <assignee username="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Fri, 11 Nov 2016 15:59:11 +0000</created>
                <updated>Tue, 6 Dec 2022 04:11:58 +0000</updated>
                            <resolved>Wed, 4 Oct 2017 17:56:02 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1689265" author="dianna.hohensee" created="Wed, 4 Oct 2017 17:55:41 +0000"  >&lt;p&gt;This issue was resolved by moving the shardCollection command to the config server in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29107&quot; title=&quot;move shardCollection logic into new _configsvrShardCollection command on config server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29107&quot;&gt;&lt;del&gt;SERVER-29107&lt;/del&gt;&lt;/a&gt;. Closing.&lt;/p&gt;</comment>
                            <comment id="1474562" author="dianna.hohensee" created="Wed, 11 Jan 2017 15:44:15 +0000"  >&lt;p&gt;The problem is that attempting to take the distlock on the mongos is taking too long, times out and fails. The DistLockManager is running on the mongos and may need to do several networks calls.&lt;/p&gt;

&lt;p&gt;The solution is to move shardCollection to the config server, where the &apos;distlock&apos; can be taken very quickly and reliably without network calls.&lt;/p&gt;

&lt;p&gt;Technically, we could move the DistLockManager logic to run on the config, rather than the mongos, and that would also help a little, but not as much. Plus, we want to get rid of distributed locks, not rework them.&lt;/p&gt;</comment>
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