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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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<item>
            <title>[SERVER-7472] Replication lag can cause cluster to hang in migration critical section</title>
                <link>https://jira.mongodb.org/browse/SERVER-7472</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In the critical section of a migration we check to make sure a majority of secondaries have received the migration writes.  If the secondaries fall behind at that point, it&apos;s possible for the migration to be stuck in the critical section for a long time (we timeout after 5 minutes).  During that time, however, the whole cluster can become unusable as setShardVersion commands will block until the shard is out of the critical section.&lt;/p&gt;</description>
                <environment></environment>
        <key id="54331">SERVER-7472</key>
            <summary>Replication lag can cause cluster to hang in migration critical section</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="9">Done</resolution>
                                        <assignee username="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Thu, 25 Oct 2012 14:49:37 +0000</created>
                <updated>Mon, 11 Jul 2016 17:59:00 +0000</updated>
                            <resolved>Fri, 16 Nov 2012 22:32:29 +0000</resolved>
                                    <version>2.2.0</version>
                                    <fixVersion>2.2.2</fixVersion>
                    <fixVersion>2.3.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="191780" author="auto" created="Fri, 16 Nov 2012 22:37:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-10-25T02:56:06Z&apos;, u&apos;email&apos;: u&apos;spencer@10gen.com&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;}
&lt;p&gt;Message: Decrease timeout on replication catching up in migration &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7472&quot; title=&quot;Replication lag can cause cluster to hang in migration critical section&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7472&quot;&gt;&lt;del&gt;SERVER-7472&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: v2.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cb2e7e34d5a2dddeba4eaffece4af7fadcf615a2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cb2e7e34d5a2dddeba4eaffece4af7fadcf615a2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="191764" author="auto" created="Fri, 16 Nov 2012 22:28:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-10-25T02:56:06Z&apos;, u&apos;email&apos;: u&apos;spencer@10gen.com&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;}
&lt;p&gt;Message: Decrease timeout on replication catching up in migration &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7472&quot; title=&quot;Replication lag can cause cluster to hang in migration critical section&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7472&quot;&gt;&lt;del&gt;SERVER-7472&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/35ca4d0f94dd5a6cbc091d18060b842ac2dff2ce&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/35ca4d0f94dd5a6cbc091d18060b842ac2dff2ce&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="179091" author="spencer" created="Thu, 25 Oct 2012 14:52:04 +0000"  >&lt;p&gt;We make sure all the main writes for the migration have happened before entering the critical section, so this can only happen if writes have been coming into that chunk during the migration AND those writes take a while to be replicated during the _transferMods phase of the migration.&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="54661">SERVER-7500</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
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                                        <issuelink>
            <issuekey id="52647">SERVER-7298</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="50453">SERVER-7034</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="54578">SERVER-7493</issuekey>
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