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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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-30714] Handle step down error in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook</title>
                <link>https://jira.mongodb.org/browse/SERVER-30714</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;_shardingOnTransitionToPrimaryHook&lt;/tt&gt; callback is invoked when a node becomes a primary. If that node is part of a sharded cluster, it will execute the &quot;ShardingStateRecovery&quot; step, which reads from disk the optime of the last write that the node performed against the config server (where such a write is the chunk migration commit).&lt;/p&gt;

&lt;p&gt;The &lt;tt&gt;_shardingOnTransitionToPrimaryHook&lt;/tt&gt; step is executed after the &lt;tt&gt;replMutex&lt;/tt&gt; has been unlocked and because of this, it is possible that the node can actually lose the majority quorum and never become primary. Since the &quot;ShardingStateRecovery&quot; step performs majority reads it will fail in this case, which in turn will crash replication step-up with assert 40107.&lt;/p&gt;

&lt;p&gt;Since this is an expected situation, the sharding code should handle it appropriately.&lt;/p&gt;</description>
                <environment></environment>
        <key id="417576">SERVER-30714</key>
            <summary>Handle step down error in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Thu, 17 Aug 2017 14:59:13 +0000</created>
                <updated>Mon, 30 Oct 2023 23:14:13 +0000</updated>
                            <resolved>Wed, 26 Sep 2018 07:57:44 +0000</resolved>
                                    <version>3.5.11</version>
                                    <fixVersion>4.0.5</fixVersion>
                    <fixVersion>4.1.4</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2081767" author="xgen-internal-githook" created="Wed, 5 Dec 2018 20:44:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30714&quot; title=&quot;Handle step down error in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30714&quot;&gt;&lt;del&gt;SERVER-30714&lt;/del&gt;&lt;/a&gt; Handle &apos;not master&apos; errors in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a0ebd4bb3a30fdf574fd08ab473e7d6ce1b59619)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8bd1c5d455ae101d7522a5c2918738601f8c6317&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8bd1c5d455ae101d7522a5c2918738601f8c6317&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2014512" author="xgen-internal-githook" created="Wed, 26 Sep 2018 07:46:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kaloian Manassiev&apos;, &apos;email&apos;: &apos;kaloian.manassiev@mongodb.com&apos;, &apos;username&apos;: &apos;kaloianm&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30714&quot; title=&quot;Handle step down error in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30714&quot;&gt;&lt;del&gt;SERVER-30714&lt;/del&gt;&lt;/a&gt; Handle &apos;not master&apos; errors in ReplicationCoordinatorExternalStateImpl::_shardingOnTransitionToPrimaryHook&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a0ebd4bb3a30fdf574fd08ab473e7d6ce1b59619&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a0ebd4bb3a30fdf574fd08ab473e7d6ce1b59619&lt;/a&gt;&lt;/p&gt;</comment>
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