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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-56514] Tests with casual consistency do not wait for the indexes to finish building</title>
                <link>https://jira.mongodb.org/browse/SERVER-56514</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Consider the simple test:&lt;/p&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;const coll = db.test;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;coll.drop();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;coll.createIndex(&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;/* geospatial index spec */&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;coll.insert(&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;/* documents with geospatial data */&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;);&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;coll.find(&lt;/span&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;/* query using $near, $nearSphere or $geoNear */&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;).toArray();&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;Let us try to execute this test in &lt;tt&gt;replica_sets_multi_stmt_txn_terminate_primary_jscore_passthrough&lt;/tt&gt; suite. Network overrides will add &lt;tt&gt;w: &quot;majority&quot;&lt;/tt&gt; to the &lt;tt&gt;createIndex&lt;/tt&gt; command &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ff6b2f2877a0721cd631acaa2057e491ebd8c846/jstests/libs/override_methods/network_error_and_txn_override.js#L500&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. With these settings, the following timeline of execution is possible on MongoDB version 4.2:&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/320944/320944_1.jpg&quot; width=&quot;700&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;First of all, we have 3-node replica set. node2 is Primary, all other nodes are Secondaries. Test issues &lt;tt&gt;createIndexes&lt;/tt&gt; command, it arrives on Primary and command waits until the index is successfully built. To satisfy &lt;tt&gt;&quot;majority&quot;&lt;/tt&gt; write concern, command is replicated to the node1. As soon as command is replicated, &lt;tt&gt;createIndexes&lt;/tt&gt; command returns with success. It does not wait for node1 to finish the index build.&lt;/p&gt;

&lt;p&gt;After the &lt;tt&gt;createIndexes&lt;/tt&gt; command, the test suite issues a stepdown of Primary, which triggers a re-election. node1 is now selected as Primary. Note that the index build on node1 is still in progress.&lt;/p&gt;

&lt;p&gt;After the new Primary was selected, test issues a find command with &lt;tt&gt;$near&lt;/tt&gt;, &lt;tt&gt;$nearSphere&lt;/tt&gt; or &lt;tt&gt;$geoNear&lt;/tt&gt; operator. All these operators &lt;b&gt;require&lt;/b&gt; a geospatial index to work. Since the geospatial index on the current Primary node1 is still building, it is not available for querying. Since there is no geospatial index available, query fails.&lt;/p&gt;

&lt;p&gt;Note that starting from version 4.4 &lt;tt&gt;createIndexes&lt;/tt&gt; with write concern &lt;tt&gt;&quot;majority&quot;&lt;/tt&gt; actually waits for the index to finish building on the majority of nodes. So the affected versions are 4.2 and earlier.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1697326">SERVER-56514</key>
            <summary>Tests with casual consistency do not wait for the indexes to finish building</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="nikita.lapkov@mongodb.com">Nikita Lapkov</assignee>
                                    <reporter username="nikita.lapkov@mongodb.com">Nikita Lapkov</reporter>
                        <labels>
                    </labels>
                <created>Fri, 30 Apr 2021 14:14:32 +0000</created>
                <updated>Sun, 29 Oct 2023 21:54:14 +0000</updated>
                            <resolved>Fri, 2 Jul 2021 15:36:30 +0000</resolved>
                                    <version>4.0.0</version>
                    <version>4.2.0</version>
                                    <fixVersion>4.2 Required</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3901040" author="xgen-internal-githook" created="Fri, 25 Jun 2021 17:17:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Nikita Lapkov&apos;, &apos;email&apos;: &apos;nikita.lapkov@mongodb.com&apos;, &apos;username&apos;: &apos;laplab&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56514&quot; title=&quot;Tests with casual consistency do not wait for the indexes to finish building&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56514&quot;&gt;&lt;del&gt;SERVER-56514&lt;/del&gt;&lt;/a&gt; Add causally_consistent_index_builds override to replica_sets_multi_stmt_txn_terminate_primary_jscore_passthrough suite&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1b5e10ddfd3f70cd28c14c496fc58836f7442f85&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1b5e10ddfd3f70cd28c14c496fc58836f7442f85&lt;/a&gt;&lt;/p&gt;</comment>
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