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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-40316] Wait for index build to complete in secondary_reads_timestamp_visibility.js</title>
                <link>https://jira.mongodb.org/browse/SERVER-40316</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We cannot expect the lastApplied to move forward (because of the failpoint), so if the completion of the index build moves the minVisibleSnapshot ahead of it, we will block while trying to read from the secondary. We need to ensure that the build completes before we activate the failpoint.&lt;/p&gt;</description>
                <environment></environment>
        <key id="721439">SERVER-40316</key>
            <summary>Wait for index build to complete in secondary_reads_timestamp_visibility.js</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="vesselina.ratcheva@mongodb.com">Vesselina Ratcheva</assignee>
                                    <reporter username="vesselina.ratcheva@mongodb.com">Vesselina Ratcheva</reporter>
                        <labels>
                    </labels>
                <created>Fri, 22 Mar 2019 22:21:15 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:40 +0000</updated>
                            <resolved>Mon, 1 Apr 2019 22:43:42 +0000</resolved>
                                                    <fixVersion>4.1.10</fixVersion>
                                    <component>Replication</component>
                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2198524" author="xgen-internal-githook" created="Mon, 1 Apr 2019 22:42:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;vesselina.ratcheva@10gen.com&apos;, &apos;name&apos;: &apos;Vesselina Ratcheva&apos;, &apos;username&apos;: &apos;vessy-mongodb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40316&quot; title=&quot;Wait for index build to complete in secondary_reads_timestamp_visibility.js&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40316&quot;&gt;&lt;del&gt;SERVER-40316&lt;/del&gt;&lt;/a&gt; Wait for index build to complete in secondary_reads_timestamp_visibility.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/75fa5cc276248362c0d6337a54ff38a0bac0b59b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/75fa5cc276248362c0d6337a54ff38a0bac0b59b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2195804" author="louis.williams" created="Fri, 29 Mar 2019 13:02:10 +0000"  >&lt;p&gt;FYI, we should be able to call &lt;a href=&quot;https://github.com/mongodb/mongo/blob/ecbc5b9f60d3801d968df5a29ea65edc421bb046/src/mongo/shell/replsettest.js#L1493&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;waitForAllIndexBuildsToFinish()&lt;/a&gt; where we call awaitReplication().&lt;/p&gt;</comment>
                            <comment id="2193501" author="vesselina.ratcheva" created="Wed, 27 Mar 2019 17:56:54 +0000"  >&lt;p&gt;To clarify, we specifically want the secondary to have finished building the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bb2a44643e2638b0850bcca8d11f88351f780642/jstests/replsets/secondary_reads_timestamp_visibility.js#L31&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;index&lt;/a&gt;. We otherwise risk having the index build finish after the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/be65d84da8e84ea99a1075339bd49a23a688d756/src/mongo/db/repl/sync_tail.cpp#L1381&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;failpoint&lt;/a&gt; has been hit, which is undesirable as that would move the minimum visible snapshot ahead of the last applied. We can&apos;t read  ahead of the lastApplied and behind the minimum visible snapshot, so in this case we block on the PBWM to conflict with batch application (see &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bb2a44643e2638b0850bcca8d11f88351f780642/src/mongo/db/db_raii.cpp#L171&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;). However. the PBWM is held while the failpoint is activated, so there&apos;s no way to acquire it. &lt;/p&gt;</comment>
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