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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-48255] Don&apos;t run waitForReplication hook while test is running a full collection validation</title>
                <link>https://jira.mongodb.org/browse/SERVER-48255</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Recently, full collection validation has started taking an exceptionally long time in the &lt;tt&gt;backup_restore&lt;/tt&gt; tests. Since the validate cmd will grab the PBWM lock, it will block oplog application, and end up timing out any calls to awaitReplication. Ideally, we should be able to fix this by improving the performance of collection validation, but a quicker fix might be to see if we can avoid calling awaitReplication while in a validate cmd.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1353023">SERVER-48255</key>
            <summary>Don&apos;t run waitForReplication hook while test is running a full collection validation</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="13203">Gone away</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="jason.chan@mongodb.com">Jason Chan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 May 2020 22:27:20 +0000</created>
                <updated>Fri, 27 Oct 2023 20:42:13 +0000</updated>
                            <resolved>Tue, 26 May 2020 17:19:01 +0000</resolved>
                                    <version>4.5 Required</version>
                    <version>4.4 Required</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3107558" author="jason.chan" created="Tue, 26 May 2020 18:18:13 +0000"  >&lt;p&gt;We closed this since we expect &lt;a href=&quot;https://jira.mongodb.org/browse/WT-6229&quot; title=&quot;Fix memory growth bug during MDB shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-6229&quot;&gt;&lt;del&gt;WT-6229&lt;/del&gt;&lt;/a&gt; to have fixed the underlying issue of validation being too slow.&lt;/p&gt;</comment>
                            <comment id="3092912" author="suganthi.mani" created="Mon, 18 May 2020 16:35:40 +0000"  >&lt;p&gt;FYI, awaitReplication is called as part of the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/cbd23d40077b148f94ba74fef49198b287e51747/buildscripts/resmokeconfig/suites/concurrency_replication_for_backup_restore.yml#L47&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;waitForReplication&lt;/a&gt; background hook. Also, we call full collection validation by default when the node &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a7f769dd597e33e988832c43c99912c1d3139c9b/src/mongo/shell/servers.js#L1018&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;shuts down&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;Another alternative is that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/cbd23d40077b148f94ba74fef49198b287e51747/jstests/noPassthrough/libs/backup_restore.js#L268&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;secondary backup node  shutdown&lt;/a&gt; can call rst.stop method using &lt;em&gt;&lt;b&gt;skipValidation: true&lt;/b&gt;&lt;/em&gt; which will skip collection validation. This will assure we don&apos;t call collection validation when  fsm workload and WaitForReplication is in progress.&lt;/p&gt;</comment>
                            <comment id="3092897" author="jason.chan" created="Mon, 18 May 2020 16:32:31 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=suganthi.mani&quot; class=&quot;user-hover&quot; rel=&quot;suganthi.mani&quot;&gt;suganthi.mani&lt;/a&gt; points out that another alternative is to switch to use a background validation in these tests, but this would require the changes to be made in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47681&quot; title=&quot;Background validation uses the kNoOverlap read source instead of kAllDurableSnapshot to prevent us from having to take the PBWM lock on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47681&quot;&gt;&lt;del&gt;SERVER-47681&lt;/del&gt;&lt;/a&gt;, and we will also lose the coverage provided by &lt;tt&gt;full:true&lt;/tt&gt;.&lt;/p&gt;</comment>
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