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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-45354] In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps</title>
                <link>https://jira.mongodb.org/browse/SERVER-45354</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we rename a collection across databases, we internally copy it.  The copy operation writes multiple documents within a write unit of work without reserving timestamps, which results in wrong timestamps.  We need to make sure the timestamps are written correctly.&lt;/p&gt;

&lt;p&gt;It is possible that this could just be a matter of using write_ops_exec insertDocuments rather than writing the documents in a loop and directly calling Collection::insertDocument.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1075016">SERVER-45354</key>
            <summary>In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps</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="3">Duplicate</resolution>
                                        <assignee username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                            <label>newgrad</label>
                    </labels>
                <created>Fri, 3 Jan 2020 18:30:33 +0000</created>
                <updated>Fri, 16 Oct 2020 23:58:40 +0000</updated>
                            <resolved>Fri, 2 Oct 2020 16:46:37 +0000</resolved>
                                                    <fixVersion>4.4.2</fixVersion>
                    <fixVersion>4.2.11</fixVersion>
                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="3450455" author="xgen-internal-githook" created="Fri, 16 Oct 2020 23:28:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45354&quot; title=&quot;In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45354&quot;&gt;&lt;del&gt;SERVER-45354&lt;/del&gt;&lt;/a&gt; In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e8c373424c6bd0460198b9a94936369e0a83b6f5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e8c373424c6bd0460198b9a94936369e0a83b6f5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3436098" author="xgen-internal-githook" created="Fri, 9 Oct 2020 04:04:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45354&quot; title=&quot;In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45354&quot;&gt;&lt;del&gt;SERVER-45354&lt;/del&gt;&lt;/a&gt; In renameCollectionAcrossDBs, writes to temporary collection must use correct timestamps&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f955f22b43229a73ff788127bd37ce651ad6f75e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f955f22b43229a73ff788127bd37ce651ad6f75e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3423291" author="gregory.wlodarek" created="Fri, 2 Oct 2020 16:46:37 +0000"  >&lt;p&gt;This issue was fixed &lt;a href=&quot;https://github.com/mongodb/mongo/commit/bd60c43f3ba4917f6c0e5efb63efc8279cba6af9#diff-0d485a198951a0fce344345b300d44b0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; as part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48771&quot; title=&quot;Enforce constraints on &amp;quot;multi-timestamp&amp;quot; transactions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48771&quot;&gt;&lt;del&gt;SERVER-48771&lt;/del&gt;&lt;/a&gt;. Because this is causing BFs on earlier branches we should consider backporting that specific change to 4.0-&amp;gt;4.4.&lt;/p&gt;</comment>
                            <comment id="2705761" author="matthew.russotto" created="Mon, 6 Jan 2020 18:28:38 +0000"  >&lt;p&gt;After some consideration, we don&apos;t think this bug is normally user-visible.  It results in timestamped reads seeing inconsistency in the temporary collection during the copy, and if a rollback occurs on the primary may result in the temporary collection being inconsistent with the oplog.  However, on rollback the temporary collection will be removed anyway.  If the rename completes successfully (and is not rolled back), the final collection will always be consistent.&lt;/p&gt;</comment>
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