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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-39870] WTKVEngine::setOldestFromStable must not choose a time earlier than the initialDataTimestamp</title>
                <link>https://jira.mongodb.org/browse/SERVER-39870</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;tt&gt;initialDataTimestamp&lt;/tt&gt; is the earliest time the system knows the data to be consistent. &lt;tt&gt;setOldestTimestampFromStable&lt;/tt&gt; will intentionally lag the oldest timestamp a few seconds behind the stable timestamp to provide a window for reads to get in.&lt;/p&gt;

&lt;p&gt;At startup, the initialDataTimestamp will be set to the checkpoint timestamp. The system has no history before this time. However, &lt;tt&gt;setOldestFromStable&lt;/tt&gt; will communicate an earlier &lt;tt&gt;oldest_timestamp&lt;/tt&gt; to WiredTiger. This means a transaction with a &lt;tt&gt;read_timestamp&lt;/tt&gt; can come in that WT will allow, but does not have the history to correctly satisfy.&lt;/p&gt;</description>
                <environment></environment>
        <key id="705997">SERVER-39870</key>
            <summary>WTKVEngine::setOldestFromStable must not choose a time earlier than the initialDataTimestamp</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="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Feb 2019 19:03:09 +0000</created>
                <updated>Sun, 29 Oct 2023 22:23:28 +0000</updated>
                            <resolved>Thu, 11 Apr 2019 18:52:28 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2210107" author="xgen-internal-githook" created="Thu, 11 Apr 2019 18:52:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;username&apos;: &apos;dgottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39870&quot; title=&quot;WTKVEngine::setOldestFromStable must not choose a time earlier than the initialDataTimestamp&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39870&quot;&gt;&lt;del&gt;SERVER-39870&lt;/del&gt;&lt;/a&gt;: Guarantee the oldest timestamp obeys any initial data timestamp constraints.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/95bb948f7e5e573ca1473ba43dd6fd8e53cb5f50&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/95bb948f7e5e573ca1473ba43dd6fd8e53cb5f50&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2195177" author="suganthi.mani" created="Thu, 28 Mar 2019 20:12:46 +0000"  >&lt;p&gt;As a part of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39782&quot; title=&quot;Replaying prepared transaction writes for commit oplog entry during replication recovery and initial sync should set commit and durable timestamp  for those writes.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39782&quot;&gt;&lt;del&gt;SERVER-39782&lt;/del&gt;&lt;/a&gt;, to overcome the lag between stable and oldest timestamp during startup recovery, I added a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3d67051935b04db3d0a66202a8ebfcce793858de/jstests/replsets/commit_transaction_recovery_data_already_applied.js#L75-L77&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;workaround&lt;/a&gt;. You can remove it, once this lag issue is fixed.&lt;/p&gt;</comment>
                            <comment id="2195003" author="xgen-internal-githook" created="Thu, 28 Mar 2019 18:03:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;username&apos;: &apos;dgottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39870&quot; title=&quot;WTKVEngine::setOldestFromStable must not choose a time earlier than the initialDataTimestamp&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39870&quot;&gt;&lt;del&gt;SERVER-39870&lt;/del&gt;&lt;/a&gt;: Guarantee the oldest timestamp obeys any initial data timestamp constraints.&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit ef38b62f0de257cfa0c5a2940c67949b7402079b.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/00afe420f0eccb4204c5a235049385a1189e9c78&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/00afe420f0eccb4204c5a235049385a1189e9c78&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2194829" author="xgen-internal-githook" created="Thu, 28 Mar 2019 16:46:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;, &apos;username&apos;: &apos;dgottlieb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39870&quot; title=&quot;WTKVEngine::setOldestFromStable must not choose a time earlier than the initialDataTimestamp&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39870&quot;&gt;&lt;del&gt;SERVER-39870&lt;/del&gt;&lt;/a&gt;: Guarantee the oldest timestamp obeys any initial data timestamp constraints.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ef38b62f0de257cfa0c5a2940c67949b7402079b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ef38b62f0de257cfa0c5a2940c67949b7402079b&lt;/a&gt;&lt;/p&gt;</comment>
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