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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-30589] Don&apos;t add stable timestamp candidates when in master slave mode</title>
                <link>https://jira.mongodb.org/browse/SERVER-30589</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When running in Master-Slave mode, the replication &quot;commit point&quot; never advances, since there is no consensus protocol used in this mode. For replication recovery and rollback purposes, in the ReplicationCoordinator we maintain a list of &quot;stableTimestampCandidates&quot; which is updated with a new timestamp every time we update our lastApplied optime. The current &quot;stable&quot; timestamp is calculated as the largest timestamp in this list less than the commit point. We will remove timestamps from this list when they are less than the current stable timestamp. If we add timestamps to this list, but the commit point never advances, then the stableTimestampCandidates list will grow unbounded. This can cause performance issues as this list grows and we keep trying to insert things to it every time an operation comes in. This was causing a test to timeout when we insert a few hundred thousand documents (see linked BF). &lt;/p&gt;

&lt;p&gt;To fix this, we should check if we are running in master slave mode and refrain from updating the stable timestamp list if so.&lt;/p&gt;</description>
                <environment></environment>
        <key id="415017">SERVER-30589</key>
            <summary>Don&apos;t add stable timestamp candidates when in master slave mode</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="william.schultz@mongodb.com">William Schultz</assignee>
                                    <reporter username="william.schultz@mongodb.com">William Schultz</reporter>
                        <labels>
                    </labels>
                <created>Thu, 10 Aug 2017 17:19:23 +0000</created>
                <updated>Mon, 30 Oct 2023 23:14:27 +0000</updated>
                            <resolved>Fri, 11 Aug 2017 11:13:44 +0000</resolved>
                                                    <fixVersion>3.5.12</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1646429" author="xgen-internal-githook" created="Fri, 11 Aug 2017 17:12:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30589&quot; title=&quot;Don&amp;#39;t add stable timestamp candidates when in master slave mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30589&quot;&gt;&lt;del&gt;SERVER-30589&lt;/del&gt;&lt;/a&gt; Don&apos;t add stable timestamp candidates when in master slave mode&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3a6f7017c2577af96c377f1500998565737952e6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3a6f7017c2577af96c377f1500998565737952e6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1645556" author="xgen-internal-githook" created="Thu, 10 Aug 2017 20:01:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;William Schultz&apos;, &apos;username&apos;: &apos;will62794&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30589&quot; title=&quot;Don&amp;#39;t add stable timestamp candidates when in master slave mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30589&quot;&gt;&lt;del&gt;SERVER-30589&lt;/del&gt;&lt;/a&gt; Dont update stable timestamp candidates in master slave mode&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 53db8a7a0cde13aa0c54c6979843faac7fa8332e.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/803beb68404bd6b0b678ac698b7f2011a64dab12&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/803beb68404bd6b0b678ac698b7f2011a64dab12&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1645420" author="william.schultz" created="Thu, 10 Aug 2017 18:20:10 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=milkie&quot; class=&quot;user-hover&quot; rel=&quot;milkie&quot;&gt;milkie&lt;/a&gt; Yes, it seems this could also be an issue in that case. We should probably discuss, generally, the performance impacts of this list growing very large, and how much we are worried about mitigating those impacts.&lt;/p&gt;</comment>
                            <comment id="1645411" author="xgen-internal-githook" created="Thu, 10 Aug 2017 18:14:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;will62794&apos;, &apos;email&apos;: &apos;william.schultz@mongodb.com&apos;, &apos;name&apos;: &apos;William Schultz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30589&quot; title=&quot;Don&amp;#39;t add stable timestamp candidates when in master slave mode&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30589&quot;&gt;&lt;del&gt;SERVER-30589&lt;/del&gt;&lt;/a&gt; Dont update stable timestamp candidates in master slave mode&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/53db8a7a0cde13aa0c54c6979843faac7fa8332e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/53db8a7a0cde13aa0c54c6979843faac7fa8332e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1645348" author="milkie" created="Thu, 10 Aug 2017 17:24:21 +0000"  >&lt;p&gt;Is this a problem for replica sets where the commit level doesn&apos;t move?&lt;/p&gt;</comment>
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