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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-53609] lastCommittedTransaction section causes frequent schema changes that limit FTDC retention</title>
                <link>https://jira.mongodb.org/browse/SERVER-53609</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;serverStatus.transactions.lastCommittedTransaction.writeConcern records the write concern of the last committed transaction. This subdocument does not have a fixed schema: it may be empty or not, and the w field may be either a string or a number. This causes frequent schema changes for FTDC, and that can severely limit FTDC retention.&lt;/p&gt;

&lt;p&gt;A record of the last committed transaction has limited diagnostic value, so the best solution may be to omit the entire lastCommittedTransaction section from FTDC.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1582274">SERVER-53609</key>
            <summary>lastCommittedTransaction section causes frequent schema changes that limit FTDC retention</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="jason.chan@mongodb.com">Jason Chan</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                    </labels>
                <created>Wed, 6 Jan 2021 14:22:12 +0000</created>
                <updated>Sun, 29 Oct 2023 21:59:06 +0000</updated>
                            <resolved>Fri, 8 Jan 2021 17:16:56 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                    <fixVersion>4.0.23</fixVersion>
                    <fixVersion>4.4.4</fixVersion>
                    <fixVersion>4.2.13</fixVersion>
                                    <component>Diagnostics</component>
                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="3600764" author="xgen-internal-githook" created="Fri, 5 Feb 2021 01:23:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@mongodb.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53609&quot; title=&quot;lastCommittedTransaction section causes frequent schema changes that limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53609&quot;&gt;&lt;del&gt;SERVER-53609&lt;/del&gt;&lt;/a&gt; Filter out serverStatus.transactions.lastCommittedTransaction from FTDC&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3e5fc29b410b4a0e999f190de5f035e3119f6565)&lt;br/&gt;
(cherry picked from commit 97f5866b751246f4b035ebe1cff7ac371e2430fa)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7883bfe8349b4439f55fd8d4199fab1455b6d67d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7883bfe8349b4439f55fd8d4199fab1455b6d67d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3600311" author="xgen-internal-githook" created="Thu, 4 Feb 2021 21:34:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@mongodb.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53609&quot; title=&quot;lastCommittedTransaction section causes frequent schema changes that limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53609&quot;&gt;&lt;del&gt;SERVER-53609&lt;/del&gt;&lt;/a&gt; Filter out serverStatus.transactions.lastCommittedTransaction from FTDC&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3e5fc29b410b4a0e999f190de5f035e3119f6565)&lt;br/&gt;
Branch: v4.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/97f5866b751246f4b035ebe1cff7ac371e2430fa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/97f5866b751246f4b035ebe1cff7ac371e2430fa&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3585451" author="xgen-internal-githook" created="Wed, 27 Jan 2021 18:10:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jason Chan&apos;, &apos;email&apos;: &apos;jason.chan@mongodb.com&apos;, &apos;username&apos;: &apos;jasonjhchan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53609&quot; title=&quot;lastCommittedTransaction section causes frequent schema changes that limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53609&quot;&gt;&lt;del&gt;SERVER-53609&lt;/del&gt;&lt;/a&gt; Filter out serverStatus.transactions.lastCommittedTransaction from FTDC&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3e5fc29b410b4a0e999f190de5f035e3119f6565)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6f74f6f0e9f85d55f7c9b5d217d583f9bba308db&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6f74f6f0e9f85d55f7c9b5d217d583f9bba308db&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3556490" author="ian@10gen.com" created="Sat, 9 Jan 2021 18:11:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: u&apos;evrg-bot-webhook&apos;, &apos;name&apos;: u&apos;Jason Chan&apos;, &apos;email&apos;: u&apos;jason.chan@mongodb.com&apos;}
&lt;p&gt;Message:&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53609&quot; title=&quot;lastCommittedTransaction section causes frequent schema changes that limit FTDC retention&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53609&quot;&gt;&lt;del&gt;SERVER-53609&lt;/del&gt;&lt;/a&gt; Filter out serverStatus.transactions.lastCommittedTransaction from FTDC&lt;br/&gt;
Branch:master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3e5fc29b410b4a0e999f190de5f035e3119f6565&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3e5fc29b410b4a0e999f190de5f035e3119f6565&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3550814" author="judah.schvimer" created="Wed, 6 Jan 2021 16:54:33 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47528&quot; title=&quot;Presence of initialSyncStatus in replSetGetStatus consumes too much FTDC space&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47528&quot;&gt;&lt;del&gt;SERVER-47528&lt;/del&gt;&lt;/a&gt; is a similar example of removing a section from FTDC that took up too much space (a slightly different motivation but same goal).&lt;/p&gt;</comment>
                            <comment id="3550438" author="bruce.lucas@10gen.com" created="Wed, 6 Jan 2021 14:25:55 +0000"  >&lt;p&gt;I&apos;ve assigned this to the replication team to start since that&apos;s where the section originated via &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40298&quot; title=&quot;Track transaction size on 4.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40298&quot;&gt;&lt;del&gt;SERVER-40298&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40372&quot; title=&quot;Track transaction size on 4.2+&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40372&quot;&gt;&lt;del&gt;SERVER-40372&lt;/del&gt;&lt;/a&gt;, but I suspect this might ultimately need work both in replication and in ftdc code.&lt;/p&gt;</comment>
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