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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-34864] String-valued fields should not participate in schema change detection in ftdc</title>
                <link>https://jira.mongodb.org/browse/SERVER-34864</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are various string-valued informational messages in serverStatus which may or may not be present depending on whether the condition they are informing about is present. If this presence of this field changes between samples this is detected by ftdc as a change in schema, causing a new chunk to be started. If this varies rapidly, e.g. every few seconds, then chunks are very short, causing a large decrease in compression efficiency, and therefore a decrease in ftdc retention. This is especially problematic because ftdc is likely to be important in diagnosing the issue.&lt;/p&gt;

&lt;p&gt;Since string-valued fields don&apos;t contribute to ftdc, there&apos;s no reason that a change in the presence of a string valued field should be considered a schema change.&lt;/p&gt;</description>
                <environment></environment>
        <key id="540240">SERVER-34864</key>
            <summary>String-valued fields should not participate in schema change detection in ftdc</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                            <label>dev_tools</label>
                    </labels>
                <created>Mon, 7 May 2018 15:08:50 +0000</created>
                <updated>Sun, 29 Oct 2023 22:32:02 +0000</updated>
                            <resolved>Thu, 23 Aug 2018 19:26:04 +0000</resolved>
                                                    <fixVersion>3.4.18</fixVersion>
                    <fixVersion>3.6.9</fixVersion>
                    <fixVersion>4.0.3</fixVersion>
                    <fixVersion>4.1.3</fixVersion>
                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2008095" author="xgen-internal-githook" created="Wed, 19 Sep 2018 18:00:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34864&quot; title=&quot;String-valued fields should not participate in schema change detection in ftdc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34864&quot;&gt;&lt;del&gt;SERVER-34864&lt;/del&gt;&lt;/a&gt; FTDC should ignore irrelevant schema changes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 078d6b49548d90880556af6f55e3baf8b4709917)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7476443dd1282b83a9822833685917afcf7dcd2c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7476443dd1282b83a9822833685917afcf7dcd2c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2006642" author="xgen-internal-githook" created="Tue, 18 Sep 2018 16:04:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34864&quot; title=&quot;String-valued fields should not participate in schema change detection in ftdc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34864&quot;&gt;&lt;del&gt;SERVER-34864&lt;/del&gt;&lt;/a&gt; FTDC should ignore irrelevant schema changes&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/abdcd822a41b0e019279fae4a235b8c4a26c9668&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/abdcd822a41b0e019279fae4a235b8c4a26c9668&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2005882" author="xgen-internal-githook" created="Mon, 17 Sep 2018 22:57:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34864&quot; title=&quot;String-valued fields should not participate in schema change detection in ftdc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34864&quot;&gt;&lt;del&gt;SERVER-34864&lt;/del&gt;&lt;/a&gt; FTDC should ignore irrelevant schema changes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 078d6b49548d90880556af6f55e3baf8b4709917)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a845bcf20059b548ca8f1b4a51b8b4bd0512fa59&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a845bcf20059b548ca8f1b4a51b8b4bd0512fa59&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2005798" author="xgen-internal-githook" created="Mon, 17 Sep 2018 22:37:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34864&quot; title=&quot;String-valued fields should not participate in schema change detection in ftdc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34864&quot;&gt;&lt;del&gt;SERVER-34864&lt;/del&gt;&lt;/a&gt; FTDC should ignore irrelevant schema changes&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 078d6b49548d90880556af6f55e3baf8b4709917)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/95e012addfec1a6a0cb0ea656708a97b72b3848f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/95e012addfec1a6a0cb0ea656708a97b72b3848f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1984190" author="xgen-internal-githook" created="Thu, 23 Aug 2018 19:17:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34864&quot; title=&quot;String-valued fields should not participate in schema change detection in ftdc&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34864&quot;&gt;&lt;del&gt;SERVER-34864&lt;/del&gt;&lt;/a&gt; FTDC should ignore irrelevant schema changes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/078d6b49548d90880556af6f55e3baf8b4709917&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/078d6b49548d90880556af6f55e3baf8b4709917&lt;/a&gt;&lt;/p&gt;</comment>
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