<!-- 
RSS generated by JIRA (9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66) at Thu Feb 08 06:40:34 UTC 2024

It is possible to restrict the fields that are returned in this document by specifying the 'field' parameter in your request.
For example, to request only the issue key and summary append 'field=key&field=summary' to the URL of your request.
-->
<rss version="0.92" >
<channel>
    <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>
    </build-info>


<item>
            <title>[SERVER-79274] FCV checks can be racy if FCV is uninitialized in between the checks</title>
                <link>https://jira.mongodb.org/browse/SERVER-79274</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For places in the codebase where we check the FCV in multiple places, this can be racy. For example, in FeatureFlag::isEnabled, &lt;br/&gt;
it performs a check here if fcv &lt;a href=&quot;https://github.com/10gen/mongo/blob/d13faac6def5a42bad3e1ac6d91d9d5ce805f0d2/src/mongo/db/feature_flag.cpp#L80&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;is initialized&lt;/a&gt; and tries to perform &lt;a href=&quot;https://github.com/10gen/mongo/blob/d13faac6def5a42bad3e1ac6d91d9d5ce805f0d2/src/mongo/db/feature_flag.cpp#L91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;comparison later&lt;/a&gt;. However, it is possible for fcv to be reset in between causing the comparison to be perfomed while fcv is not initialized.&lt;/p&gt;

&lt;p&gt;And example case where fcv can be uninitialized is when intial sync &lt;a href=&quot;https://github.com/10gen/mongo/blob/d13faac6def5a42bad3e1ac6d91d9d5ce805f0d2/src/mongo/db/repl/initial_syncer.cpp#L696&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;temporarily resets&lt;/a&gt; the value to uninitialized and sets the new value afterwards.&lt;/p&gt;

&lt;p&gt;This also applies to FCVServerStatusMetrics::generateSection and other instances where we check if FCV is initialized and then another FCV check that re-gets the FCV.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2399632">SERVER-79274</key>
            <summary>FCV checks can be racy if FCV is uninitialized in between the checks</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="huayu.ouyang@mongodb.com">Huayu Ouyang</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>repl-shortlist</label>
                    </labels>
                <created>Mon, 24 Jul 2023 21:11:59 +0000</created>
                <updated>Thu, 16 Nov 2023 18:48:58 +0000</updated>
                            <resolved>Wed, 8 Nov 2023 13:40:06 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                    <fixVersion>7.2.0-rc2</fixVersion>
                    <fixVersion>7.0.5</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5880535" author="xgen-internal-githook" created="Tue, 14 Nov 2023 22:41:13 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Huayu Ouyang&apos;, &apos;email&apos;: &apos;huayu.ouyang@mongodb.com&apos;, &apos;username&apos;: &apos;huayu-ouyang&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79274&quot; title=&quot;FCV checks can be racy if FCV is uninitialized in between the checks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79274&quot;&gt;&lt;del&gt;SERVER-79274&lt;/del&gt;&lt;/a&gt; Fix race where FCV is uninitialized in between FCV checks&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7ea05af8be392ca95bb2026e74179fbd386ba081&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7ea05af8be392ca95bb2026e74179fbd386ba081&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5877700" author="xgen-internal-githook" created="Tue, 14 Nov 2023 03:30:16 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Huayu Ouyang&apos;, &apos;email&apos;: &apos;huayu.ouyang@mongodb.com&apos;, &apos;username&apos;: &apos;huayu-ouyang&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79274&quot; title=&quot;FCV checks can be racy if FCV is uninitialized in between the checks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79274&quot;&gt;&lt;del&gt;SERVER-79274&lt;/del&gt;&lt;/a&gt; Fix race where FCV is uninitialized in between FCV checks&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a5da6271d5fd5afb83d0c90a0f641d006862494e)&lt;br/&gt;
Branch: v7.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3884d84f29804eb5702655e9b53d3473c6b0cc8b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3884d84f29804eb5702655e9b53d3473c6b0cc8b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5863220" author="xgen-internal-githook" created="Wed, 8 Nov 2023 05:40:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Huayu Ouyang&apos;, &apos;email&apos;: &apos;huayu.ouyang@mongodb.com&apos;, &apos;username&apos;: &apos;huayu-ouyang&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79274&quot; title=&quot;FCV checks can be racy if FCV is uninitialized in between the checks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79274&quot;&gt;&lt;del&gt;SERVER-79274&lt;/del&gt;&lt;/a&gt; Fix race where FCV is uninitialized in between FCV checks&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a5da6271d5fd5afb83d0c90a0f641d006862494e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a5da6271d5fd5afb83d0c90a0f641d006862494e&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10420">
                    <name>Backports</name>
                                            <outwardlinks description="backported by">
                                                        </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                                        </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="2470844">SERVER-82044</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2471779">SERVER-82087</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                                        </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="2400400">SERVER-79317</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2437586">SERVER-80901</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="2471779">SERVER-82087</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2151296">SERVER-70202</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                    </attachments>
                <subtasks>
                    </subtasks>
                <customfields>
                                                <customfield id="customfield_10050" key="com.atlassian.jira.toolkit:comments">
                        <customfieldname># Replies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>3.0</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18555" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname># of Sprints</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>3.0</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                    <customfield id="customfield_12751" key="com.atlassian.jira.plugin.system.customfieldtypes:multiselect">
                        <customfieldname>Assigned Teams</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="25128"><![CDATA[Replication]]></customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12450" key="com.atlassian.jira.plugin.system.customfieldtypes:multicheckboxes">
                        <customfieldname>Backport Requested</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="26553"><![CDATA[v7.2]]></customfieldvalue>
    <customfieldvalue key="25578"><![CDATA[v7.0]]></customfieldvalue>
    <customfieldvalue key="23470"><![CDATA[v6.0]]></customfieldvalue>
    <customfieldvalue key="21777"><![CDATA[v5.0]]></customfieldvalue>
    <customfieldvalue key="18953"><![CDATA[v4.4]]></customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10011" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Backwards Compatibility</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10038"><![CDATA[Fully Compatible]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                            <customfield id="customfield_10055" key="com.atlassian.jira.ext.charting:firstresponsedate">
                        <customfieldname>Date of 1st Reply</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>Thu, 26 Oct 2023 17:02:30 +0000</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10052" key="com.atlassian.jira.toolkit:dayslastcommented">
                        <customfieldname>Days since reply</customfieldname>
                        <customfieldvalues>
                                        12 weeks, 1 day ago
    
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18254" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Dependencies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue><![CDATA[]]></customfieldvalue>


                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_15850" key="com.atlassian.jira.plugins.jira-development-integration-plugin:devsummary">
                        <customfieldname>Development</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_17050" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Downstream Team Attention</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="16941"><![CDATA[Not Needed]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                <customfield id="customfield_10057" key="com.atlassian.jira.toolkit:lastusercommented">
                        <customfieldname>Last comment by Customer</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>true</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10056" key="com.atlassian.jira.toolkit:lastupdaterorcommenter">
                        <customfieldname>Last commenter</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>maria.prinus@mongodb.com</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_11151" key="com.atlassian.jira.toolkit:LastCommentDate">
                        <customfieldname>Last public comment date</customfieldname>
                        <customfieldvalues>
                            12 weeks, 1 day ago
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_16465" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Linked BF Score</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>153.0</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_10032" key="com.atlassian.jira.plugin.system.customfieldtypes:select">
                        <customfieldname>Operating System</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10026"><![CDATA[ALL]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_10051" key="com.atlassian.jira.toolkit:participants">
                        <customfieldname>Participants</customfieldname>
                        <customfieldvalues>
                                        <customfieldvalue>xgen-internal-githook</customfieldvalue>
            <customfieldvalue>huayu.ouyang@mongodb.com</customfieldvalue>
            <customfieldvalue>randolph@mongodb.com</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_14254" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Product Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|i2j91z:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12550" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2|i21dko:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10558" key="com.pyxis.greenhopper.jira:gh-global-rank">
                        <customfieldname>Rank (Obsolete)</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>9223372036854775807</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_23361" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Requested By</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                            <customfield id="customfield_22250" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Special Downgrade Instructions Required</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="23343"><![CDATA[Not Needed]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10557" key="com.pyxis.greenhopper.jira:gh-sprint">
                        <customfieldname>Sprint</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue id="7627">Repl 2023-09-04</customfieldvalue>
    <customfieldvalue id="7877">Repl 2023-10-30</customfieldvalue>
    <customfieldvalue id="7878">Repl 2023-11-13</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_10053" key="com.atlassian.jira.ext.charting:timeinstatus">
                        <customfieldname>Time In Status</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_22870" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Triagers</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_14350" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>serverRank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|i2iv7b:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                    </customfields>
    </item>
</channel>
</rss>