<!-- 
RSS generated by JIRA (9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66) at Thu Feb 08 05:23:55 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-50890] Failure to persist migration coordinator document leads to hung migration</title>
                <link>https://jira.mongodb.org/browse/SERVER-50890</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When starting the cloning phase of a migration, the donor shard will &lt;a href=&quot;https://github.com/mongodb/mongo/blob/712013ffd49d76c699a5a0128f5605a10b497967/src/mongo/db/s/migration_coordinator.cpp#L112&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;insert a document into the &lt;tt&gt;config.migrationCoordinators&lt;/tt&gt; collection&lt;/a&gt;. If this fails and throws an exception, it will trigger &lt;a href=&quot;https://github.com/mongodb/mongo/blob/712013ffd49d76c699a5a0128f5605a10b497967/src/mongo/db/s/migration_source_manager.cpp#L215&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the MigrationSourceManager::cleanupOnError() scope guard&lt;/a&gt;, which will try to complete the migration by &lt;a href=&quot;https://github.com/mongodb/mongo/blob/712013ffd49d76c699a5a0128f5605a10b497967/src/mongo/db/s/migration_coordinator.cpp#L236&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;persisting an abort decision&lt;/a&gt; through an update to the document that failed to be inserted, which &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a70ac5e30e/src/mongo/db/persistent_task_store.h#L188-L191&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;will fail because there is no matching document&lt;/a&gt;. Persisting the decision &lt;a href=&quot;https://github.com/mongodb/mongo/blob/712013ffd49d76c699a5a0128f5605a10b497967/src/mongo/db/s/migration_util.cpp#L604&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;retries on errors until a stepdown or shutdown&lt;/a&gt;, so until that happens, the migration will hang trying to update the non-existent document.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;UPDATE&lt;/b&gt; fixing this issue exposed another problem, if a migration coordinator document is left without decision (like for example, because the document insert failed to honor the majority write concern) then another migration on the same session that increases the transaction number would cause the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/537641adca3ef2134c11322637b6bc4723af7611/src/mongo/db/s/migration_coordinator.cpp#L196&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;bump of the txnNumber&lt;/a&gt; to fail during the next recovery with a TransactionTooOld error, as can be seen on the &lt;a href=&quot;https://jira.mongodb.org/browse/BF-19447&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;linked BF&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1471327">SERVER-50890</key>
            <summary>Failure to persist migration coordinator document leads to hung migration</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="marcos.grillo@mongodb.com">Marcos Jos&#233; Grillo Ramirez</assignee>
                                    <reporter username="jack.mulrow@mongodb.com">Jack Mulrow</reporter>
                        <labels>
                            <label>PM-1645-Milestone-1</label>
                    </labels>
                <created>Fri, 11 Sep 2020 15:39:34 +0000</created>
                <updated>Sun, 29 Oct 2023 22:03:18 +0000</updated>
                            <resolved>Fri, 8 Jan 2021 19:06:19 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3555486" author="xgen-internal-githook" created="Fri, 8 Jan 2021 19:00:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Marcos Jos&#233; Grillo Ram&#237;rez&apos;, &apos;email&apos;: &apos;marcos.grillo@mongodb.com&apos;, &apos;username&apos;: &apos;m4nti5&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50890&quot; title=&quot;Failure to persist migration coordinator document leads to hung migration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50890&quot;&gt;&lt;del&gt;SERVER-50890&lt;/del&gt;&lt;/a&gt; Improve failover management when completing migrations&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/40aa110c655b6a3b562881c63d14a83c0848b3a0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/40aa110c655b6a3b562881c63d14a83c0848b3a0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3461347" author="jack.mulrow" created="Fri, 23 Oct 2020 15:47:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=matthew.saltz&quot; class=&quot;user-hover&quot; rel=&quot;matthew.saltz&quot;&gt;matthew.saltz&lt;/a&gt;, you&apos;re right. I changed it to donor shard.&lt;/p&gt;</comment>
                            <comment id="3461300" author="matthew.saltz" created="Fri, 23 Oct 2020 15:25:54 +0000"  >&lt;p&gt;Should that first sentence say &quot;the donor shard&quot;?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <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="1509247">SERVER-51472</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10520">
                    <name>Problem/Incident</name>
                                            <outwardlinks description="causes">
                                                        </outwardlinks>
                                                        </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>8.0</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>Fri, 16 Oct 2020 12:05:28 +0000</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10052" key="com.atlassian.jira.toolkit:dayslastcommented">
                        <customfieldname>Days since reply</customfieldname>
                        <customfieldvalues>
                                        3 years, 4 weeks, 5 days 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_10857" key="com.pyxis.greenhopper.jira:gh-epic-link">
                        <customfieldname>Epic Link</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>PM-1645</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>luke.bonanomi@mongodb.com</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_11151" key="com.atlassian.jira.toolkit:LastCommentDate">
                        <customfieldname>Last public comment date</customfieldname>
                        <customfieldvalues>
                            3 years, 4 weeks, 5 days ago
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_16465" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Linked BF Score</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>24.0</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>jack.mulrow@mongodb.com</customfieldvalue>
            <customfieldvalue>marcos.grillo@mongodb.com</customfieldvalue>
            <customfieldvalue>matthew.saltz@mongodb.com</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_14254" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Product Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hy5cf3:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12550" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2|hxrtzr:</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_10557" key="com.pyxis.greenhopper.jira:gh-sprint">
                        <customfieldname>Sprint</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue id="4254">Sharding 2020-10-19</customfieldvalue>
    <customfieldvalue id="4255">Sharding 2020-11-02</customfieldvalue>
    <customfieldvalue id="4256">Sharding 2020-11-16</customfieldvalue>
    <customfieldvalue id="4257">Sharding 2020-11-30</customfieldvalue>
    <customfieldvalue id="4258">Sharding 2020-12-14</customfieldvalue>
    <customfieldvalue id="4259">Sharding 2020-12-28</customfieldvalue>
    <customfieldvalue id="4482">Sharding 2021-01-11</customfieldvalue>
    <customfieldvalue id="4483">Sharding 2021-01-25</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|hy4yof:</customfieldvalue>

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