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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>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-61108] ReshardingCoordinatorService, Config Collection Deletes Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion</title>
                <link>https://jira.mongodb.org/browse/SERVER-61108</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Same as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61052&quot; title=&quot;Resharding Donor &amp;amp; Recipient&amp;#39;s Coordinator Doc Updates Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61052&quot;&gt;&lt;del&gt;SERVER-61052&lt;/del&gt;&lt;/a&gt;, we need to create a  kWriteConcernMajority constant for the ReshardingCoordinatorService&lt;/p&gt;</description>
                <environment></environment>
        <key id="1913182">SERVER-61108</key>
            <summary>ReshardingCoordinatorService, Config Collection Deletes Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion</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="luis.osta@mongodb.com">Luis Osta</assignee>
                                    <reporter username="luis.osta@mongodb.com">Luis Osta</reporter>
                        <labels>
                            <label>sharding-nyc-subteam1</label>
                    </labels>
                <created>Fri, 29 Oct 2021 14:28:11 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:43 +0000</updated>
                            <resolved>Fri, 29 Oct 2021 19:44:59 +0000</resolved>
                                    <version>5.0.0</version>
                    <version>5.1.0-rc2</version>
                                    <fixVersion>5.2.0</fixVersion>
                    <fixVersion>5.0.4</fixVersion>
                    <fixVersion>5.1.0-rc3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4160207" author="xgen-internal-githook" created="Mon, 1 Nov 2021 13:39:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Luis Osta&apos;, &apos;email&apos;: &apos;luis.osta@mongodb.com&apos;, &apos;username&apos;: &apos;LuisOsta&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61108&quot; title=&quot;ReshardingCoordinatorService, Config Collection Deletes Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61108&quot;&gt;&lt;del&gt;SERVER-61108&lt;/del&gt;&lt;/a&gt; Remove wtimeout from resharding coordinator write concern&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b2531ed72eb81c7a9e4951e4aab93c7d190d3023)&lt;br/&gt;
Branch: v5.1&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1ea5111a46f570d9b805a504d824c6dddff2462c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1ea5111a46f570d9b805a504d824c6dddff2462c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4160206" author="xgen-internal-githook" created="Mon, 1 Nov 2021 13:39:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Luis Osta&apos;, &apos;email&apos;: &apos;luis.osta@mongodb.com&apos;, &apos;username&apos;: &apos;LuisOsta&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61108&quot; title=&quot;ReshardingCoordinatorService, Config Collection Deletes Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61108&quot;&gt;&lt;del&gt;SERVER-61108&lt;/del&gt;&lt;/a&gt; Remove wtimeout from resharding coordinator write concern&lt;/p&gt;

&lt;p&gt;(cherry picked from commit b2531ed72eb81c7a9e4951e4aab93c7d190d3023)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/91e154e718db6f1f4031e3a279a007dfaf063429&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/91e154e718db6f1f4031e3a279a007dfaf063429&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4158124" author="xgen-internal-githook" created="Fri, 29 Oct 2021 19:43:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Luis Osta&apos;, &apos;email&apos;: &apos;luis.osta@mongodb.com&apos;, &apos;username&apos;: &apos;LuisOsta&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61108&quot; title=&quot;ReshardingCoordinatorService, Config Collection Deletes Can Time Out Waiting for Replication on Coordinator Doc, Leading to Fatal Assertion&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61108&quot;&gt;&lt;del&gt;SERVER-61108&lt;/del&gt;&lt;/a&gt; Remove wtimeout from resharding coordinator write concern&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b2531ed72eb81c7a9e4951e4aab93c7d190d3023&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b2531ed72eb81c7a9e4951e4aab93c7d190d3023&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4157297" author="max.hirschhorn@10gen.com" created="Fri, 29 Oct 2021 14:57:15 +0000"  >&lt;p&gt;Also it may be worth noting it isn&apos;t required (nor really encouraged) that ReshardingCoordinator uses &quot;majority&quot; write concern for its local writes. PrimaryOnlyService guarantees all of the writes done by a particular Instance occur within a single term. Using {w: 1} and having writes follow writes would be sufficient &lt;em&gt;so long as&lt;/em&gt; the ReshardingCoordinator waits for the changes to be majority&amp;#45;committed before attempting to contact the remote shards (e.g. when communicating its decision).&lt;/p&gt;

&lt;p&gt;We don&apos;t allow a cluster to run multiple resharding operations so blocking the thread synchronously isn&apos;t a big deal. I&apos;d therefore rather leave the structure of things in the ReshardingCoordinator as&amp;#45;is. We can look to shift the ReshardingCoordinator over to using &lt;a href=&quot;https://github.com/mongodb/mongo/blob/116469f19e778e69c42fd868815f36e2f455cf36/src/mongo/db/s/resharding/resharding_donor_service.cpp#L74&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;kNoWaitWriteConcern&lt;/tt&gt;&lt;/a&gt; and &lt;a href=&quot;https://github.com/mongodb/mongo/blob/116469f19e778e69c42fd868815f36e2f455cf36/src/mongo/db/s/resharding/resharding_donor_service.cpp#L904-L905&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WaitForMajorityService::waitUntilMajority()&lt;/a&gt; as part of some later refactoring. The risk to value tradeoff isn&apos;t good enough to warrant doing it now.&lt;/p&gt;</comment>
                            <comment id="4157244" author="max.hirschhorn@10gen.com" created="Fri, 29 Oct 2021 14:44:04 +0000"  >&lt;p&gt;We&apos;ll also want to change &lt;a href=&quot;https://github.com/mongodb/mongo/blob/116469f19e778e69c42fd868815f36e2f455cf36/src/mongo/db/s/resharding/resharding_coordinator_service.cpp#L558&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;makeFlushRoutingTableCacheUpdatesCmd()&lt;/a&gt; because &lt;a href=&quot;https://github.com/mongodb/mongo/blob/116469f19e778e69c42fd868815f36e2f455cf36/src/mongo/db/commands.cpp#L84&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;CommandHelpers::appendMajorityWriteConcern() adds a wtimeout of 60 seconds&lt;/a&gt; by default.&lt;/p&gt;</comment>
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