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    <link>https://jira.mongodb.org</link>
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    <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-61127] Multi-writes may exhaust the number of retry attempts in the presence of ongoing chunk migrations</title>
                <link>https://jira.mongodb.org/browse/SERVER-61127</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Multi-writes in a sharded cluster (&lt;tt&gt;updateMany:true&lt;/tt&gt; and &lt;tt&gt;justOne:false&lt;/tt&gt; for deletes) do not perform version checking on account that they are broadcast to all nodes in the sharded cluster. Such operations attach the special value &lt;tt&gt;ChunkVersion::IGNORED&lt;/tt&gt; to indicate that an operation is coming from a router (as opposed to direct connection to a shard), but that the shard must not perform version checking, under the assumption that the caller knows what they are doing.&lt;/p&gt;

&lt;p&gt;However, &lt;tt&gt;ChunkVersion::IGNORED&lt;/tt&gt; still triggers a StaleShardVersion exception in the case where the shardVersion is UNKNOWN or if the shard is in a critical section.&lt;/p&gt;

&lt;p&gt;The former is not a big problem, since it only happens once for the duration of a shard&apos;s MongoD process, but the latter is problematic since it may exhaust the 10 retry attempts that we allow on the router.&lt;/p&gt;

&lt;p&gt;This ticket is to come-up with a scheme so that multi-writes&apos; StaleShardVersion exceptions be retried at the level of the shard and not bubble up all the way up to the router.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1913690">SERVER-61127</key>
            <summary>Multi-writes may exhaust the number of retry attempts in the presence of ongoing chunk migrations</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="jordi.serra-torrens@mongodb.com">Jordi Serra Torrens</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                    </labels>
                <created>Sat, 30 Oct 2021 10:27:44 +0000</created>
                <updated>Sun, 29 Oct 2023 21:46:41 +0000</updated>
                            <resolved>Thu, 9 Jun 2022 08:22:03 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                    <fixVersion>6.0.8</fixVersion>
                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="5533704" author="xgen-internal-githook" created="Thu, 29 Jun 2023 13:37:55 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61127&quot; title=&quot;Multi-writes may exhaust the number of retry attempts in the presence of ongoing chunk migrations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61127&quot;&gt;&lt;del&gt;SERVER-61127&lt;/del&gt;&lt;/a&gt; Retry multi-writes that hit StaleConfig due to critical section on the shard&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 824b9b7e608687ba0db7af2d5ccc5b6811a46720)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3d84c0dd4e5d99be0d69003652313e7eaf4cdd74&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3d84c0dd4e5d99be0d69003652313e7eaf4cdd74&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4603915" author="xgen-internal-githook" created="Thu, 9 Jun 2022 08:20:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jordi Serra Torrens&apos;, &apos;email&apos;: &apos;jordi.serra-torrens@mongodb.com&apos;, &apos;username&apos;: &apos;jordist&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61127&quot; title=&quot;Multi-writes may exhaust the number of retry attempts in the presence of ongoing chunk migrations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61127&quot;&gt;&lt;del&gt;SERVER-61127&lt;/del&gt;&lt;/a&gt; Retry multi-writes that hit StaleConfig due to critical section on the shard&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/824b9b7e608687ba0db7af2d5ccc5b6811a46720&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/824b9b7e608687ba0db7af2d5ccc5b6811a46720&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4386237" author="JIRAUSER1263826" created="Wed, 2 Mar 2022 14:20:29 +0000"  >&lt;p&gt;na&lt;/p&gt;</comment>
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