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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-83829] Mongos can incorrectly report WCE after a retry of WriteWithoutShardKeyWithID writes despite succeeding in second try</title>
                <link>https://jira.mongodb.org/browse/SERVER-83829</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Under PM-3190, as reported by &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaitlin.mahar%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;kaitlin.mahar@mongodb.com&quot;&gt;kaitlin.mahar@mongodb.com&lt;/a&gt; verbatim:&lt;/p&gt;


&lt;ol&gt;
	&lt;li&gt;we have two shards, shardA and shardB, and send the write to them both&lt;/li&gt;
	&lt;li&gt;shardA responds&#160;&#160;{&lt;tt&gt;ok: 1, n:0, writeConcernError: {&#8230;&lt;/tt&gt;}}&#160; and we save that write concern error&lt;/li&gt;
	&lt;li&gt;shardB responds with a StaleConfig error for the write.&lt;/li&gt;
	&lt;li&gt;given the StaleConfig error, we consider the response we got from shardA in step 2 to be out of date/invalidated, and so we retarget all shards anew.&lt;/li&gt;
	&lt;li&gt;after retargeting, say we get&#160;{{
{ok:1, n:1}
&lt;p&gt;}}&#160;back from shardA and&#160;{{&lt;/p&gt;
{ok:1, n:0}
&lt;p&gt;}}&#160;back from shardB&lt;/p&gt;&lt;/li&gt;
	&lt;li&gt;the final response, perhaps confusingly, is still going to contain the write concern error from step 2, even though we consider that write irrelevant at this point and ended up redoing it (and didn&#8217;t get a WC error the second time.)&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2514716">SERVER-83829</key>
            <summary>Mongos can incorrectly report WCE after a retry of WriteWithoutShardKeyWithID writes despite succeeding in second try</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="abdul.qadeer@mongodb.com">Abdul Qadeer</assignee>
                                    <reporter username="abdul.qadeer@mongodb.com">Abdul Qadeer</reporter>
                        <labels>
                    </labels>
                <created>Sat, 2 Dec 2023 01:00:17 +0000</created>
                <updated>Wed, 10 Jan 2024 18:45:19 +0000</updated>
                            <resolved>Wed, 10 Jan 2024 18:45:18 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="6001432" author="xgen-internal-githook" created="Wed, 10 Jan 2024 18:39:19 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Abdul Qadeer&apos;, &apos;email&apos;: &apos;abdul.qadeer@mongodb.com&apos;, &apos;username&apos;: &apos;zorro786&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-83829&quot; title=&quot;Mongos can incorrectly report WCE after a retry of WriteWithoutShardKeyWithID writes despite succeeding in second try&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-83829&quot;&gt;&lt;del&gt;SERVER-83829&lt;/del&gt;&lt;/a&gt; Defer WCE errors for WriteWithoutShardKeyWithId (#17930)&lt;/p&gt;

&lt;p&gt;GitOrigin-RevId: 2a53d7cb226d1912f154aa59563759148795f28a&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/04f19bb61aba10577658947095020f00ac1403c4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/04f19bb61aba10577658947095020f00ac1403c4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5923255" author="kaitlin.mahar" created="Mon, 4 Dec 2023 15:28:06 +0000"  >&lt;p&gt;I am fixing this on the bulkWrite codepath in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-83463&quot; title=&quot;Support new PM-3190 update/delete broadcast protocol for bulkWrite in bulk_write_exec&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-83463&quot;&gt;&lt;del&gt;SERVER-83463&lt;/del&gt;&lt;/a&gt;, however a similar fix will be needed in the batch_write_exec codepath taken by the update and delete commands.&lt;/p&gt;</comment>
                            <comment id="5919861" author="JIRAUSER1269163" created="Sat, 2 Dec 2023 01:05:10 +0000"  >&lt;p&gt;This scenario is possible for no-op writes. A solution would be to mark the WCE in a broadcast and later clear it if any further retry has to happen for the write.&lt;/p&gt;</comment>
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