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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-5243] mongos will route getLastError command to the config server when last insert triggered a split</title>
                <link>https://jira.mongodb.org/browse/SERVER-5243</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Steps to reproduce:&lt;/p&gt;

&lt;p&gt;1. Setup a sharded cluster (to make this easier to reproduce, set chunk size to 1).&lt;br/&gt;
2. Keep on doing inserts and call get last error with a w parameter for each insert.&lt;/p&gt;

&lt;p&gt;Eventually (specifically, right when an auto-split occurred), the shards field for the getLastError result would contain the config server and will have a corresponding object that looks like:&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;	&quot;wnote&quot; : &quot;no replication has been enabled, so w=2+ won&apos;t work&quot;,&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Some of drivers treat a non-null err field as an error and would throw an exception, which is bad.&lt;/p&gt;</description>
                <environment></environment>
        <key id="32467">SERVER-5243</key>
            <summary>mongos will route getLastError command to the config server when last insert triggered a split</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="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Mar 2012 21:31:49 +0000</created>
                <updated>Mon, 11 Jul 2016 18:35:41 +0000</updated>
                            <resolved>Fri, 18 May 2012 20:33:46 +0000</resolved>
                                    <version>2.0.3</version>
                                    <fixVersion>2.1.2</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="121098" author="auto" created="Fri, 18 May 2012 20:30:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5243&quot; title=&quot;mongos will route getLastError command to the config server when last insert triggered a split&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5243&quot;&gt;&lt;del&gt;SERVER-5243&lt;/del&gt;&lt;/a&gt; mongos will route getLastError command to the config server when last insert triggered a split&lt;/p&gt;

&lt;p&gt;Added a guard to prevent callbacks for the ScopeDBConnection pool to add connections for getLastError.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/228b2aa0ab7203686bdfaac874f18645a159ecd8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/228b2aa0ab7203686bdfaac874f18645a159ecd8&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="29886">SERVER-4874</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="20800">SERVER-3568</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="68098">SERVER-8950</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="24827">SERVER-4267</issuekey>
        </issuelink>
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