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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-8950] Getlasterror call return wrong result when the previous write op has chunk splitt</title>
                <link>https://jira.mongodb.org/browse/SERVER-8950</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The reason from the source code:&lt;br/&gt;
1. update/insert invoke chunk splitting;&lt;br/&gt;
2. splitIfShould call ShardConnection::sync();&lt;br/&gt;
3. sync function send getlasterror command to the shard;&lt;br/&gt;
4. then the shard exec splitting;&lt;br/&gt;
5. when our api call getlasterror later, we will get wrong result&lt;/p&gt;</description>
                <environment></environment>
        <key id="68098">SERVER-8950</key>
            <summary>Getlasterror call return wrong result when the previous write op has chunk splitt</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="hustchensi">chensi</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 Mar 2013 08:43:01 +0000</created>
                <updated>Wed, 13 Mar 2013 16:41:32 +0000</updated>
                            <resolved>Tue, 12 Mar 2013 12:50:11 +0000</resolved>
                                    <version>2.0.7</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="288238" author="scotthernandez" created="Wed, 13 Mar 2013 16:41:32 +0000"  >&lt;p&gt;I believe that case has been fixed as well. Can you please upgrade to 2.2.3 if you need this fix.&lt;/p&gt;

&lt;p&gt;If you are able to reproduce this on 2.2.3 or above please let use know.&lt;/p&gt;</comment>
                            <comment id="287788" author="hustchensi" created="Wed, 13 Mar 2013 02:56:32 +0000"  >&lt;p&gt;sorry, I don&apos;t mean that. In my case, the getlasterror correctly went to the write Shard, but the lasterror information is reset because Split issuse ShardConnection::sync() operation. So when the api calls getlasterror, the result is not wanted. The following is the getlasterror result when i update record:&lt;/p&gt;

{&quot;singleShard&quot;:&quot;shard2\/10.36.69.34:7111,10.38.148.37:7111,10.48.89.56:7111&quot;,&quot;n&quot;:0,&quot;lastOp&quot;:5853335336846884895,&quot;connectionId&quot;:100937,&quot;err&quot;:null,&quot;ok&quot;:1}

&lt;p&gt;the &quot;n&quot; field is *&lt;b&gt;0&lt;/b&gt;* , and &quot;updatedExisting&quot; field is *&lt;b&gt;missing&lt;/b&gt;* , not expected by api.&lt;/p&gt;</comment>
                            <comment id="287121" author="scotthernandez" created="Tue, 12 Mar 2013 12:50:11 +0000"  >&lt;p&gt;I think you are describing &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; where the getLastError is mistakenly sent to the config servers after a split. There are a few other cases where getLastError is sent to the incorrect shard as well which we have fixed also.&lt;/p&gt;

&lt;p&gt;Please upgrade to get this fix and many others &amp;#8211; 2.4.0 will be released in the next 2 weeks and 2.2.3 is the current stable release with these fixes if you can&apos;t wait.&lt;/p&gt;</comment>
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