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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-25676] getLastError with write concern may return early after call to createIndexes on same connection</title>
                <link>https://jira.mongodb.org/browse/SERVER-25676</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The code for tracking the optime of the last write operation, specifically when that operation was index creation, has a bug on mongos that is exposed when the createIndexes command was forwarded to one or more shards using a new connection. Specifically, sometimes mongos will mistakenly believe that the optime of the createIndexes operation one or more shards was (0|0), causing waits for write concern &amp;gt;= w:2 to return too early.&lt;/p&gt;</description>
                <environment></environment>
        <key id="309871">SERVER-25676</key>
            <summary>getLastError with write concern may return early after call to createIndexes on same connection</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="schwerin@mongodb.com">Andy Schwerin</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Aug 2016 22:35:41 +0000</created>
                <updated>Tue, 6 Dec 2022 04:18:46 +0000</updated>
                            <resolved>Thu, 19 Dec 2019 14:26:01 +0000</resolved>
                                    <version>3.2.9</version>
                    <version>3.3.11</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2649710" author="sheeri.cabral" created="Thu, 19 Dec 2019 14:26:01 +0000"  >&lt;p&gt;Gone away as per Randolph&apos;s previous comment.&lt;/p&gt;</comment>
                            <comment id="1555383" author="renctan" created="Fri, 21 Apr 2017 22:18:17 +0000"  >&lt;p&gt;The specific bug &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt; mentioned on the last comment should no longer happen on master. The current master code will always use the exact host name for createIndex.&lt;/p&gt;</comment>
                            <comment id="1378788" author="schwerin" created="Wed, 7 Sep 2016 19:12:28 +0000"  >&lt;p&gt;This bug surfaces because the RunOnAllShards command framework uses DBClientRS to do targeting and execution of remote commands, and the sharding callback hooks installed there are sometimes invoked with the replica set connection string, and sometimes with the exact hostname. The best solution would be to rewrite the RunOnAllShards command framework to use the shard and host targeting frameworks developed for the 3.4 release.&lt;/p&gt;</comment>
                            <comment id="1362408" author="xgen-internal-githook" created="Fri, 19 Aug 2016 18:25:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25676&quot; title=&quot;getLastError with write concern may return early after call to createIndexes on same connection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25676&quot;&gt;&lt;del&gt;SERVER-25676&lt;/del&gt;&lt;/a&gt; Change name of replica set in create_index_gle.js to avoid bug.&lt;/p&gt;

&lt;p&gt;Until a proper fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25676&quot; title=&quot;getLastError with write concern may return early after call to createIndexes on same connection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25676&quot;&gt;&lt;del&gt;SERVER-25676&lt;/del&gt;&lt;/a&gt; is implemented, this change will prevent&lt;br/&gt;
the continuous build system from encountering it. This works because the&lt;br/&gt;
bug only manifests when a getLastError follows a call to createIndexes on&lt;br/&gt;
a sharded system where the shard replica set names appear before the&lt;br/&gt;
individual host names in the replica set in lexicographical order.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/784cc21ab3e7e44da724092178d56cec53ffab24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/784cc21ab3e7e44da724092178d56cec53ffab24&lt;/a&gt;&lt;/p&gt;</comment>
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