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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-24960] Shard may not realize that collection is already sharded after restart</title>
                <link>https://jira.mongodb.org/browse/SERVER-24960</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Until a mongos who knows that the collection is sharded informs the shard. The issue is that shards assume that collections are unsharded by default and it should double check with the config servers if this is the first time it sees a namespace and mongos sends a version of (0, 0|0).&lt;/p&gt;</description>
                <environment></environment>
        <key id="299690">SERVER-24960</key>
            <summary>Shard may not realize that collection is already sharded after restart</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>todo_in_code</label>
                    </labels>
                <created>Fri, 8 Jul 2016 19:30:33 +0000</created>
                <updated>Tue, 6 Dec 2022 04:21:54 +0000</updated>
                            <resolved>Fri, 10 Nov 2017 16:19:52 +0000</resolved>
                                    <version>2.6.4</version>
                    <version>3.0.9</version>
                    <version>3.3.9</version>
                    <version>3.4.2</version>
                    <version>3.5.4</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>14</watches>
                                                                                                                <comments>
                            <comment id="1722662" author="kaloian.manassiev" created="Fri, 10 Nov 2017 16:19:37 +0000"  >&lt;p&gt;Failure to refresh will not fassert, it will just keep failing queries.&lt;/p&gt;</comment>
                            <comment id="1722649" author="esha.maharishi@10gen.com" created="Fri, 10 Nov 2017 16:15:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kaloian.manassiev&quot; class=&quot;user-hover&quot; rel=&quot;kaloian.manassiev&quot;&gt;kaloian.manassiev&lt;/a&gt; hmm, yes I think so, since if a donor fails to refresh after a migration (issue described in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31056&quot; title=&quot;Remove all usages of the default constructor of ScopedCollectionMetadata outside of MetadataManager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31056&quot;&gt;&lt;del&gt;SERVER-31056&lt;/del&gt;&lt;/a&gt;), it will fassert and have to be restarted, which will then cause the issue in this ticket.&lt;/p&gt;</comment>
                            <comment id="1722640" author="kaloian.manassiev" created="Fri, 10 Nov 2017 16:07:36 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt;, can this be closed as duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31056&quot; title=&quot;Remove all usages of the default constructor of ScopedCollectionMetadata outside of MetadataManager&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31056&quot;&gt;&lt;del&gt;SERVER-31056&lt;/del&gt;&lt;/a&gt;?&lt;/p&gt;</comment>
                            <comment id="1522907" author="esha.maharishi@10gen.com" created="Mon, 13 Mar 2017 19:31:31 +0000"  >&lt;p&gt;Bringing this back into Needs Triage so we can decide whether this can be easily fixed in 3.6, or if it will be automatically fixed as part of either:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;moving metadata commands to the config server&lt;/li&gt;
	&lt;li&gt;changes to migrations under transactions&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;The query team believes the &quot;kickback&quot; or extra round trip from shard to mongos will cause a significant enough slow down for queries on views for users to start complaining.&lt;/p&gt;</comment>
                            <comment id="1344034" author="geert.bosch" created="Tue, 2 Aug 2016 02:46:18 +0000"  >&lt;p&gt;Removing from non-materialized views, as we worked around this issue by always treating everything as sharded.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                                        <issuelink>
            <issuekey id="469026">SERVER-32198</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
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                                        <issuelink>
            <issuekey id="336828">SERVER-27308</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="296333">SERVER-24762</issuekey>
        </issuelink>
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                            <attachment id="130121" name="zero_version.js" size="1087" author="randolph@mongodb.com" created="Fri, 8 Jul 2016 19:30:33 +0000"/>
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