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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-34733] mongos needs to also refresh db version after receiving onImplicitCreate error</title>
                <link>https://jira.mongodb.org/browse/SERVER-34733</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a mongos with stale db version tries to send a write to an unsharded collection to the wrong shard, it will trigger the onImplicit create error since the collection does not exist on the shard. It will perform a refresh on the collection version and retry again, but since the database version was not refreshed, it will be sent to the same wrong shard and hit the same error again. This will keep on happening until it ran out of retries.&lt;/p&gt;</description>
                <environment></environment>
        <key id="535428">SERVER-34733</key>
            <summary>mongos needs to also refresh db version after receiving onImplicitCreate error</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                            <label>sharding-wfbf-day</label>
                    </labels>
                <created>Fri, 27 Apr 2018 21:30:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:32:16 +0000</updated>
                            <resolved>Thu, 14 Feb 2019 18:09:18 +0000</resolved>
                                    <version>3.7.9</version>
                                    <fixVersion>4.1.9</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2149861" author="xgen-internal-githook" created="Thu, 14 Feb 2019 17:27:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Randolph Tan&apos;, &apos;email&apos;: &apos;randolph@10gen.com&apos;, &apos;username&apos;: &apos;renctan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34733&quot; title=&quot;mongos needs to also refresh db version after receiving onImplicitCreate error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34733&quot;&gt;&lt;del&gt;SERVER-34733&lt;/del&gt;&lt;/a&gt; mongos needs to also refresh db version after receiving onImplicitCreate error&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/055cc74476a7eedb7d51ccae06c46a9d25b80c5c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/055cc74476a7eedb7d51ccae06c46a9d25b80c5c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2142971" author="renctan" created="Fri, 8 Feb 2019 20:22:12 +0000"  >&lt;p&gt;sounds good to me&lt;/p&gt;</comment>
                            <comment id="2142934" author="kaloian.manassiev" created="Fri, 8 Feb 2019 20:01:00 +0000"  >&lt;p&gt;This is happening quite a bit (there are 200+ occurrences), so I am marking it as WFBF-day.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=renctan&quot; class=&quot;user-hover&quot; rel=&quot;renctan&quot;&gt;renctan&lt;/a&gt;, I am thinking if we add a check for &lt;tt&gt;CannotImplicitlyCreateCollection&lt;/tt&gt; at &lt;a href=&quot;https://github.com/mongodb/mongo/blob/7a7baa2539ec169335086e45c7d0b85ba7cdb877/src/mongo/s/write_ops/batch_write_exec.cpp#L308&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this point&lt;/a&gt; (or perhaps inside the targeter itself so we don&apos;t cause unit-test errors) and if there is an error, call &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8e5e745e98d33633e7d24a2629f22cdba79d9851/src/mongo/s/catalog_cache.h#L222&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;CatalogCache::invalidateDatabaseEntry()&lt;/tt&gt;&lt;/a&gt;, this should fix the issue. What do you think?&lt;/p&gt;</comment>
                            <comment id="1887054" author="kaloian.manassiev" created="Wed, 9 May 2018 14:48:19 +0000"  >&lt;p&gt;I am fine with moving this ticket to 4.1 Required, however we may have to live with the associated BF for a while. I am not sure how hard it is to pinpoint that this is the cause for an incoming BF vs doing this fix. Is it only one test which fails?&lt;/p&gt;</comment>
                            <comment id="1887047" author="renctan" created="Wed, 9 May 2018 14:45:04 +0000"  >&lt;p&gt;Note: this won&apos;t be needed once we finish the track unsharded collections project which is currently planned late 4.2.&lt;/p&gt;</comment>
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                            <attachment id="185186" name="db_ver.js" size="869" author="randolph@mongodb.com" created="Fri, 27 Apr 2018 21:31:18 +0000"/>
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