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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-43698] Don&apos;t allow atClusterTime where number of seconds in Timestamp is 0</title>
                <link>https://jira.mongodb.org/browse/SERVER-43698</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When specifying &lt;tt&gt;atClusterTime&lt;/tt&gt;, we will &lt;a href=&quot;https://github.com/mongodb/mongo/blob/bcd4b05d4138cd0c97cbd379756dc5bc84a5040d/src/mongo/db/storage/wiredtiger/wiredtiger_recovery_unit.cpp#L753&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;invariant&lt;/a&gt; if the seconds field of the provided timestamp is 0 (since that is the same as the timestamp being null). We should do validation for this sooner so that we can uassert instead of invariant-ing. &lt;/p&gt;</description>
                <environment></environment>
        <key id="943866">SERVER-43698</key>
            <summary>Don&apos;t allow atClusterTime where number of seconds in Timestamp is 0</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="samy.lanka@mongodb.com">Samyukta Lanka</assignee>
                                    <reporter username="samy.lanka@mongodb.com">Samyukta Lanka</reporter>
                        <labels>
                    </labels>
                <created>Fri, 27 Sep 2019 21:22:05 +0000</created>
                <updated>Sun, 29 Oct 2023 22:16:42 +0000</updated>
                            <resolved>Fri, 18 Oct 2019 17:59:37 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2490290" author="xgen-internal-githook" created="Fri, 18 Oct 2019 17:58:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Samyukta Lanka&apos;, &apos;username&apos;: &apos;lankas&apos;, &apos;email&apos;: &apos;samy.lanka@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-43698&quot; title=&quot;Don&amp;#39;t allow atClusterTime where number of seconds in Timestamp is 0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-43698&quot;&gt;&lt;del&gt;SERVER-43698&lt;/del&gt;&lt;/a&gt; Don&apos;t allow atClusterTime whwere number of seconds in Timestamp is 0&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b9c13fa15b7e58add2c8618b77ca86431cf24408&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b9c13fa15b7e58add2c8618b77ca86431cf24408&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2483458" author="samy.lanka" created="Tue, 15 Oct 2019 18:39:09 +0000"  >&lt;p&gt;One thing to note: the reason why we don&apos;t need to make a similar change for &lt;tt&gt;afterClusterTime&lt;/tt&gt; is that there is a valid use case for specifying a timestamp with zero seconds. The &lt;tt&gt;OplogFetcher&lt;/tt&gt; uses it to query for the no holes point. &lt;/p&gt;</comment>
                            <comment id="2474004" author="jack.mulrow" created="Wed, 9 Oct 2019 15:41:20 +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;, mongos doesn&apos;t allow requests with atClusterTime at all (checked&#160;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/21d8699ed6c517b45e1613e20231cd8eba894985/src/mongo/s/commands/strategy.cpp#L409-L413&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;&#160;and tested &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3cb9e7903a/jstests/noPassthrough/readConcern_snapshot_mongos.js#L53-L62&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;), so I don&apos;t think we need to worry about that.&lt;/p&gt;</comment>
                            <comment id="2446943" author="kaloian.manassiev" created="Wed, 2 Oct 2019 11:03:39 +0000"  >&lt;p&gt;This should not cause any problem for sharding specifically, because we don&apos;t generate such null cluster times and as long as the operation times returned by replication on responses to writes are never null either, we should never be sending such invalid times to shards.&lt;/p&gt;

&lt;p&gt;That being said, I am not sure what happens if a customer sends atClusterTime request to MongoS with a null atClusterTime - I imagine this should be caught somewhere at the command level and not propagated to the storage engine, but it would be good if you guys can try it as part of this ticket?&lt;/p&gt;</comment>
                            <comment id="2443744" author="esha.maharishi@10gen.com" created="Tue, 1 Oct 2019 19:35:45 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=judah.schvimer&quot; class=&quot;user-hover&quot; rel=&quot;judah.schvimer&quot;&gt;judah.schvimer&lt;/a&gt;, I don&apos;t know of any reason why it would.&lt;/p&gt;

&lt;p&gt;CC &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;, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jack.mulrow&quot; class=&quot;user-hover&quot; rel=&quot;jack.mulrow&quot;&gt;jack.mulrow&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2437489" author="judah.schvimer" created="Fri, 27 Sep 2019 21:35:46 +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;, do you know if this will cause any problems for sharding?&lt;/p&gt;</comment>
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