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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-9542] Incorrectly coded chunk/shard version comparison</title>
                <link>https://jira.mongodb.org/browse/SERVER-9542</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &quot;&amp;lt;=&quot; comparison operator for chunk/shard versions is incorrectly coded to execute a &quot;&amp;lt;&quot; comparison.&lt;/p&gt;

&lt;p&gt;Limited testing suggests minimal impact; adding a &quot;fatal assert&quot; on the missed case (where the values compared are equal) showed that a test for reload failed, leading to unnecessary reloads, but did not reveal other symptoms.&lt;/p&gt;

&lt;p&gt;For 2.5 and 2.4, the affected code is in src/mongo/s/chunk_version.h.&lt;br/&gt;
For 2.2, the affected code is in src/mongo/s/util.h.&lt;/p&gt;</description>
                <environment></environment>
        <key id="74003">SERVER-9542</key>
            <summary>Incorrectly coded chunk/shard version comparison</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="tad">Tad Marshall</assignee>
                                    <reporter username="tad">Tad Marshall</reporter>
                        <labels>
                    </labels>
                <created>Thu, 2 May 2013 18:33:15 +0000</created>
                <updated>Mon, 11 Jul 2016 17:38:16 +0000</updated>
                            <resolved>Thu, 2 May 2013 21:00:55 +0000</resolved>
                                    <version>2.2.0</version>
                                    <fixVersion>2.4.4</fixVersion>
                    <fixVersion>2.5.0</fixVersion>
                                    <component>Internal Code</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="334338" author="auto" created="Mon, 13 May 2013 11:36:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T18:34:02Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Change comparison operator to correct type&lt;/p&gt;

&lt;p&gt;Do not use &quot;&amp;lt;&quot; to execute a &quot;&amp;lt;=&quot; comparison.&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c9cc631ac964aafd5c951ae61e2eb09920be1d81&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c9cc631ac964aafd5c951ae61e2eb09920be1d81&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="334191" author="auto" created="Mon, 13 May 2013 05:24:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T20:41:30Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Fix incorrect unit test&lt;/p&gt;

&lt;p&gt;Unit test was passing due to the bug fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt;.  We&lt;br/&gt;
SHOULD get an error when trying to cloneMinus to the same version.&lt;br/&gt;
Changed the test to use a higher major version so that no error&lt;br/&gt;
message will be returned.&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/47c04a148e801116985394a4afb22c4b492ed0ee&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/47c04a148e801116985394a4afb22c4b492ed0ee&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="334190" author="auto" created="Mon, 13 May 2013 05:24:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T20:41:30Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Fix incorrect unit test&lt;/p&gt;

&lt;p&gt;Unit test was passing due to the bug fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt;.  We&lt;br/&gt;
SHOULD get an error when trying to cloneMinus to the same version.&lt;br/&gt;
Changed the test to use a higher major version so that no error&lt;br/&gt;
message will be returned.&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/47c04a148e801116985394a4afb22c4b492ed0ee&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/47c04a148e801116985394a4afb22c4b492ed0ee&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="326980" author="auto" created="Thu, 2 May 2013 20:52:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T20:41:30Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Fix incorrect unit test&lt;/p&gt;

&lt;p&gt;Unit test was passing due to the bug fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt;.  We&lt;br/&gt;
SHOULD get an error when trying to cloneMinus to the same version.&lt;br/&gt;
Changed the test to use a higher major version so that no error&lt;br/&gt;
message will be returned.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1930908cf3dc4ee2ca5db7b94625338af0cc6d13&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1930908cf3dc4ee2ca5db7b94625338af0cc6d13&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="326979" author="auto" created="Thu, 2 May 2013 20:52:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T20:41:30Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Fix incorrect unit test&lt;/p&gt;

&lt;p&gt;Unit test was passing due to the bug fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt;.  We&lt;br/&gt;
SHOULD get an error when trying to cloneMinus to the same version.&lt;br/&gt;
Changed the test to use a higher major version so that no error&lt;br/&gt;
message will be returned.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1930908cf3dc4ee2ca5db7b94625338af0cc6d13&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1930908cf3dc4ee2ca5db7b94625338af0cc6d13&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="326976" author="tad" created="Thu, 2 May 2013 20:49:41 +0000"  >&lt;p&gt;The code change showed that one of the unit tests was broken ... collection_manager_test.cpp.&lt;/p&gt;</comment>
                            <comment id="326884" author="auto" created="Thu, 2 May 2013 19:13:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2013-05-02T18:34:02Z&apos;, u&apos;name&apos;: u&apos;Tad Marshall&apos;, u&apos;email&apos;: u&apos;tad@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9542&quot; title=&quot;Incorrectly coded chunk/shard version comparison&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9542&quot;&gt;&lt;del&gt;SERVER-9542&lt;/del&gt;&lt;/a&gt; Change comparison operator to correct type&lt;/p&gt;

&lt;p&gt;Do not use &quot;&amp;lt;&quot; to execute a &quot;&amp;lt;=&quot; comparison.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/623683b0f717769626381f4d3fb6f62170ffd137&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/623683b0f717769626381f4d3fb6f62170ffd137&lt;/a&gt;&lt;/p&gt;</comment>
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