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    <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>[JAVA-612] DBRef hashCode is broken</title>
                <link>https://jira.mongodb.org/browse/JAVA-612</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;DBRef (through DBRefBase) defines an equals() method but no hashCode()   &lt;br/&gt;
Two equal objects are hashed using Object hashCode() with different hashes.&lt;br/&gt;
add, remove, contains etc. don&apos;t work properly for hash based collections.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="45839">JAVA-612</key>
            <summary>DBRef hashCode is broken</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="9">Done</resolution>
                                        <assignee username="jeff.yemin@mongodb.com">Jeffrey Yemin</assignee>
                                    <reporter username="orid">Ori Dar</reporter>
                        <labels>
                    </labels>
                <created>Tue, 31 Jul 2012 07:40:49 +0000</created>
                <updated>Wed, 29 Aug 2012 20:08:03 +0000</updated>
                            <resolved>Tue, 31 Jul 2012 12:24:06 +0000</resolved>
                                    <version>2.7.3</version>
                                    <fixVersion>2.9.0</fixVersion>
                                    <component>API</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="158201" author="jeff.yemin" created="Wed, 29 Aug 2012 20:08:03 +0000"  >&lt;p&gt;Closing as part of 2.9.0 release process.&lt;/p&gt;</comment>
                            <comment id="149005" author="jeff.yemin" created="Tue, 31 Jul 2012 12:24:06 +0000"  >&lt;p&gt;Also changed DBRefBase#equals so that it does not accept sub-classes.  Subclasses that need additional fields includes should override equals/hashCode.&lt;/p&gt;</comment>
                            <comment id="149004" author="auto" created="Tue, 31 Jul 2012 12:20:35 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-07-31T05:20:15-07:00&apos;, u&apos;email&apos;: u&apos;jeff.yemin@10gen.com&apos;, u&apos;name&apos;: u&apos;Jeff Yemin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-612&quot; title=&quot;DBRef hashCode is broken&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-612&quot;&gt;&lt;del&gt;JAVA-612&lt;/del&gt;&lt;/a&gt;: Properly define equals and hashCode for DBRefBase&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/commit/761f694ee3a096214c68cfe88dbe7e54d2efc335&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/commit/761f694ee3a096214c68cfe88dbe7e54d2efc335&lt;/a&gt;&lt;/p&gt;</comment>
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