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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>
    </build-info>


<item>
            <title>[SERVER-36637] IDL objects should hold owned BSONObjs</title>
                <link>https://jira.mongodb.org/browse/SERVER-36637</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When parsing &lt;tt&gt;BSONType::Object&lt;/tt&gt; elements, the automatically-generated parse method will store a view of BSON in the spec, rather than an owned copy. For example,&lt;/p&gt;
&lt;p/&gt;
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				&lt;p style=&quot;margin: 5px 10px; padding: 0;&quot;&gt;document_source_out_gen.cpp&lt;/p&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;121&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;else&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;if&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; (fieldName == kUniqueKeyFieldName) {&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;122&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;if&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; (MONGO_unlikely(usedFields[kUniqueKeyBit])) {&lt;/span&gt;&lt;/pre&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;123&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                ctxt.throwDuplicateField(element);&lt;/span&gt;&lt;/pre&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;124&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            }&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;125&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;126&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            usedFields.set(kUniqueKeyBit);&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;127&lt;/span&gt;&lt;/pre&gt;
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							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;128&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            &lt;/span&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;if&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; (MONGO_likely(ctxt.checkAndAssertType(element, Object))) {&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#6ce26c&quot;  style=&quot; background-color: #6ce26c !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: white;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;129&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#e0e0e0&quot;  style=&quot; background-color: #e0e0e0 !important; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                _uniqueKey = element.Obj();&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;130&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            }&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  bgcolor=&quot;#f5f5f5&quot;  style=&quot; background-color: #f5f5f5 !important;  line-height: 1.4em !important; border-right: 1px solid #bbb; text-align: right; width: 2em; margin: 0em; vertical-align: top;&quot;&gt;
							&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot; color: #707070;  font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;131&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        }&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;The spec then contains garbage if the original object used for parsing goes out-of-scope. Since the IDL already holds other owned types (e.g. &lt;tt&gt;std::string&lt;/tt&gt;), we should strive to keep an owned copy of BSON.&lt;/p&gt;

&lt;p&gt;I don&apos;t think this affects existing users of the IDL, as in most usages the original command object is kept around for the lifetime of the command&apos;s execution. However, we&apos;d like to serialize $out with the IDL in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36187&quot; title=&quot;Use the IDL to serialize $out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36187&quot;&gt;&lt;del&gt;SERVER-36187&lt;/del&gt;&lt;/a&gt;, but our reparse-reserialization tests hit a segmentation violation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="588284">SERVER-36637</key>
            <summary>IDL objects should hold owned BSONObjs</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="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="kyle.suarez@mongodb.com">Kyle Suarez</reporter>
                        <labels>
                    </labels>
                <created>Tue, 14 Aug 2018 16:33:47 +0000</created>
                <updated>Sun, 29 Oct 2023 22:28:59 +0000</updated>
                            <resolved>Fri, 14 Sep 2018 17:30:19 +0000</resolved>
                                                    <fixVersion>4.1.4</fixVersion>
                                    <component>IDL</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2003601" author="mark.benvenuto" created="Fri, 14 Sep 2018 19:36:46 +0000"  >&lt;p&gt;Actually I tried to make the change but it broke the build.&lt;/p&gt;

&lt;p&gt;Repl depends on the current behavior - &lt;a href=&quot;https://github.com/mongodb/mongo/blob/082ece16ab827e4fbbc714a7bfafd5135e2bbf05/src/mongo/db/repl/rs_rollback.cpp#L571&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/082ece16ab827e4fbbc714a7bfafd5135e2bbf05/src/mongo/db/repl/rs_rollback.cpp#L571&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I will leave it as is rather then causing unnecessary copies in repl.&lt;/p&gt;</comment>
                            <comment id="2003560" author="xgen-internal-githook" created="Fri, 14 Sep 2018 19:10:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36637&quot; title=&quot;IDL objects should hold owned BSONObjs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36637&quot;&gt;&lt;del&gt;SERVER-36637&lt;/del&gt;&lt;/a&gt; IDL objects should hold owned BSONObjs&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 846a6c19839601ce66f27877b348a4a5150a453d.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6f0a463deaf890219b4b08172ebaef28df81b470&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6f0a463deaf890219b4b08172ebaef28df81b470&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2003393" author="xgen-internal-githook" created="Fri, 14 Sep 2018 17:29:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mark Benvenuto&apos;, &apos;email&apos;: &apos;mark.benvenuto@mongodb.com&apos;, &apos;username&apos;: &apos;markbenvenuto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36637&quot; title=&quot;IDL objects should hold owned BSONObjs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36637&quot;&gt;&lt;del&gt;SERVER-36637&lt;/del&gt;&lt;/a&gt; IDL objects should hold owned BSONObjs&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/846a6c19839601ce66f27877b348a4a5150a453d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/846a6c19839601ce66f27877b348a4a5150a453d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1980531" author="kyle.suarez" created="Mon, 20 Aug 2018 19:17:15 +0000"  >&lt;p&gt;For the sake of completeness, $mergeCursors works around this by &lt;a href=&quot;https://github.com/mongodb/mongo/blob/168c8d65556ab18b05e33b5f4006d1184c30f8f7/src/mongo/db/pipeline/document_source_merge_cursors.h#L102-L104&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;keeping the original BSONObj in scope&lt;/a&gt; for the lifetime of its execution. That&apos;s an alternative approach we could take if we didn&apos;t want to change the behavior of the IDL.&lt;/p&gt;</comment>
                            <comment id="1975579" author="kyle.suarez" created="Tue, 14 Aug 2018 17:11:44 +0000"  >&lt;p&gt;Okay, after a brief attempt at this, I don&apos;t think it&apos;s worth the effort of me trying to finish this. At the moment, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36187&quot; title=&quot;Use the IDL to serialize $out&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36187&quot;&gt;&lt;del&gt;SERVER-36187&lt;/del&gt;&lt;/a&gt; is not on the critical path for the $out project, so I&apos;m dropping this into the Platforms Team needs triage queue to focus on required pieces of the $out project.&lt;/p&gt;</comment>
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