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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-41891] $group on sorted cursor forces full collection scan</title>
                <link>https://jira.mongodb.org/browse/SERVER-41891</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;mongodb-osx-x86_64-4.0.6&lt;/p&gt;

&lt;p&gt;I have a collection with ~2 million documents. Each document is uniquely identified by a &apos;date&apos; field (business date, not upload date). I implemented a historicization system by storing multiple documents with the same &apos;date&apos; field and, within the same date, picking up the one with the highest _id (which is always auto-generated on insert).&lt;/p&gt;

&lt;p&gt;Collection unique index:&#160;&lt;tt&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;(date, -1), (_id, -1)&amp;#93;&lt;/span&gt;&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;A typical aggregation pipeline where I fetch the latest version of any number of documents:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;  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;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$match&quot;: { &quot;date&quot;: DATE_MATCH},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     {&quot;$sort&quot;: SON( [ (&quot;date&quot;, -1), (&quot;_id&quot;, -1), ] ) },&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$group&quot;: {&quot;_id&quot;: { &quot;date&quot;: &quot;$date&quot;}, &quot;doc&quot;: {&quot;$first&quot;: &quot;$$ROOT&quot;}}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$replaceRoot&quot;: {&quot;newRoot&quot;: &quot;$doc&quot;}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;   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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;The above works very well - as long only a handful of documents are filtered in by the initial $match step.&lt;/p&gt;

&lt;p&gt;But then the query becomes &quot;&lt;em&gt;get the latest version (max id) of the newest 5 documents (max 5 dates)&quot; older than DATE_MAX&lt;/em&gt;, without any constraints on the minimum date:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;  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;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$match&quot;: { &quot;date&quot;: {&quot;$lt&quot;: DATE_MAX}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$sort&quot;: SON( [ (&quot;date&quot;, -1), (&quot;_id&quot;, -1), ] ) },&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     {&quot;$group&quot;: {&quot;_id&quot;: { &quot;date&quot;: &quot;$date&quot;}, &quot;doc&quot;: {&quot;$first&quot;: &quot;$$ROOT&quot;}}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$replaceRoot&quot;: {&quot;newRoot&quot;: &quot;$doc&quot;}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$sort&quot;: SON( [ (&quot;date&quot;, -1)] },&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     {&quot;$limit&quot;: 5},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;   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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;The above functionally does the job, but it is &lt;b&gt;100x slower&lt;/b&gt;&#160;than just&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;  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;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$match&quot;: { &quot;date&quot;: {&quot;$lt&quot;: DATE_MAX}},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;     {&quot;$sort&quot;: SON( [ (&quot;date&quot;, -1), (&quot;_id&quot;, -1), ] ) },&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     {&quot;$limit&quot;: 5},&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&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;   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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;which however produces incorrect results as it will return multiple versions of the same document.&lt;/p&gt;


&lt;p&gt;The problem is that after $match I have thousands, if not millions, of documents potentially returned by the cursor - literally everything from the 1980s onwards, which I &lt;em&gt;do&lt;/em&gt; want to pick up if there isn&apos;t anything newer available.&lt;/p&gt;

&lt;p&gt;One would assume that, just like $sort, $group automatically notices that the results are already sorted exactly like it needs them to, therefore grouping the results as they arrive and releasing RAM as soon as the aggregation key changes. This would mean that as soon as 5 unique dates reach the $limit step, the whole pipeline can be cancelled.&lt;/p&gt;

&lt;p&gt;That is not the case - the timings clearly show that $group is doing a full scan of the whole collection. Note the second $sort; that is necessary because $group is returning dates sorted in &lt;b&gt;ascending&lt;/b&gt; order, even if the $sort step before it yields them in &lt;b&gt;descending&lt;/b&gt;&#160;order.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="812351">SERVER-41891</key>
            <summary>$group on sorted cursor forces full collection scan</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="3">Duplicate</resolution>
                                        <assignee username="eric.sedor@mongodb.com">Eric Sedor</assignee>
                                    <reporter username="gimperiale">Guido Imperiale</reporter>
                        <labels>
                    </labels>
                <created>Mon, 24 Jun 2019 17:26:00 +0000</created>
                <updated>Wed, 22 Sep 2021 16:24:53 +0000</updated>
                            <resolved>Fri, 28 Jun 2019 20:32:25 +0000</resolved>
                                    <version>4.0.6</version>
                                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2305385" author="eric.sedor" created="Fri, 28 Jun 2019 20:32:25 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gimperiale&quot; class=&quot;user-hover&quot; rel=&quot;gimperiale&quot;&gt;gimperiale&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24799&quot; title=&quot;$group aggregation command should maintain document order&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24799&quot;&gt;&lt;del&gt;SERVER-24799&lt;/del&gt;&lt;/a&gt; covers a previous request for $group to respect input order. It is something we have decided not to do. So, I am closing this as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4507&quot; title=&quot;aggregation:  optimize $group to take advantage of sorted sequences&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4507&quot;&gt;SERVER-4507&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2296714" author="eric.sedor" created="Tue, 25 Jun 2019 15:32:59 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gimperiale&quot; class=&quot;user-hover&quot; rel=&quot;gimperiale&quot;&gt;gimperiale&lt;/a&gt;--I am going to investigate this point more before deciding to close this ticket as a duplicate:&lt;/p&gt;

&lt;p&gt;&quot;$group is returning dates sorted in ascending order, even if the $sort step before it yields them in descending order.&quot;&lt;/p&gt;

&lt;p&gt;Thanks in advance for your patience.&lt;/p&gt;</comment>
                            <comment id="2296708" author="gimperiale" created="Tue, 25 Jun 2019 15:30:05 +0000"  >&lt;p&gt;Hi,&lt;br/&gt;
Yes, you are correct on both points&lt;/p&gt;</comment>
                            <comment id="2296416" author="eric.sedor" created="Tue, 25 Jun 2019 13:29:22 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=gimperiale&quot; class=&quot;user-hover&quot; rel=&quot;gimperiale&quot;&gt;gimperiale&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;The potential for optimizing $group for sorted input is tracked in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-4507&quot; title=&quot;aggregation:  optimize $group to take advantage of sorted sequences&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-4507&quot;&gt;SERVER-4507&lt;/a&gt;. I encourage you to watch that ticket for updates. You can also chime in on that ticket to describe your use-case and the importance of the improvement for your system.&lt;/p&gt;

&lt;p&gt;Before closing this ticket though, I wanted to better understand your unique index on &quot;&lt;span class=&quot;error&quot;&gt;&amp;#91;(date, -1), (id_, -1)&amp;#93;&lt;/span&gt;&quot;:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;I just want to verify my assumption that you meant _id, to be sure. If I am assuming incorrectly then I may have additional guidance to provide.&lt;/li&gt;
	&lt;li&gt;Do I understand correctly that the uniqueness criteria on both date and _id so that the collection can support historic documents in which the same business dates were stored in separate documents?&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="2296191" author="gimperiale" created="Tue, 25 Jun 2019 08:29:23 +0000"  >&lt;p&gt;To clarify: when I wrote&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;&#160;$group is doing a full scan of the whole collection&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;what I more precisely meant is that $group is ingesting all documents from the previous stage of the pipeline before it emits a single one.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="26715">SERVER-4507</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="296637">SERVER-24799</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
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