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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-31038] DBCollection.prototype.createIndexes can stall when given object with large &quot;length&quot; property</title>
                <link>https://jira.mongodb.org/browse/SERVER-31038</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When &lt;tt&gt;createIndexes&lt;/tt&gt; is called, it immediately does a loop over &lt;tt&gt;keys.length&lt;/tt&gt;. If instead of passing in an array for &lt;tt&gt;keys&lt;/tt&gt;, we pass an object with a field called &lt;tt&gt;length&lt;/tt&gt; that has a large value, the shell will stall in the loop. This causes some issues in the jstestfuzzer.&lt;/p&gt;

&lt;p&gt;I think the easiest solution would be to just check whether &lt;tt&gt;keys&lt;/tt&gt; is actually an array at the beginning of the function, and if not, to return or throw an error without entering the loop.&lt;/p&gt;


&lt;p&gt;This problem is similar to the bug reported here a few years back:&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19474&quot; title=&quot;Calling createIndex() can cause the shell to stall&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19474&quot;&gt;&lt;del&gt;SERVER-19474&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="426252">SERVER-31038</key>
            <summary>DBCollection.prototype.createIndexes can stall when given object with large &quot;length&quot; property</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="13201">Fixed</resolution>
                                        <assignee username="ian.boros@mongodb.com">Ian Boros</assignee>
                                    <reporter username="ian.boros@mongodb.com">Ian Boros</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Sep 2017 19:50:51 +0000</created>
                <updated>Mon, 8 Jan 2024 15:23:03 +0000</updated>
                            <resolved>Tue, 19 Sep 2017 19:53:50 +0000</resolved>
                                                    <fixVersion>3.6.0-rc0</fixVersion>
                                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1676935" author="xgen-internal-githook" created="Tue, 19 Sep 2017 19:51:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ian Boros&apos;, &apos;email&apos;: &apos;ian.boros@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31038&quot; title=&quot;DBCollection.prototype.createIndexes can stall when given object with large &amp;quot;length&amp;quot; property&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31038&quot;&gt;&lt;del&gt;SERVER-31038&lt;/del&gt;&lt;/a&gt; Fix possible stall from happening in DBCollection.createIndexes&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/614cbd5a16c483df81f421f94fcdfdd995f8cc71&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/614cbd5a16c483df81f421f94fcdfdd995f8cc71&lt;/a&gt;&lt;/p&gt;</comment>
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                <issuelinks>
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                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="217391">SERVER-19474</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="223478">SERVER-19672</issuekey>
        </issuelink>
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                        <customfieldname>Steps To Reproduce</customfieldname>
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                            <customfieldvalue>&lt;p&gt;Run the following in the shell:&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;   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;db.foo.createIndexes({&lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;length&quot;&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: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1000000&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;/pre&gt;
			&lt;/td&gt;
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