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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-10795] Interrupting Javascript during V8Scope initialization causes resource leak</title>
                <link>https://jira.mongodb.org/browse/SERVER-10795</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The V8Scope constructor is not exception-safe, and will leak V8 isolates if an exception is thrown.  Thus, if a user executes a Javascript operation that acquires a new scope, and then interrupts that operation while its initialization files are being executed (assert.js, types.js), the half-constructed V8Scope object will be leaked.  The initialization files can take on the order of ~100 milliseconds to run.&lt;/p&gt;

&lt;p&gt;Reproduce in master with:&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;for (;;) { db.runCommand({eval: function(){}, maxTimeMS: 1}); }&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;On my local machine, the above leaks 2GB in ~30 seconds.  The same occurs in 2.4.6 using killOp instead of maxTimeMS.  No V8Scope is ever successfully constructed, and the scope pool remains empty.&lt;/p&gt;</description>
                <environment></environment>
        <key id="90194">SERVER-10795</key>
            <summary>Interrupting Javascript during V8Scope initialization causes resource leak</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="rassi">J Rassi</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Tue, 17 Sep 2013 03:57:36 +0000</created>
                <updated>Mon, 11 Jul 2016 17:37:32 +0000</updated>
                            <resolved>Mon, 7 Oct 2013 21:24:19 +0000</resolved>
                                    <version>2.4.6</version>
                    <version>2.5.2</version>
                                    <fixVersion>2.5.3</fixVersion>
                                    <component>JavaScript</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="436858" author="auto" created="Mon, 7 Oct 2013 21:19:26 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10795&quot; title=&quot;Interrupting Javascript during V8Scope initialization causes resource leak&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10795&quot;&gt;&lt;del&gt;SERVER-10795&lt;/del&gt;&lt;/a&gt; clean up V8Scope if exception thrown in constructor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/af5bab59517363df5c9bfe307525676073677756&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/af5bab59517363df5c9bfe307525676073677756&lt;/a&gt;&lt;/p&gt;</comment>
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