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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-45456] Allow JavaScript on mongos </title>
                <link>https://jira.mongodb.org/browse/SERVER-45456</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When the mergerPart of an aggregation contains Javascript, we need to pick a shard to do the merge, because mongos doesn&apos;t support Javascript today. On allowing Javascript execution on mongos, we can instead keep the merge local. This will be useful for reducing latency (one fewer hop), and for reducing the load on the shards (by moving the work to mongos).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1082954">SERVER-45456</key>
            <summary>Allow JavaScript on mongos </summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                            <label>qopt-team</label>
                    </labels>
                <created>Thu, 9 Jan 2020 20:46:50 +0000</created>
                <updated>Sun, 29 Oct 2023 22:13:30 +0000</updated>
                            <resolved>Fri, 7 Feb 2020 14:09:34 +0000</resolved>
                                                    <fixVersion>4.3.4</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2836872" author="xgen-internal-githook" created="Fri, 7 Feb 2020 14:07:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;jameswahlin&apos;, &apos;name&apos;: &apos;James Wahlin&apos;, &apos;email&apos;: &apos;james@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-45456&quot; title=&quot;Allow JavaScript on mongos &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-45456&quot;&gt;&lt;del&gt;SERVER-45456&lt;/del&gt;&lt;/a&gt; Allow JavaScript on mongos&lt;/p&gt;

&lt;p&gt; create mode 100644 jstests/noPassthrough/mr_noscripting.js&lt;br/&gt;
 delete mode 100644 jstests/noPassthroughWithMongod/mr_noscripting.js&lt;br/&gt;
 create mode 100644 jstests/sharding/agg_js_on_mongos.js&lt;br/&gt;
 create mode 100644 jstests/sharding/javascript_heap_limit.js&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0f36fdce71df08aa7c0703bda69a7045f96f41c8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0f36fdce71df08aa7c0703bda69a7045f96f41c8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2732197" author="james.wahlin@10gen.com" created="Wed, 15 Jan 2020 17:43:33 +0000"  >&lt;p&gt;As part of allowing JavaScript on mongos, we will reduce the max Javascript heap size default to 100MB, as mongos processes are often run on machines with fewer resources than cluster shards. This setting will be configurable.&lt;/p&gt;

&lt;p&gt;Additionally mongos will allow Javascript to be disabled via configuration file or command line parameter, as is the case currently for mongod.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="1082907">SERVER-45455</issuekey>
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                                        <issuelink>
            <issuekey id="1128522">DOCS-13387</issuekey>
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            <issuekey id="884540">SERVER-42637</issuekey>
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                            <customfieldvalue>Flagging the Cloud and Drivers teams as this ticket will allow users to run JavaScript on mongos.&lt;br/&gt;
&lt;br/&gt;
JavaScript can be disabled if needed on mongos via the same manner as is currently done on mongod:&lt;br/&gt;
- Via \-\-noscripting command line argument&lt;br/&gt;
- Setting &amp;#39;security.javascriptEnabled&amp;#39; to false in the mongos config file</customfieldvalue>

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