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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-28253] MongoDB server configuration does not supersede client driver config</title>
                <link>https://jira.mongodb.org/browse/SERVER-28253</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;mongo clients can override some parameters (e.g &quot;no cursor timeout&quot;) resulting in uncontrollable outcomes.&lt;/p&gt;

&lt;p&gt;Example : &lt;br/&gt;
DB perf. can be impacted if the number of opened cursors reaches 4k, this is caused by setting &quot;no cursor timeout&quot; on the client side, unfortunately the later override current value in DB servers&lt;/p&gt;

&lt;p&gt;Due to mongo limitations we cannot prevent a client (via a driver) to override the current server setting (including open/close explicit cursors), the alternative we have adopted for now is to alert &amp;amp; detect:&lt;/p&gt;

&lt;p&gt;1- Setup an alert for all parameters susceptible of causing perf. issues in DB&lt;br/&gt;
Note: Alert(s) thresholds have been revised and values have been lowered in order to have enough room for action | e.g cursor threshold is 50&lt;/p&gt;

&lt;p&gt;2- Isolate offending clients by providing IP address and checking for any driver config update (DBA &amp;gt; through logs and/or mongo shell commands)&lt;/p&gt;

&lt;p&gt;The option cited above (#1 &amp;amp; #2) is just a temporary measure as we would like to see more flexibility from the DB and back end side.&lt;/p&gt;</description>
                <environment>mongodb 3.x</environment>
        <key id="362657">SERVER-28253</key>
            <summary>MongoDB server configuration does not supersede client driver config</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="asahraoui@elance.com">Amine Sahraoui</reporter>
                        <labels>
                            <label>re-triaged-ticket</label>
                    </labels>
                <created>Wed, 8 Mar 2017 22:59:44 +0000</created>
                <updated>Thu, 23 Feb 2023 21:59:59 +0000</updated>
                            <resolved>Thu, 24 Feb 2022 21:56:29 +0000</resolved>
                                                                    <component>Admin</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4375713" author="JIRAUSER1262719" created="Thu, 24 Feb 2022 21:56:29 +0000"  >&lt;p&gt;We haven&#8217;t heard back from you for at least one calendar year, so this issue is being closed. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;</comment>
                            <comment id="1519520" author="behackett" created="Wed, 8 Mar 2017 23:08:05 +0000"  >&lt;p&gt;Hi.&lt;/p&gt;

&lt;p&gt;I&apos;ve moved this ticket to the SERVER project because I believe you are requesting a change to MongoDB rather than the drivers.&lt;/p&gt;</comment>
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