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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-50103] DBClientCursor doesn&apos;t set a socket timeout when using a side connection to send the kill cursor request</title>
                <link>https://jira.mongodb.org/browse/SERVER-50103</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When closing an exhaust cursor currently in use, we have this logic in &lt;tt&gt;DBClientCursor&lt;/tt&gt; to use a side connection to &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r4.4.0/src/mongo/client/dbclient_cursor.cpp#L614-L617&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;send a best-effort kill cursor request&lt;/a&gt;. In the implementation of &lt;tt&gt;DBClientBase::withConnection_do_not_use&lt;/tt&gt;, we use a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r4.4.0/src/mongo/client/connpool.cpp#L738&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;ScopedDbConnection&lt;/tt&gt; without a socket timeout&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1429771">SERVER-50103</key>
            <summary>DBClientCursor doesn&apos;t set a socket timeout when using a side connection to send the kill cursor request</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="13201">Fixed</resolution>
                                        <assignee username="samy.lanka@mongodb.com">Samyukta Lanka</assignee>
                                    <reporter username="lingzhi.deng@mongodb.com">Lingzhi Deng</reporter>
                        <labels>
                    </labels>
                <created>Tue, 4 Aug 2020 19:53:36 +0000</created>
                <updated>Sun, 29 Oct 2023 22:04:49 +0000</updated>
                            <resolved>Fri, 9 Oct 2020 13:46:45 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                    <fixVersion>4.4.2</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3460332" author="xgen-internal-githook" created="Thu, 22 Oct 2020 21:20:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Samy Lanka&apos;, &apos;email&apos;: &apos;samy.lanka@mongodb.com&apos;, &apos;username&apos;: &apos;lankas&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50103&quot; title=&quot;DBClientCursor doesn&amp;#39;t set a socket timeout when using a side connection to send the kill cursor request&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50103&quot;&gt;&lt;del&gt;SERVER-50103&lt;/del&gt;&lt;/a&gt; Don&apos;t send killCursor request for exhaust cursors in DBClientCursor&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a5ab1eda7d43aee1f944bb2f1e3734924aa5566c)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4af92e06310df55fb7744556dbf2447d90fa2238&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4af92e06310df55fb7744556dbf2447d90fa2238&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3436841" author="xgen-internal-githook" created="Fri, 9 Oct 2020 13:44:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Samy Lanka&apos;, &apos;email&apos;: &apos;samy.lanka@mongodb.com&apos;, &apos;username&apos;: &apos;lankas&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50103&quot; title=&quot;DBClientCursor doesn&amp;#39;t set a socket timeout when using a side connection to send the kill cursor request&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50103&quot;&gt;&lt;del&gt;SERVER-50103&lt;/del&gt;&lt;/a&gt; Don&apos;t send killCursor request for exhaust cursors in DBClientCursor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a5ab1eda7d43aee1f944bb2f1e3734924aa5566c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a5ab1eda7d43aee1f944bb2f1e3734924aa5566c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3322814" author="lingzhi.deng" created="Wed, 5 Aug 2020 15:07:09 +0000"  >&lt;p&gt;Yes, as I mentioned in the HELP ticket, I think after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44700&quot; title=&quot;Use markKillOnClientDisconnect to interrupt a running synthetic getMore if the client disconnects&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44700&quot;&gt;&lt;del&gt;SERVER-44700&lt;/del&gt;&lt;/a&gt; we dont need to send killCursor. I should have changed the title. (I think I was thinking the title should reflect the bug. But I agree with the solution)&lt;/p&gt;</comment>
                            <comment id="3322807" author="jason.carey" created="Wed, 5 Aug 2020 15:04:58 +0000"  >&lt;p&gt;I wonder if it&apos;s actually necessary to send the killCursor after &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44700&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-44700&lt;/a&gt;.  It seems to me that, at least on 4.4 and later, that we should be able to clean up the server side work entirely by disconnecting from the client side (rather than by sending this disconnect with a socket timeout)&lt;/p&gt;

&lt;p&gt;Would you be looking to still send the killCursor because we&apos;re hesitant to backport that change?&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
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