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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-24058] Connection pool asio doesn&apos;t honor setup timeouts</title>
                <link>https://jira.mongodb.org/browse/SERVER-24058</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #EEEEEE;border-color: #ccc;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;border-bottom-color: #ccc;background-color: #6CB33F;&quot;&gt;&lt;b&gt;Issue Status as of Jun 03, 2016&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #EEEEEE;&quot;&gt;
&lt;p&gt;&lt;b&gt;ISSUE SUMMARY&lt;/b&gt;&lt;br/&gt;
The connection pool supports a timeout for setup, but the glue code that attaches it to asio doesn&apos;t actually honor this timeout. This means requests may hang forever behind connect. Even a series of requests repeat this workflow (because new connections aren&apos;t created in the pool because one is connecting forever).&lt;/p&gt;

&lt;p&gt;&lt;b&gt;USER IMPACT&lt;/b&gt;&lt;br/&gt;
This issue may cause symptoms that mimic a network partition. In particular, this issue is the most likely explanation if the hosts of two replica set members can successfully ping each other, but only one mongod is able is able to receive heartbeats. This error may be logged as &lt;/p&gt;

&lt;p/&gt;
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					&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;[ReplicationExecutor] Error in heartbeat request to xxxx:27000; ExceededTimeLimit: Couldn&apos;t get a connection within the time limit&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;b&gt;WORKAROUNDS&lt;/b&gt;&lt;br/&gt;
On the affected mongod execute to trigger a hostname caching refresh and re-resolved the hostname&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;&lt;b&gt;AFFECTED VERSIONS&lt;/b&gt;&lt;br/&gt;
MongoDB 3.2.0 through 3.2.6&lt;/p&gt;

&lt;p&gt;&lt;b&gt;FIX VERSION&lt;/b&gt;&lt;br/&gt;
The fix is included in the 3.2.7 production release.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h6&gt;&lt;a name=&quot;Originaldescription&quot;&gt;&lt;/a&gt;Original description&lt;/h6&gt;

&lt;p&gt;The connection pool supports a timeout for setup, but the glue code that attaches it to asio doesn&apos;t actually honor this timeout.  In practice, this means requests can hang forever behind connect.  Even a series of requests repeat this workflow (because new connections aren&apos;t created in the pool because one is connecting forever).&lt;/p&gt;</description>
                <environment></environment>
        <key id="284546">SERVER-24058</key>
            <summary>Connection pool asio doesn&apos;t honor setup timeouts</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="mira.carey@mongodb.com">Mira Carey</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                            <label>code-and-test</label>
                    </labels>
                <created>Wed, 4 May 2016 22:22:14 +0000</created>
                <updated>Mon, 8 Jan 2024 15:23:08 +0000</updated>
                            <resolved>Fri, 6 May 2016 17:48:59 +0000</resolved>
                                    <version>3.2.0</version>
                                    <fixVersion>3.2.7</fixVersion>
                    <fixVersion>3.3.6</fixVersion>
                                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>17</watches>
                                                                                                                <comments>
                            <comment id="1260842" author="xgen-internal-githook" created="Tue, 10 May 2016 15:44:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hanumantmk&apos;, u&apos;name&apos;: u&apos;Jason Carey&apos;, u&apos;email&apos;: u&apos;jcarey@argv.me&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24058&quot; title=&quot;Connection pool asio doesn&amp;#39;t honor setup timeouts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24058&quot;&gt;&lt;del&gt;SERVER-24058&lt;/del&gt;&lt;/a&gt; make connpool asio use setup timeouts&lt;/p&gt;

&lt;p&gt;We were ignoring passed setup timeouts, which caused connection acquisition to hang forever in&lt;br/&gt;
connect if the other side didn&apos;t accept or refuse a connection.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit ca2702ed79eb5f2fe5169495557a10d0b68fd0c0)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9afe9f3230eadb9d91a2866bf48023e074f76418&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9afe9f3230eadb9d91a2866bf48023e074f76418&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1257911" author="xgen-internal-githook" created="Fri, 6 May 2016 17:48:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hanumantmk&apos;, u&apos;name&apos;: u&apos;Jason Carey&apos;, u&apos;email&apos;: u&apos;jcarey@argv.me&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-24058&quot; title=&quot;Connection pool asio doesn&amp;#39;t honor setup timeouts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-24058&quot;&gt;&lt;del&gt;SERVER-24058&lt;/del&gt;&lt;/a&gt; make connpool asio use setup timeouts&lt;/p&gt;

&lt;p&gt;We were ignoring passed setup timeouts, which caused connection acquisition to hang forever in&lt;br/&gt;
connect if the other side didn&apos;t accept or refuse a connection.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ca2702ed79eb5f2fe5169495557a10d0b68fd0c0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ca2702ed79eb5f2fe5169495557a10d0b68fd0c0&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="295782">SERVER-24711</issuekey>
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            <issuekey id="277398">SERVER-23522</issuekey>
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