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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[CDRIVER-2155] Bug in unreleased code: Client pool cannot connect with IPv6 address like &quot;[::1]&quot;</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-2155</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;Bug in unreleased code, &lt;a href=&quot;https://github.com/ajdavis/mongo-c-driver/commit/242e585de1d0fd142fc2222a98b2deb2f592bc1b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;introduced on master during 1.7 development&lt;/a&gt;. This bug does not affect released versions.&lt;/p&gt;

&lt;p&gt;The driver correctly strips the &quot;[&quot; and &quot;]&quot; characters from the host in a URI like &quot;mongodb://[::1]&quot; before calling getaddrinfo on the host in mongoc_topology_scanner_node_connect_tcp(). In single-client mode, that is the only getaddrinfo call; the connection established by the topology scanner is also used for application operations.&lt;/p&gt;

&lt;p&gt;In pooled mode, however, there is a second path for establishing connections for application operations, in mongoc_client_connect_tcp. This second path does &lt;b&gt;not&lt;/b&gt; strip &quot;[&quot; and &quot;]&quot; from the hostname, and so it calls getaddrinfo on a misformatted string like &quot;[::1]&quot; instead of the intended &quot;::1&quot;.&lt;/p&gt;

&lt;p&gt;Connecting to &quot;mongodb://[::1]&quot; in pooled mode fails, therefore, with an error like &quot;Failed to resolve [::1]&quot;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="382220">CDRIVER-2155</key>
            <summary>Bug in unreleased code: Client pool cannot connect with IPv6 address like &quot;[::1]&quot;</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="jesse@mongodb.com">A. Jesse Jiryu Davis</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Tue, 9 May 2017 15:01:20 +0000</created>
                <updated>Sat, 28 Oct 2023 11:30:41 +0000</updated>
                            <resolved>Tue, 16 May 2017 02:20:02 +0000</resolved>
                                                    <fixVersion>1.7.0</fixVersion>
                                    <component>libmongoc</component>
                    <component>network</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1571863" author="xgen-internal-githook" created="Tue, 16 May 2017 02:19:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;ajdavis&apos;, u&apos;name&apos;: u&apos;A. Jesse Jiryu Davis&apos;, u&apos;email&apos;: u&apos;jesse@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2155&quot; title=&quot;Bug in unreleased code: Client pool cannot connect with IPv6 address like &amp;quot;[::1]&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2155&quot;&gt;&lt;del&gt;CDRIVER-2155&lt;/del&gt;&lt;/a&gt; fix IPv6 parsing in pooled mode&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/d1f6383ee83e0c7d97978b26fc192d8adadf4d0a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/d1f6383ee83e0c7d97978b26fc192d8adadf4d0a&lt;/a&gt;&lt;/p&gt;</comment>
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