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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-40156] Initial implementation of Split Horizon</title>
                <link>https://jira.mongodb.org/browse/SERVER-40156</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Refine and land the PoC that was used to answer questions during the design phase.&lt;/p&gt;</description>
                <environment></environment>
        <key id="717370">SERVER-40156</key>
            <summary>Initial implementation of Split Horizon</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="13201">Fixed</resolution>
                                        <assignee username="adam.martin@mongodb.com">ADAM Martin</assignee>
                                    <reporter username="adam.martin@mongodb.com">ADAM Martin</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 Mar 2019 15:09:13 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:56 +0000</updated>
                            <resolved>Fri, 17 May 2019 19:46:55 +0000</resolved>
                                                    <fixVersion>3.6.14</fixVersion>
                    <fixVersion>4.1.12</fixVersion>
                    <fixVersion>4.0.11</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2276370" author="xgen-internal-githook" created="Fri, 7 Jun 2019 19:14:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;ADAM David Alan Martin&apos;, &apos;email&apos;: &apos;adam.martin@10gen.com&apos;, &apos;username&apos;: &apos;adamlsd&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40156&quot; title=&quot;Initial implementation of Split Horizon&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40156&quot;&gt;&lt;del&gt;SERVER-40156&lt;/del&gt;&lt;/a&gt; Replica sets support Split Horizons&lt;/p&gt;

&lt;p&gt;Replica sets can now respond to `isMaster` requests with&lt;br/&gt;
different hostnames and ports, if contacted via alternate&lt;br/&gt;
names using TLS.  The `horizons` field in replica set&lt;br/&gt;
member configurations can be used to control which&lt;br/&gt;
`HostAndPort` to reply with for which &quot;horizon view&quot; of&lt;br/&gt;
a replica set.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 6d6d54c9d638dad00f51a6640a696554c0e8675b)&lt;/p&gt;

&lt;p&gt; Conflicts:&lt;br/&gt;
    src/mongo/db/auth/authorization_manager_test.cpp&lt;br/&gt;
    src/mongo/db/repl/SConscript&lt;br/&gt;
    src/mongo/db/repl/replication_info.cpp&lt;br/&gt;
    src/mongo/db/repl/topology_coordinator.h&lt;br/&gt;
    src/mongo/embedded/replication_coordinator_embedded.cpp&lt;br/&gt;
    src/mongo/embedded/replication_coordinator_embedded.h&lt;br/&gt;
    src/mongo/logger/max_log_size.cpp&lt;br/&gt;
    src/mongo/transport/session_asio.h&lt;br/&gt;
    src/mongo/util/net/ssl_manager.h&lt;br/&gt;
    src/mongo/util/net/ssl_manager_apple.cpp&lt;br/&gt;
    src/mongo/util/net/ssl_manager_openssl.cpp&lt;br/&gt;
    src/mongo/util/net/ssl_manager_windows.cpp&lt;/p&gt;

&lt;p&gt;`src/mongo/util/net/ssl_manager.cpp` was modified to make this change&lt;br/&gt;
work in the older SSL stack of v3.6.&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fea9933ab0d28638e97304c395f2eaf7ba63881c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fea9933ab0d28638e97304c395f2eaf7ba63881c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2264371" author="xgen-internal-githook" created="Wed, 29 May 2019 20:37:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;adam.martin@10gen.com&apos;, &apos;name&apos;: &apos;ADAM David Alan Martin&apos;, &apos;username&apos;: &apos;adamlsd&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40156&quot; title=&quot;Initial implementation of Split Horizon&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40156&quot;&gt;&lt;del&gt;SERVER-40156&lt;/del&gt;&lt;/a&gt; Replica sets support Split Horizons&lt;/p&gt;

&lt;p&gt;Replica sets can now respond to `isMaster` requests with&lt;br/&gt;
different hostnames and ports, if contacted via alternate&lt;br/&gt;
names using TLS.  The `horizons` field in replica set&lt;br/&gt;
member configurations can be used to control which&lt;br/&gt;
`HostAndPort` to reply with for which &quot;horizon view&quot; of&lt;br/&gt;
a replica set.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 6784f6568cc45fe25510e2d2393be57daffb5411)&lt;/p&gt;

&lt;p&gt; Conflicts:&lt;br/&gt;
	src/mongo/db/client.h&lt;br/&gt;
	src/mongo/db/repl/SConscript&lt;br/&gt;
	src/mongo/db/repl/replication_coordinator_impl_test.cpp&lt;br/&gt;
	src/mongo/db/repl/replication_info.cpp&lt;br/&gt;
	src/mongo/db/repl/topology_coordinator.h&lt;br/&gt;
	src/mongo/transport/session_asio.h&lt;br/&gt;
	src/mongo/util/net/ssl_manager_openssl.cpp&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6d6d54c9d638dad00f51a6640a696554c0e8675b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6d6d54c9d638dad00f51a6640a696554c0e8675b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2251051" author="xgen-internal-githook" created="Fri, 17 May 2019 19:42:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;adam.martin@10gen.com&apos;, &apos;name&apos;: &apos;ADAM David Alan Martin&apos;, &apos;username&apos;: &apos;adamlsd&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40156&quot; title=&quot;Initial implementation of Split Horizon&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40156&quot;&gt;&lt;del&gt;SERVER-40156&lt;/del&gt;&lt;/a&gt; Replica sets support Split Horizons&lt;/p&gt;

&lt;p&gt;Replica sets can now respond to `isMaster` requests with&lt;br/&gt;
different hostnames and ports, if contacted via alternate&lt;br/&gt;
names using TLS.  The `horizons` field in replica set&lt;br/&gt;
member configurations can be used to control which&lt;br/&gt;
`HostAndPort` to reply with for which &quot;horizon view&quot; of&lt;br/&gt;
a replica set.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6784f6568cc45fe25510e2d2393be57daffb5411&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6784f6568cc45fe25510e2d2393be57daffb5411&lt;/a&gt;&lt;/p&gt;</comment>
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