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    <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-1722] sysctl.net.ipv4.ip_nonlocal_bind=1 break replica sets</title>
                <link>https://jira.mongodb.org/browse/SERVER-1722</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;net.ipv4.ip_nonlocal_bind=1 is set to use linux-ha/heartbeat. Programs must be able to bind to any ip, even non-existing ones. &lt;/p&gt;

&lt;p&gt;However, if that sysctl is in effect, then it breaks replica sets and possible other features. &lt;/p&gt;

&lt;p&gt;See util/message.cpp, around line 720: &lt;br/&gt;
            bool ret = (::bind(sock, addr.raw(), addr.addressSize) == 0);&lt;/p&gt;

&lt;p&gt;It is always true in case this sysctl is in effect. So you cannot rs.add(), or rs.initiate() any server. &lt;/p&gt;

&lt;p&gt;Another side effect is that it took about four hours to debug, including source downloading and debugging and the error report &quot;bad config - dups?&quot; is absolutely not explanatory. &lt;/p&gt;</description>
                <environment>Ubuntu 10.04.01</environment>
        <key id="12988">SERVER-1722</key>
            <summary>sysctl.net.ipv4.ip_nonlocal_bind=1 break replica sets</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="egorfine">Egor Egorov</reporter>
                        <labels>
                    </labels>
                <created>Thu, 2 Sep 2010 23:22:31 +0000</created>
                <updated>Tue, 12 Jul 2016 00:18:38 +0000</updated>
                            <resolved>Mon, 27 Sep 2010 22:26:28 +0000</resolved>
                                    <version>1.6.0</version>
                    <version>1.6.1</version>
                    <version>1.6.2</version>
                                    <fixVersion>1.7.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="18608" author="redbeard0531" created="Mon, 27 Sep 2010 22:26:28 +0000"  >&lt;p&gt;See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1515&quot; title=&quot;Find better way to implement HostAndPort::isSelf()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1515&quot;&gt;&lt;del&gt;SERVER-1515&lt;/del&gt;&lt;/a&gt; for fixes&lt;/p&gt;</comment>
                            <comment id="18170" author="redbeard0531" created="Tue, 14 Sep 2010 20:24:35 +0000"  >&lt;p&gt;Please try today&apos;s nightly&lt;/p&gt;</comment>
                            <comment id="17871" author="redbeard0531" created="Tue, 7 Sep 2010 23:08:56 +0000"  >&lt;p&gt;Nevermind, had to revert that change&lt;/p&gt;</comment>
                            <comment id="17869" author="redbeard0531" created="Tue, 7 Sep 2010 22:52:04 +0000"  >&lt;p&gt;This should be fixed in master. Reopen if you you still have issues.&lt;/p&gt;</comment>
                            <comment id="17738" author="egorfine" created="Fri, 3 Sep 2010 01:30:50 +0000"  >&lt;p&gt;Maybe make a short note in the documentation until it&apos;s fixed to save other poor souls like me? &lt;/p&gt;</comment>
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