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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-24285] MongoDB Initial Sync failing repeatedly</title>
                <link>https://jira.mongodb.org/browse/SERVER-24285</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;I have a one member mongod instance (Server1) with a very large DB with 2.5 million documents (Each document is very big) and 4 indices.&lt;/li&gt;
	&lt;li&gt;Then I added another machine (Server2)to this replica set. Mongod on Server2 takes about 5 hours to fetch all the documents in this big database.&lt;/li&gt;
	&lt;li&gt;After all the documents are fetched by Server2, It starts making secondary indices. It takes around 3 hours for indices to get finished.&lt;/li&gt;
	&lt;li&gt;Immediately after completing building the secondary indices, It tries to connect to primary and finds that socket is expired and timed out.&lt;/li&gt;
	&lt;li&gt;At having received a timeout error it (Server2) simply drops all databases and starts the initial sync again.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Logs are attached as an image.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="289292">SERVER-24285</key>
            <summary>MongoDB Initial Sync failing repeatedly</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="-1">Unassigned</assignee>
                                    <reporter username="vaidabhishek">Abhishek Vaid</reporter>
                        <labels>
                    </labels>
                <created>Wed, 25 May 2016 12:47:38 +0000</created>
                <updated>Tue, 31 May 2016 17:45:22 +0000</updated>
                            <resolved>Tue, 31 May 2016 17:45:22 +0000</resolved>
                                    <version>3.2.3</version>
                                                    <component>Index Maintenance</component>
                    <component>Networking</component>
                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1279892" author="thomas.schubert" created="Tue, 31 May 2016 17:45:22 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=vaidabhishek&quot; class=&quot;user-hover&quot; rel=&quot;vaidabhishek&quot;&gt;vaidabhishek&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I would recommend ensuring that TCP keepalives are working and are frequent enough. Please note that SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-users group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;. A question like this involving more discussion would be best posted on the mongodb-users group. See also our &lt;a href=&quot;https://docs.mongodb.org/manual/support&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Additionally, we have work scheduled in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-8076&quot; title=&quot;Increased tolerance around network connectivity issues on initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-8076&quot;&gt;&lt;del&gt;SERVER-8076&lt;/del&gt;&lt;/a&gt; that would mitigate this issue and make it less important to have properly configured TCP keepalives. Please feel free to vote for it and watch it for updates.&lt;/p&gt;

&lt;p&gt;Kind regards,&lt;br/&gt;
Thomas&lt;/p&gt;</comment>
                            <comment id="1274642" author="vaidabhishek" created="Wed, 25 May 2016 12:48:37 +0000"  >&lt;p&gt;Sorry for typos, I have typed this from a phone. &lt;/p&gt;</comment>
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