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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-15593] Initial autosplit heuristics are very aggressive when config servers are down</title>
                <link>https://jira.mongodb.org/browse/SERVER-15593</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The assumption is that lots of data will be inserted, and distributing chunks when the data size is small is much less expensive than later.  However, on repeated failure, this may need to be reconsidered.&lt;/p&gt;</description>
                <environment></environment>
        <key id="162904">SERVER-15593</key>
            <summary>Initial autosplit heuristics are very aggressive when config servers are down</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="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Oct 2014 20:22:38 +0000</created>
                <updated>Mon, 11 Jul 2016 17:17:00 +0000</updated>
                            <resolved>Wed, 29 Oct 2014 17:06:13 +0000</resolved>
                                    <version>2.7.7</version>
                                    <fixVersion>2.8.0-rc0</fixVersion>
                                    <component>Sharding</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="751619" author="xgen-internal-githook" created="Wed, 29 Oct 2014 17:05:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15593&quot; title=&quot;Initial autosplit heuristics are very aggressive when config servers are down&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15593&quot;&gt;&lt;del&gt;SERVER-15593&lt;/del&gt;&lt;/a&gt; Initial autosplit heuristics are very aggressive when config servers are down&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fbbb0d2a1d845728cd714272199a652573e2f27d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fbbb0d2a1d845728cd714272199a652573e2f27d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="738668" author="renctan" created="Fri, 10 Oct 2014 15:26:13 +0000"  >&lt;p&gt;The problem here has to do with the prepare method in SyncClusterConnection (aka scc, connections for 3 config servers - &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r2.6.4/src/mongo/client/syncclusterconnection.cpp#L76&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r2.6.4/src/mongo/client/syncclusterconnection.cpp#L76&lt;/a&gt;) that gets called before every write to the config server. The scc appears to keep the connections within it so whenever it tries to call fsync on the downed config server, it will trigger the auto-reconnect logic, which has a backOff (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r2.6.4/src/mongo/client/dbclient.cpp#L994&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r2.6.4/src/mongo/client/dbclient.cpp#L994&lt;/a&gt;) that gets longer and longer (twice every time) until it reaches the max of 1 second.&lt;/p&gt;</comment>
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            <issuekey id="198460">SERVER-18096</issuekey>
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