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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-9853] Ghostsyncing does not retry after a network failure</title>
                <link>https://jira.mongodb.org/browse/SERVER-9853</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It needs to try to reconnect immediately.&lt;br/&gt;
Non-ghostsync updates do not have this problem because the updater runs in a loop and keeps trying until it succeeds in transmitting the oplog position update.  &lt;br/&gt;
The current Ghostsync code gives up if there is a network failure and doesn&apos;t get resolved until the next write is applied. This is &apos;ok&apos; if there are lots of writes, but pretty bad if there are no writes for a while (because write concern on the primary will not see it).&lt;/p&gt;

&lt;p&gt;This logic will be better solved by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6071&quot; title=&quot;Use command on local.slaves instead of cursor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6071&quot;&gt;&lt;del&gt;SERVER-6071&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="77687">SERVER-9853</key>
            <summary>Ghostsyncing does not retry after a network failure</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Mon, 3 Jun 2013 18:08:34 +0000</created>
                <updated>Mon, 11 Jul 2016 17:39:07 +0000</updated>
                            <resolved>Mon, 10 Jun 2013 15:28:03 +0000</resolved>
                                    <version>2.4.3</version>
                    <version>2.5.0</version>
                                    <fixVersion>2.4.5</fixVersion>
                    <fixVersion>2.5.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="364470" author="auto" created="Thu, 20 Jun 2013 20:17:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9853&quot; title=&quot;Ghostsyncing does not retry after a network failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9853&quot;&gt;&lt;del&gt;SERVER-9853&lt;/del&gt;&lt;/a&gt; avoid Windows test shutdown issues by stopping the test explicitly&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/073bfa9db6461c27c4d19135ef256c5627b4cdbc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/073bfa9db6461c27c4d19135ef256c5627b4cdbc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="364463" author="auto" created="Thu, 20 Jun 2013 20:11:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9853&quot; title=&quot;Ghostsyncing does not retry after a network failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9853&quot;&gt;&lt;del&gt;SERVER-9853&lt;/del&gt;&lt;/a&gt; avoid Windows test shutdown issues by stopping the test explicitly&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/021b9bb6946bc7f07f88c176a081e53b2db36e49&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/021b9bb6946bc7f07f88c176a081e53b2db36e49&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="363811" author="auto" created="Thu, 20 Jun 2013 00:21:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9853&quot; title=&quot;Ghostsyncing does not retry after a network failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9853&quot;&gt;&lt;del&gt;SERVER-9853&lt;/del&gt;&lt;/a&gt; retry ghostsync percolate if socket failure&lt;/p&gt;

&lt;p&gt;Without this fix, depending on exact timing of upstream socket failure, you could lose&lt;br/&gt;
a chaining upstream oplog position update from a secondary.  This might then cause&lt;br/&gt;
a write with a certain level of write concern to time out even though enough secondaries&lt;br/&gt;
had applied the write.  This problem would be masked by a sufficient number of subsequent&lt;br/&gt;
writes, which would trigger another upstream oplog position update.&lt;/p&gt;

&lt;p&gt;Note that this only affects chaining; nonchaining updates are already retrying when a socket&lt;br/&gt;
failure occurs.&lt;/p&gt;

&lt;p&gt;Conflicts:&lt;/p&gt;

&lt;p&gt;	src/mongo/db/repl/rs_sync.cpp&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b82d99d5b8b2de63f9bfa5928793285526a81986&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b82d99d5b8b2de63f9bfa5928793285526a81986&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="356849" author="auto" created="Mon, 10 Jun 2013 15:27:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9853&quot; title=&quot;Ghostsyncing does not retry after a network failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9853&quot;&gt;&lt;del&gt;SERVER-9853&lt;/del&gt;&lt;/a&gt; retry ghostsync percolate if socket failure&lt;/p&gt;

&lt;p&gt;Without this fix, depending on exact timing of upstream socket failure, you could lose&lt;br/&gt;
a chaining upstream oplog position update from a secondary.  This might then cause&lt;br/&gt;
a write with a certain level of write concern to time out even though enough secondaries&lt;br/&gt;
had applied the write.  This problem would be masked by a sufficient number of subsequent&lt;br/&gt;
writes, which would trigger another upstream oplog position update.&lt;/p&gt;

&lt;p&gt;Note that this only affects chaining; nonchaining updates are already retrying when a socket&lt;br/&gt;
failure occurs.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5e02976117c3ea90318326670cba51975b957ca9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5e02976117c3ea90318326670cba51975b957ca9&lt;/a&gt;&lt;/p&gt;</comment>
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