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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-18246] getmore on secondary in recovery mode can crash mongos</title>
                <link>https://jira.mongodb.org/browse/SERVER-18246</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;div class=&quot;panel&quot; style=&quot;background-color: #EEEEEE;border-color: #ccc;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;border-bottom-color: #ccc;background-color: #6CB33F;&quot;&gt;&lt;b&gt;Issue Status as of Jun 19, 2015&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #EEEEEE;&quot;&gt;
&lt;p&gt;&lt;b&gt;ISSUE SUMMARY&lt;/b&gt;&lt;br/&gt;
&lt;tt&gt;mongos&lt;/tt&gt; instances maintain connection pools to all shards, and do not manage the lifetime of these connections correctly. This may cause &lt;tt&gt;mongos&lt;/tt&gt; instances to encounter an unrecoverable error and terminate when connecting to a replica set member in the &lt;tt&gt;RECOVERING&lt;/tt&gt; state.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;USER IMPACT&lt;/b&gt;&lt;br/&gt;
&lt;tt&gt;mongos&lt;/tt&gt; instances may terminate in some situations while a replica set member is in the &lt;tt&gt;RECOVERING&lt;/tt&gt; state. &lt;/p&gt;

&lt;p&gt;&lt;b&gt;AFFECTED VERSIONS&lt;/b&gt;&lt;br/&gt;
MongoDB release of 3.0 before 3.0.4.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;FIX VERSION&lt;/b&gt;&lt;br/&gt;
The fix is included in the 3.0.4 production release.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h6&gt;&lt;a name=&quot;Originaldescription&quot;&gt;&lt;/a&gt;Original description&lt;/h6&gt;

&lt;p&gt;Issue:&lt;/p&gt;

&lt;p&gt;Whenever DBClientReplicaSet objects create connections to the nodes, it attaches the pointer to itself on the new connection. This used to be fine since the lifetime of the DBClientReplicaSet connections are guaranteed to be longer than the connection objects it creates. However, this changed with &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9788&quot; title=&quot;mongos does not re-evaluate read preference once a valid replica set member is chosen&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9788&quot;&gt;&lt;del&gt;SERVER-9788&lt;/del&gt;&lt;/a&gt;. The internal connections to the secondaries are now drawn from the pool and put back to the pool. So the life of the internal connection is now independent of the lifetime of the DBClientReplicaSet connection.&lt;/p&gt;

&lt;p&gt;Attaching test script to demonstrate crash.&lt;/p&gt;</description>
                <environment></environment>
        <key id="200868">SERVER-18246</key>
            <summary>getmore on secondary in recovery mode can crash mongos</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>
                            <label>ET</label>
                    </labels>
                <created>Tue, 28 Apr 2015 21:19:19 +0000</created>
                <updated>Wed, 25 Jan 2017 22:00:57 +0000</updated>
                            <resolved>Thu, 7 May 2015 12:03:11 +0000</resolved>
                                    <version>3.1.1</version>
                                    <fixVersion>3.0.4</fixVersion>
                    <fixVersion>3.1.3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="927245" author="xgen-internal-githook" created="Fri, 29 May 2015 13:45:38 +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-18246&quot; title=&quot;getmore on secondary in recovery mode can crash mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18246&quot;&gt;&lt;del&gt;SERVER-18246&lt;/del&gt;&lt;/a&gt; getmore on secondary in recovery mode can crash mongos&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 5fed2241cb67c358f77fd0ff20b2afbcefa55ec1)&lt;/p&gt;

&lt;p&gt;Conflicts:&lt;br/&gt;
	src/mongo/client/dbclient.cpp&lt;br/&gt;
	src/mongo/db/repl/sync_source_feedback.cpp&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dd81a3bec958d1d78913630fd4a3523170fd23db&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dd81a3bec958d1d78913630fd4a3523170fd23db&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="913770" author="giudicelli" created="Thu, 14 May 2015 06:51:37 +0000"  >&lt;p&gt;How come this wasn&apos;t fixed in 3.0.3 ?&lt;/p&gt;</comment>
                            <comment id="907433" author="xgen-internal-githook" created="Thu, 7 May 2015 12:02:10 +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-18246&quot; title=&quot;getmore on secondary in recovery mode can crash mongos&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18246&quot;&gt;&lt;del&gt;SERVER-18246&lt;/del&gt;&lt;/a&gt; getmore on secondary in recovery mode can crash mongos&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5fed2241cb67c358f77fd0ff20b2afbcefa55ec1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5fed2241cb67c358f77fd0ff20b2afbcefa55ec1&lt;/a&gt;&lt;/p&gt;</comment>
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