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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>
    </build-info>


<item>
            <title>[DOCS-2822] Comment on: &quot;manual/tutorial/upgrade-revision.txt&quot;</title>
                <link>https://jira.mongodb.org/browse/DOCS-2822</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;Please consider adding additional details/notes to the upgrade page. I think could be useful for some customers.&lt;/p&gt;

&lt;p&gt;Credit: These are based on notes in a ticket written by &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=duraid.madina%4010gen.com&quot; class=&quot;user-hover&quot; rel=&quot;duraid.madina@10gen.com&quot;&gt;duraid.madina@10gen.com&lt;/a&gt;&lt;/p&gt;

&lt;h6&gt;&lt;a name=&quot;Upgradingthemongosqueryrouters&quot;&gt;&lt;/a&gt;Upgrading the mongos query routers&lt;/h6&gt;
&lt;p&gt;For each &lt;tt&gt;mongos&lt;/tt&gt; router you are running, simply stop it, upgrade it to 2.4.9, and then restart it.&lt;/p&gt;

&lt;p&gt;NOTE - Any client applications which are connected to a &lt;tt&gt;mongos&lt;/tt&gt; will have their connections closed, and they will need to be restarted if they do not contain automatic retry logic. (Most applications already have such logic, as they will need to in order to perform automatic fail-over when a server goes down.)&lt;/p&gt;

&lt;h6&gt;&lt;a name=&quot;Upgradingtheconfigservers&quot;&gt;&lt;/a&gt;Upgrading the config servers&lt;/h6&gt;
&lt;p&gt;For each config server (starting with the last config server in your mongos --configdb) in turn:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Stop the &lt;tt&gt;mongod&lt;/tt&gt; process&lt;/li&gt;
	&lt;li&gt;Upgrade its MongoDB binaries from 2.4.4 to 2.4.9&lt;/li&gt;
	&lt;li&gt;Restart the &lt;tt&gt;mongod&lt;/tt&gt; process&lt;/li&gt;
&lt;/ol&gt;


&lt;h6&gt;&lt;a name=&quot;Upgradingsecondaries&quot;&gt;&lt;/a&gt;Upgrading secondaries&lt;/h6&gt;
&lt;p&gt;Upgrade each of the &lt;b&gt;secondary&lt;/b&gt; &lt;tt&gt;mongod&lt;/tt&gt; servers (and arbiters, if you have any) in every shard, as follows:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;First, stop &lt;b&gt;one&lt;/b&gt; of the replica set secondaries (or arbiters). It is OK to simply shut down the server normally, but do &lt;b&gt;not&lt;/b&gt; aggressively &quot;kill&quot; the servers (using e.g. &lt;tt&gt;kill -9&lt;/tt&gt;.)&lt;/li&gt;
	&lt;li&gt;Next, upgrade its MongoDB binaries from 2.4.4 to 2.4.9&lt;/li&gt;
	&lt;li&gt;Restart it, and wait for it to re-enter the SECONDARY state&lt;/li&gt;
	&lt;li&gt;Repeat this step for the next secondary, until all secondaries have been upgraded&lt;/li&gt;
&lt;/ol&gt;


&lt;h6&gt;&lt;a name=&quot;Upgradingprimaries&quot;&gt;&lt;/a&gt;Upgrading primaries&lt;/h6&gt;
&lt;p&gt;This time, upgrade the &lt;b&gt;primary&lt;/b&gt; &lt;tt&gt;mongod&lt;/tt&gt; server for each shard, as follows:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;First, stop the replica set&apos;s primary. Here, it is important to use the &lt;a href=&quot;http://docs.mongodb.org/manual/reference/replication/#rs.stepDown&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;rs.stepDown()&lt;/tt&gt;&lt;/a&gt; command, as this will ensure one of the (now upgraded) secondaries takes over the role of the primary more rapidly.&lt;/li&gt;
	&lt;li&gt;Next, upgrade its MongoDB binaries from 2.4.4 to 2.4.9&lt;/li&gt;
	&lt;li&gt;Restart it, and wait for it to enter the SECONDARY state. Note that while the primary was down (for you to upgrade its binaries), one of the secondaries should have automatically taken over the PRIMARY role, which is why this node will become SECONDARY.&lt;/li&gt;
&lt;/ol&gt;


&lt;h5&gt;&lt;a name=&quot;Notes%3A&quot;&gt;&lt;/a&gt;Notes:&lt;/h5&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;While it should not be necessary, it is possible to downgrade from 2.4.9 to 2.4.4 by following the same procedure as above.&lt;/li&gt;
	&lt;li&gt;It is important to note that we do not support clusters that run for extended periods of time with differing version of components. We support mixed-version clusters only for the purpose of performing live upgrades, and we encourage you to aim to complete your upgrade in a timely manner.&lt;/li&gt;
&lt;/ul&gt;

</description>
                <environment>&lt;br/&gt;
&lt;br/&gt;
*Location*: &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/upgrade-revision/&quot;&gt;http://docs.mongodb.org/manual/tutorial/upgrade-revision/&lt;/a&gt;&lt;br/&gt;
*User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.117 Safari/537.36&lt;br/&gt;
*Screen Resolution*: 1280 x 800&lt;br/&gt;
*repo*: docs&lt;br/&gt;
*source*: tutorial/upgrade-revision&lt;br/&gt;
</environment>
        <key id="115875">DOCS-2822</key>
            <summary>Comment on: &quot;manual/tutorial/upgrade-revision.txt&quot;</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="andrew.aldridge@mongodb.com">Andrew Aldridge</assignee>
                                    <reporter username="ger.hartnett@mongodb.com">Ger Hartnett</reporter>
                        <labels>
                            <label>collector-298ba4e7</label>
                            <label>sharding</label>
                    </labels>
                <created>Fri, 28 Feb 2014 18:35:47 +0000</created>
                <updated>Mon, 30 Oct 2023 21:51:57 +0000</updated>
                            <resolved>Wed, 27 Jul 2016 17:45:27 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1338003" author="emily.hall" created="Wed, 27 Jul 2016 17:45:27 +0000"  >&lt;p&gt;Closed for housekeeping on 7/27/2016 by Emily Hall. &lt;br/&gt;
If you require additional support, please open a new ticket for prioritization. &lt;br/&gt;
Thanks,&lt;br/&gt;
Emily&lt;/p&gt;</comment>
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