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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-28989] Avoid dropping dummy database in ReplSetTest.prototype.checkReplicaSet()</title>
                <link>https://jira.mongodb.org/browse/SERVER-28989</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.6/src/mongo/shell/replsettest.js#L1159-L1160&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;The &lt;tt&gt;ReplSetTest.prototype.checkReplicaSet()&lt;/tt&gt; function drops the dummy database to avoid leaving around any unnecessary data files&lt;/a&gt;; however, repeatedly creating and dropping a database with a unique name incurs a significant amount of I/O overhead when running with the MMAPv1 storage engine since data files must be allocated and deleted each time, respectively. Given that &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.6/src/mongo/shell/replsettest.js#L1125-L1130&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the procedure for flushing any pending background index builds&lt;/a&gt; is performed by running a &quot;collMod&quot; command for each collection, there&apos;s no requirement that the database for the &lt;tt&gt;w=all&lt;/tt&gt; replicated write needs to have a unique name.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// Since we cannot determine if there is a background index in progress (SERVER-26624),&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;// we flush indexing as follows:&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//  1. Iterate through all collections and run collMod against each (collMod will block&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//     replication to wait for any active background index builds to complete)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//  2. Insert a document into a dummy collection with a writeConcern for all nodes (which&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #008200; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;//     will block on completion of the background index build + collMod)&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="377912">SERVER-28989</key>
            <summary>Avoid dropping dummy database in ReplSetTest.prototype.checkReplicaSet()</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="13201">Fixed</resolution>
                                        <assignee username="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>bkp</label>
                    </labels>
                <created>Wed, 26 Apr 2017 20:13:20 +0000</created>
                <updated>Mon, 30 Oct 2023 23:17:10 +0000</updated>
                            <resolved>Fri, 28 Apr 2017 18:57:49 +0000</resolved>
                                                    <fixVersion>3.4.15</fixVersion>
                    <fixVersion>3.5.7</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1844409" author="xgen-internal-githook" created="Sun, 25 Mar 2018 05:26:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;max.hirschhorn@mongodb.com&apos;, &apos;name&apos;: &apos;Max Hirschhorn&apos;, &apos;username&apos;: &apos;visemet&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28989&quot; title=&quot;Avoid dropping dummy database in ReplSetTest.prototype.checkReplicaSet()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28989&quot;&gt;&lt;del&gt;SERVER-28989&lt;/del&gt;&lt;/a&gt; Avoid dropping dummy database in checkReplicaSet().&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 5c702fedb3216b1a327d3791cd9e995fefc4ab2f)&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30900&quot; title=&quot;remove collMod writeConcern argument from ReplSetTest.checkReplicaSet()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30900&quot;&gt;&lt;del&gt;SERVER-30900&lt;/del&gt;&lt;/a&gt; removed unnecessary writeConcern from collMod command in&lt;br/&gt;
ReplSetTest.checkReplicaSet()&lt;/p&gt;

&lt;p&gt;(cherry picked from commit ac84a0d028eff2b8ca42817d998cb8b34563816c)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b910f64caeac3761445eed604fceaf0698e02447&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b910f64caeac3761445eed604fceaf0698e02447&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1560537" author="xgen-internal-githook" created="Fri, 28 Apr 2017 18:57:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28989&quot; title=&quot;Avoid dropping dummy database in ReplSetTest.prototype.checkReplicaSet()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28989&quot;&gt;&lt;del&gt;SERVER-28989&lt;/del&gt;&lt;/a&gt; Avoid dropping dummy database in checkReplicaSet().&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5c702fedb3216b1a327d3791cd9e995fefc4ab2f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5c702fedb3216b1a327d3791cd9e995fefc4ab2f&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
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                            <issuelinktype id="10011">
                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="303032">SERVER-25196</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="367879">SERVER-28507</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="502582">SERVER-33498</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="421983">SERVER-30900</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="323558">SERVER-26624</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
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