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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-27147] Do not initial sync data written with setReplicatedWrites(false)</title>
                <link>https://jira.mongodb.org/browse/SERVER-27147</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In MapReduce, incremental collections are cloned in initial sync even though they are created with &lt;tt&gt;setReplicatedWrites(false)&lt;/tt&gt;. This appears to be the only place this is an issue, though we should make sure there are no other places where this should be handled.&lt;/p&gt;</description>
                <environment></environment>
        <key id="333468">SERVER-27147</key>
            <summary>Do not initial sync data written with setReplicatedWrites(false)</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="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="judah.schvimer@mongodb.com">Judah Schvimer</reporter>
                        <labels>
                            <label>todo_in_code</label>
                    </labels>
                <created>Mon, 21 Nov 2016 23:03:22 +0000</created>
                <updated>Tue, 6 Dec 2022 04:11:12 +0000</updated>
                            <resolved>Thu, 7 Jun 2018 20:58:20 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1914371" author="spencer" created="Thu, 7 Jun 2018 20:58:03 +0000"  >&lt;p&gt;MapReduce inc collections were the only known offenders here, and those were moved to the local database in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35365&quot; title=&quot;MapReduce temporary inc collections should be written to the local database&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35365&quot;&gt;&lt;del&gt;SERVER-35365&lt;/del&gt;&lt;/a&gt;.  Thus this issue has gone away.&lt;/p&gt;

&lt;p&gt;I filed &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-35498&quot; title=&quot;Unblacklist mapReduce tests from the initial sync dynamic passthrough&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-35498&quot;&gt;&lt;del&gt;SERVER-35498&lt;/del&gt;&lt;/a&gt; for re-enabling test coverage of initial sync and mapReduce.&lt;/p&gt;</comment>
                            <comment id="1526907" author="judah.schvimer" created="Fri, 17 Mar 2017 18:15:46 +0000"  >&lt;p&gt;This is also an issue for &lt;tt&gt;convertToCapped&lt;/tt&gt;.  If a server creates the temporary collection and then crashes before renaming it, it will leave a temporary collection around until it is elected primary. At startup and rollback we should also drop these &quot;local temporary&quot; collections.&lt;/p&gt;</comment>
                            <comment id="1453964" author="schwerin" created="Fri, 9 Dec 2016 16:54:55 +0000"  >&lt;p&gt;I believe that when this happens, if the node that has replicated the &quot;no replicate&quot; collection is elected primary, it will delete that temp collection, and then the secondaries will crash because they don&apos;t know about the collection. On restart, if some &lt;b&gt;other&lt;/b&gt; node is elected primary, the suspect node will enter rollback, see that the temporary collection no longer exists, and happily go about its recovery, ending up in a consistent state. Not great, but not corrupting. Since this bug has existed as long as mapreduce and I&apos;ve never heard a user complaint, I&apos;m not going to schedule this work now.&lt;/p&gt;</comment>
                            <comment id="1453927" author="schwerin" created="Fri, 9 Dec 2016 16:42:57 +0000"  >&lt;p&gt;I think the real problem is that mapreduce is doing the wrong thing by creating these non-replicated temp collections somewhere other than the &quot;local&quot; database. Or that we need to be able to mark collections as non-replicated, but that seems... perilous.&lt;/p&gt;</comment>
                            <comment id="1444807" author="judah.schvimer" created="Tue, 29 Nov 2016 17:13:34 +0000"  >&lt;p&gt;When fixing this, also un-blacklist the MapReduce tests from the initial sync dynamic passthroughs.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="555760">SERVER-35498</issuekey>
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            <issuekey id="504971">SERVER-33638</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="334897">SERVER-27206</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="881103">SERVER-42554</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="935567">SERVER-43460</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="330757">SERVER-26965</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="430901">SERVER-31216</issuekey>
        </issuelink>
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