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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-46518] Legacy MR shardedfinish can target a former primary</title>
                <link>https://jira.mongodb.org/browse/SERVER-46518</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This causes the overall MR to fail with &quot;not master and slaveOk=false&quot; when trying to establish cursors on the shards, because the cursors are supposed to be against the primary but if there has been an election then the node the query is sent to might now be a secondary.  It&apos;s not clear to me if the MR should just read from the secondary, or if this is just another failure mode of the legacy MR system (ie. it&apos;s simply not robust to any elections at any point during its runtime).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1210710">SERVER-46518</key>
            <summary>Legacy MR shardedfinish can target a former primary</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                            <label>qopt-team</label>
                    </labels>
                <created>Mon, 2 Mar 2020 05:39:50 +0000</created>
                <updated>Tue, 10 Mar 2020 20:31:23 +0000</updated>
                            <resolved>Tue, 10 Mar 2020 20:31:23 +0000</resolved>
                                                                    <component>MapReduce</component>
                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="2961941" author="nicholas.zolnierz" created="Tue, 10 Mar 2020 20:31:23 +0000"  >&lt;p&gt;Closing as won&apos;t fix since the new implementation using agg fixes the issue on master/v4.4, and we don&apos;t plan to backport for legacy MR. &lt;/p&gt;</comment>
                            <comment id="2948940" author="nicholas.zolnierz" created="Fri, 6 Mar 2020 18:30:17 +0000"  >&lt;p&gt;Ok thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ali.mir&quot; class=&quot;user-hover&quot; rel=&quot;ali.mir&quot;&gt;ali.mir&lt;/a&gt;, I&apos;m going to link the BF to your ticket instead and flag this one for re-triage. We may end up closing as won&apos;t fix given it&apos;s only relevant for pre-v4.4&lt;br/&gt;
 MR. &lt;/p&gt;</comment>
                            <comment id="2948919" author="ali.mir" created="Fri, 6 Mar 2020 18:19:18 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=nicholas.zolnierz&quot; class=&quot;user-hover&quot; rel=&quot;nicholas.zolnierz&quot;&gt;nicholas.zolnierz&lt;/a&gt; Yes, &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46300&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;SERVER-46300&lt;/a&gt; should fix this bug. The fix is currently in progress.&lt;/p&gt;</comment>
                            <comment id="2948888" author="nicholas.zolnierz" created="Fri, 6 Mar 2020 18:07:08 +0000"  >&lt;p&gt;Although the linked BF shows different symptoms, I think the fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-46300&quot; title=&quot;Set high election timeout in map_reduce_multiversion_cluster.js &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-46300&quot;&gt;&lt;del&gt;SERVER-46300&lt;/del&gt;&lt;/a&gt; will indirectly fix this bug as well. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ali.mir&quot; class=&quot;user-hover&quot; rel=&quot;ali.mir&quot;&gt;ali.mir&lt;/a&gt; do you agree? &lt;/p&gt;

&lt;p&gt;P.S. this test is only relevant for 4.4 and will soon be deleted, so any fixes should really only be on the 4.4 branch. Also legacy mapReduce has never worked well in the presence of step-downs so I don&apos;t think there&apos;s any novel issue being exposed here.&lt;/p&gt;</comment>
                            <comment id="2934417" author="david.storch" created="Wed, 4 Mar 2020 15:42:00 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt; whoops! That&apos;s correct.&lt;/p&gt;</comment>
                            <comment id="2933003" author="charlie.swanson" created="Tue, 3 Mar 2020 19:37:58 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=david.storch&quot; class=&quot;user-hover&quot; rel=&quot;david.storch&quot;&gt;david.storch&lt;/a&gt; I assume you didn&apos;t mean to assign this to yourself? &lt;/p&gt;</comment>
                            <comment id="2932484" author="david.storch" created="Tue, 3 Mar 2020 16:41:43 +0000"  >&lt;p&gt;Sending to the query optimization team because the associated test failure happened in a multiVersion test recently added as part of the mapReduce in agg refactor.&lt;/p&gt;</comment>
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