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    <link>https://jira.mongodb.org</link>
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    <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-27460] RouterStageMerge::kill() can crash during mongos shutdown</title>
                <link>https://jira.mongodb.org/browse/SERVER-27460</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;tt&gt;RouterStageMerge::kill()&lt;/tt&gt; retrieves an Event which will be signaled when the mongos cursor is safe to destroy. However, this Event will be invalid if it is retrieved while mongos is shutting down, as documented here:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.5.1/src/mongo/s/query/async_results_merger.h#L170&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.5.1/src/mongo/s/query/async_results_merger.h#L170&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This case is not handled correctly by &lt;tt&gt;RouterStageMerge::kill()&lt;/tt&gt;, since it can wait on an invalid event, resulting in an invariant being triggered. Fixing &lt;tt&gt;RouterStageMerge::kill()&lt;/tt&gt; to not wait on an invalid event is a partial fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25497&quot; title=&quot;Fix sharded query path to handle shutdown of the mongos process&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-25497&quot;&gt;&lt;del&gt;SERVER-25497&lt;/del&gt;&lt;/a&gt;, which describes the more general problem of the mongos query path not being synchronized with the process&apos;s shutdown sequence.&lt;/p&gt;</description>
                <environment></environment>
        <key id="339880">SERVER-27460</key>
            <summary>RouterStageMerge::kill() can crash during mongos shutdown</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Mon, 19 Dec 2016 19:37:29 +0000</created>
                <updated>Wed, 5 Apr 2017 11:43:44 +0000</updated>
                            <resolved>Wed, 18 Jan 2017 19:50:55 +0000</resolved>
                                    <version>3.2.11</version>
                    <version>3.4.0</version>
                                    <fixVersion>3.2.13</fixVersion>
                    <fixVersion>3.4.2</fixVersion>
                    <fixVersion>3.5.2</fixVersion>
                                    <component>Querying</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1491078" author="xgen-internal-githook" created="Thu, 2 Feb 2017 18:01:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27460&quot; title=&quot;RouterStageMerge::kill() can crash during mongos shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27460&quot;&gt;&lt;del&gt;SERVER-27460&lt;/del&gt;&lt;/a&gt; fix RouterStageMerge::kill() crash during mongos shutdown&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c43d7cd31af6854eaf134f8021d9f0784ddf5070)&lt;/p&gt;

&lt;p&gt;Conflicts:&lt;br/&gt;
	src/mongo/s/query/async_results_merger.cpp&lt;br/&gt;
	src/mongo/s/query/async_results_merger_test.cpp&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3533501da0803d9d7d4fa169f9f3bc5af7cd4a52&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3533501da0803d9d7d4fa169f9f3bc5af7cd4a52&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1482958" author="xgen-internal-githook" created="Mon, 23 Jan 2017 19:29:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27460&quot; title=&quot;RouterStageMerge::kill() can crash during mongos shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27460&quot;&gt;&lt;del&gt;SERVER-27460&lt;/del&gt;&lt;/a&gt; fix RouterStageMerge::kill() crash during mongos shutdown&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c43d7cd31af6854eaf134f8021d9f0784ddf5070)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cf7c424372c733f572831c42f3a5810bef45543e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cf7c424372c733f572831c42f3a5810bef45543e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1479661" author="xgen-internal-githook" created="Wed, 18 Jan 2017 19:47:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27460&quot; title=&quot;RouterStageMerge::kill() can crash during mongos shutdown&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27460&quot;&gt;&lt;del&gt;SERVER-27460&lt;/del&gt;&lt;/a&gt; fix RouterStageMerge::kill() crash during mongos shutdown&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c43d7cd31af6854eaf134f8021d9f0784ddf5070&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c43d7cd31af6854eaf134f8021d9f0784ddf5070&lt;/a&gt;&lt;/p&gt;</comment>
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