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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-6894] RunOnAllShardsCommand() can receive an empty message, which currently causes an assertion failure</title>
                <link>https://jira.mongodb.org/browse/SERVER-6894</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;tt&gt;RunOnAllShardsCommand::run()&lt;/tt&gt; (parallel.cpp L144 in master), we check for an error response from each future:&lt;/p&gt;
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&lt;p/&gt;

&lt;p&gt;In this code, we access the &quot;errmsg&quot; field in the result object without first checking that the result object is valid/non-empty.  If a command fails, we end up with an invalid result object, then assert when trying to access the errmsg field (as it doesn&apos;t exist, and the object is likely empty/invalid anyway).&lt;/p&gt;

&lt;p&gt;Note that even if one server returns a bad response, this bug will cause all responses to fail, even if successfully executed on the remote server.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="48589">SERVER-6894</key>
            <summary>RunOnAllShardsCommand() can receive an empty message, which currently causes an assertion failure</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="benjamin.becker">Ben Becker</reporter>
                        <labels>
                            <label>commands</label>
                            <label>sharding</label>
                    </labels>
                <created>Wed, 29 Aug 2012 22:06:18 +0000</created>
                <updated>Tue, 6 Nov 2012 17:49:39 +0000</updated>
                            <resolved>Thu, 30 Aug 2012 04:55:40 +0000</resolved>
                                    <version>2.0.7</version>
                    <version>2.2.0</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
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                            <issuelinktype id="10010">
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