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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-40792] Error details won&apos;t exist if transient transaction error is thrown when handling WouldChangeOwningShard error</title>
                <link>https://jira.mongodb.org/browse/SERVER-40792</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When handling a WouldChangeOwningShard error for a retryable write, we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fe94d588fdc757d4a718f41b307ac00d75db5682/src/mongo/s/commands/cluster_write_cmd.cpp#L240&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;make a call to the ClusterWriter&lt;/a&gt;. In the case that we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fe94d588fdc757d4a718f41b307ac00d75db5682/src/mongo/s/write_ops/batch_write_exec.cpp#L164-L166&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;receive a transient transaction error&lt;/a&gt;, we bypass filling the &lt;tt&gt;BatchedCommandResponse&lt;/tt&gt; object and its &lt;tt&gt;writeErrorDetails&lt;/tt&gt; variable.&lt;/p&gt;

&lt;p&gt;Error handling in the WouldChangeOwningShard path assumes that the &lt;tt&gt;writeErrorDetails&lt;/tt&gt; variable &lt;a href=&quot;https://github.com/mongodb/mongo/blob/fe94d588fdc757d4a718f41b307ac00d75db5682/src/mongo/s/commands/cluster_write_cmd.cpp#L274&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;will be filled&lt;/a&gt;. But in this case, it will be a null pointer and will cause a segmentation fault. We should instead &lt;em&gt;check&lt;/em&gt; if &lt;tt&gt;_writeErrorDetails&lt;/tt&gt; exists, and if not, create it before populating the variable with the error status.&lt;/p&gt;</description>
                <environment></environment>
        <key id="744019">SERVER-40792</key>
            <summary>Error details won&apos;t exist if transient transaction error is thrown when handling WouldChangeOwningShard error</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="13201">Fixed</resolution>
                                        <assignee username="blake.oler@mongodb.com">Blake Oler</assignee>
                                    <reporter username="blake.oler@mongodb.com">Blake Oler</reporter>
                        <labels>
                    </labels>
                <created>Tue, 23 Apr 2019 20:56:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:21:44 +0000</updated>
                            <resolved>Wed, 8 May 2019 16:28:19 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2238705" author="xgen-internal-githook" created="Wed, 8 May 2019 16:26:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Blake Oler&apos;, &apos;username&apos;: &apos;BlakeIsBlake&apos;, &apos;email&apos;: &apos;blake.oler@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40792&quot; title=&quot;Error details won&amp;#39;t exist if transient transaction error is thrown when handling WouldChangeOwningShard error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40792&quot;&gt;&lt;del&gt;SERVER-40792&lt;/del&gt;&lt;/a&gt; Create error details if doesn&apos;t already exist when handling WouldChangeOwningShard error&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f25d7d70ca9b2c0282640779adf5c690c0368f1b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f25d7d70ca9b2c0282640779adf5c690c0368f1b&lt;/a&gt;&lt;/p&gt;</comment>
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