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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-39268] make prepare_conflict.js more robust</title>
                <link>https://jira.mongodb.org/browse/SERVER-39268</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This came out of BF-11662. &lt;/p&gt;

&lt;p&gt;prepare_conflict.js tests that when we attempt to read a document that a prepared transaction modified, it returns a prepare conflict. We do this by checking if a find command times out with the MaxTimeMSExpired error code. We then parse the profiler for the slow find command and make sure there&apos;s a prepare conflict. &lt;/p&gt;

&lt;p&gt;The current timeout is 1 second. It is possible that the operation can time out while waiting for a collection level X lock, which is held by the prepared transaction. If it times out before it can acquire the lock, the find will not return a prepare conflict. &lt;/p&gt;

&lt;p&gt;There are a few solutions we could try to address this issue:&lt;br/&gt;
1. Increase the timeout to account for slow machines (maybe 5 seconds)&lt;br/&gt;
2. Remove the parsing of the profiler log line and assume that if the find timed out, it would have run into a prepare conflict. &lt;br/&gt;
3. Introduce a fail point where if the command times out because of a prepare conflict, return a prepare conflict error. This way, we can explicitly check for this error code instead of checking for MaxTimeMSExpired.&lt;/p&gt;</description>
                <environment></environment>
        <key id="679729">SERVER-39268</key>
            <summary>make prepare_conflict.js more robust</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</assignee>
                                    <reporter username="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</reporter>
                        <labels>
                    </labels>
                <created>Tue, 29 Jan 2019 18:06:59 +0000</created>
                <updated>Sun, 29 Oct 2023 22:24:38 +0000</updated>
                            <resolved>Tue, 29 Jan 2019 21:05:19 +0000</resolved>
                                                    <fixVersion>4.1.8</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2132319" author="xgen-internal-githook" created="Wed, 30 Jan 2019 18:23:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;pvselvan@umich.edu&apos;, &apos;name&apos;: &apos;Pavi Vetriselvan&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-39268&quot; title=&quot;make prepare_conflict.js more robust&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-39268&quot;&gt;&lt;del&gt;SERVER-39268&lt;/del&gt;&lt;/a&gt; make prepare_conflict.js more robust&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9c83ead9257d0d41d7b7ec92adf441bf34b0c3a8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9c83ead9257d0d41d7b7ec92adf441bf34b0c3a8&lt;/a&gt;&lt;/p&gt;</comment>
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