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<item>
            <title>[SERVER-47917] The JournalFlusher is hitting WriteConflictExceptions thrown by EBUSY cursor errors caused by the validate cmd doing WT:verify on the same collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-47917</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The JournalFlusher is reading the oplog collection without any collection level locks, so it can run concurrently with a full:true validate command on the same collection. Opening a cursor while validate calls WT:verify will cause a WT EBUSY error, which MongoDB converts into a WriteConflictException. Query normally retries reads when given a &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5e7a3c4b743d2f06b429ff0df287a31c0767ae35/src/mongo/db/repl/storage_interface_impl.cpp#L1063&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;WRITE_CONFLICT_RETRY_ONLY &lt;/a&gt; yield policy, but for some reason it gets to the &lt;a href=&quot;https://github.com/mongodb/mongo/blob/5e7a3c4b743d2f06b429ff0df287a31c0767ae35/src/mongo/db/query/plan_executor_impl.cpp#L604-L607&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;retry code and finds a NO_YIELD policy&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-47959&quot; title=&quot;Retry JournalFlusher oplog reads on WriteConflictExceptions caused by concurrent {full:true} validate command on the oplog collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-47959&quot;&gt;&lt;del&gt;SERVER-47959&lt;/del&gt;&lt;/a&gt; will temporarily resolve the test failures by retrying at a higher level, until this bug can be tracked down.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1338763">SERVER-47917</key>
            <summary>The JournalFlusher is hitting WriteConflictExceptions thrown by EBUSY cursor errors caused by the validate cmd doing WT:verify on the same collection</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="13202">Works as Designed</resolution>
                                        <assignee username="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="dianna.hohensee@mongodb.com">Dianna Hohensee</reporter>
                        <labels>
                    </labels>
                <created>Mon, 4 May 2020 13:44:40 +0000</created>
                <updated>Fri, 27 Oct 2023 13:52:51 +0000</updated>
                            <resolved>Tue, 5 May 2020 20:36:04 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3070339" author="dianna.hohensee" created="Tue, 5 May 2020 20:36:04 +0000"  >&lt;p&gt;This is not a bug, like I thought it was. Eric helped explain.&lt;/p&gt;

&lt;p&gt;The YieldPolicy passed into the PlanExecutor only applies when a query yields. If the query is just starting and it immediately hits a WriteConflictException (thrown by the storage integration layer because of a WT EBUSY err) while trying to open a cursor, then there is no YieldPolicy in affect.&lt;/p&gt;</comment>
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