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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-40049] Make OplogBuffer use ProducerConsumerQueue instead of BlockingQueue</title>
                <link>https://jira.mongodb.org/browse/SERVER-40049</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The replication oplog buffer is the last and only user of BlockingQueue in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/util/queue.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/master/src/mongo/util/queue.h&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;It would be better if we could switch to the ProducerConsumerQueue in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/util/producer_consumer_queue.h&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/master/src/mongo/util/producer_consumer_queue.h&lt;/a&gt;, which is used elsewhere in the code.&lt;/p&gt;</description>
                <environment></environment>
        <key id="713958">SERVER-40049</key>
            <summary>Make OplogBuffer use ProducerConsumerQueue instead of BlockingQueue</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="matthew.russotto@mongodb.com">Matthew Russotto</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Mar 2019 20:20:31 +0000</created>
                <updated>Tue, 22 Aug 2023 14:21:24 +0000</updated>
                            <resolved>Tue, 22 Aug 2023 14:21:24 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2875140" author="milkie" created="Wed, 12 Feb 2020 21:47:05 +0000"  >&lt;p&gt;Yeah sorry &amp;#8211; those particular things were the original reasons that triggered me to write my own custom thread-safe queue in the first place..&lt;/p&gt;</comment>
                            <comment id="2875101" author="matthew.russotto" created="Wed, 12 Feb 2020 21:29:39 +0000"  >&lt;p&gt;Looks like queue.h may survive a bit longer.  PCQ is missing some things &amp;#8211; waitForSpace, clear, count of items in queue.  Some of these are easy to add but I think clear() doesn&apos;t really fit with the way PCQ wants to do things.&lt;/p&gt;</comment>
                            <comment id="2875020" author="matthew.russotto" created="Wed, 12 Feb 2020 21:01:45 +0000"  >&lt;p&gt;If we want to backport this to 4.2, we will need to backport &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42997&quot; title=&quot;Make OplogApplier::enqueue blocking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42997&quot;&gt;&lt;del&gt;SERVER-42997&lt;/del&gt;&lt;/a&gt; also.&lt;/p&gt;</comment>
                            <comment id="2785368" author="milkie" created="Wed, 5 Feb 2020 18:21:12 +0000"  >&lt;p&gt;I&apos;m just impressed that a class I wrote back in 2012 is still in use even today!  I certainly didn&apos;t expect it to last this long..&lt;/p&gt;

&lt;p&gt;commit f31d4d9acaee1e11f2ff0f1e84929ffb684ae053&lt;br/&gt;
Author: Eric Milkie &amp;lt;milkie@10gen.com&amp;gt;&lt;br/&gt;
Date:   Mon Apr 30 11:26:55 2012 -0400&lt;/p&gt;

&lt;p&gt;    implement max-size thread-safe queue class&lt;/p&gt;</comment>
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            <issuekey id="709101">SERVER-39950</issuekey>
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