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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-68689] Switch background validation to use checkpoint cursors again</title>
                <link>https://jira.mongodb.org/browse/SERVER-68689</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="2109834">SERVER-68689</key>
            <summary>Switch background validation to use checkpoint cursors again</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="yuhong.zhang@mongodb.com">Yuhong Zhang</assignee>
                                    <reporter username="yuhong.zhang@mongodb.com">Yuhong Zhang</reporter>
                        <labels>
                    </labels>
                <created>Tue, 9 Aug 2022 17:57:37 +0000</created>
                <updated>Sun, 29 Oct 2023 21:34:43 +0000</updated>
                            <resolved>Mon, 10 Oct 2022 01:56:07 +0000</resolved>
                                                    <fixVersion>6.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="4896396" author="JIRAUSER1258229" created="Tue, 11 Oct 2022 23:13:06 +0000"  >&lt;p&gt;I don&apos;t think it is creating noise at the moment, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=yuhong.zhang%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;yuhong.zhang@mongodb.com&quot;&gt;yuhong.zhang@mongodb.com&lt;/a&gt;, let us know if this changes. We are now working on &lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="4894694" author="keith.smith" created="Tue, 11 Oct 2022 15:34:33 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt; shouldn&apos;t be hard to fix. Based on the comments, the fix I suggested in this comment&#160;should work and it&apos;s a one or two line change. The hard part, IMHO, will be writing a reproducer.&#160;&lt;/p&gt;

&lt;p&gt;In terms of next steps, Storage Engines should prioritize the fix. As to whether to re-revert &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt;, I think that depends on how much noise it&apos;s creating in testing.&#160;&lt;/p&gt;</comment>
                            <comment id="4893092" author="JIRAUSER1258229" created="Tue, 11 Oct 2022 04:09:42 +0000"  >&lt;p&gt;Thanks for the additional information &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=yuhong.zhang%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;yuhong.zhang@mongodb.com&quot;&gt;yuhong.zhang@mongodb.com&lt;/a&gt;.&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=keith.smith%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;keith.smith@mongodb.com&quot;&gt;keith.smith@mongodb.com&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=vamsi.krishna%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;vamsi.krishna@mongodb.com&quot;&gt;vamsi.krishna@mongodb.com&lt;/a&gt;, should we ask for the revert of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt; until &lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt; is resolved? The good thing is that checkpoint cursor is not a feature available to customers yet and having more testing before it happens is definitely a great thing. However, we may generate more BF, potentially duplicates of BF-26388.&lt;/p&gt;</comment>
                            <comment id="4893077" author="JIRAUSER1253424" created="Tue, 11 Oct 2022 03:48:42 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=etienne.petrel%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;etienne.petrel@mongodb.com&quot;&gt;etienne.petrel@mongodb.com&lt;/a&gt;, unfortunately we were not aware of BF-26388 or &lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt;. The revert and push were due to another bug that &lt;tt&gt;checkpoint_timestamp&lt;/tt&gt; in wiredtiger is not updated atomically along with the checkpoint operation itself. Do you think we should revert it again?&lt;/p&gt;</comment>
                            <comment id="4893006" author="JIRAUSER1258229" created="Tue, 11 Oct 2022 03:13:03 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=yuhong.zhang%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;yuhong.zhang@mongodb.com&quot;&gt;yuhong.zhang@mongodb.com&lt;/a&gt;, I would like to confirm something.&lt;br/&gt;
We have &lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt; open after this BF-26388 was created. It seems that we should fix &lt;a href=&quot;https://jira.mongodb.org/browse/WT-9877&quot; title=&quot;Fix assertion failure when evicting metadata page during checkpoint-cursor operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-9877&quot;&gt;&lt;del&gt;WT-9877&lt;/del&gt;&lt;/a&gt; before checkpoint cursors are used again.&lt;br/&gt;
However, I can see that &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt; was pushed, reverted and pushed. Is it safe or are we exposing ourselves to new occurrences of BF-26388?&lt;/p&gt;</comment>
                            <comment id="4884718" author="xgen-internal-githook" created="Thu, 6 Oct 2022 23:15:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;yuhong.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt; Switch background validation to use checkpoint cursors again&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9179d0a7109efb34631a6e19a87e055ed4e8c730&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9179d0a7109efb34631a6e19a87e055ed4e8c730&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4840098" author="xgen-internal-githook" created="Mon, 19 Sep 2022 22:26:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;yuhong.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt; Temporarily disable background validation to use checkpoint cursors&lt;/p&gt;

&lt;p&gt;Reverts the part of the implementation of the checkpoint cursors&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f5324f56bfd410822c1ddad76515fa4cc9ea21e0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f5324f56bfd410822c1ddad76515fa4cc9ea21e0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4806174" author="xgen-internal-githook" created="Tue, 6 Sep 2022 20:33:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yuhong Zhang&apos;, &apos;email&apos;: &apos;yuhong.zhang@mongodb.com&apos;, &apos;username&apos;: &apos;YuhongZhang98&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68689&quot; title=&quot;Switch background validation to use checkpoint cursors again&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68689&quot;&gt;&lt;del&gt;SERVER-68689&lt;/del&gt;&lt;/a&gt; Switch background validation to use checkpoint cursors again&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1a8f5ae47b2cd941b96cf8795fa45a167ac4fbeb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1a8f5ae47b2cd941b96cf8795fa45a167ac4fbeb&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2122088">SERVER-69135</issuekey>
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            <issuekey id="2123097">SERVER-69186</issuekey>
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            <issuekey id="2125680">SERVER-69247</issuekey>
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            <issuekey id="1166861">SERVER-46287</issuekey>
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