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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-73599] Investigate (for WT) implications of opening a checkpoint cursor returns an error in MongoDB </title>
                <link>https://jira.mongodb.org/browse/SERVER-73599</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;An error will be returned when opening a checkpoint cursor if the timestamps of a file diverge after &lt;a href=&quot;https://jira.mongodb.org/browse/WT-10545&quot; title=&quot;Return an error when checkpoint cursor hangs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-10545&quot;&gt;&lt;del&gt;WT-10545&lt;/del&gt;&lt;/a&gt;. We will need to handle this changes in MongoDB, specifically, for background validation.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2252489">SERVER-73599</key>
            <summary>Investigate (for WT) implications of opening a checkpoint cursor returns an error in MongoDB </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>Fri, 3 Feb 2023 18:27:37 +0000</created>
                <updated>Sun, 29 Oct 2023 21:26:57 +0000</updated>
                            <resolved>Mon, 13 Mar 2023 14:31:24 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5276240" author="xgen-internal-githook" created="Thu, 16 Mar 2023 00:49:43 +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-73599&quot; title=&quot;Investigate (for WT) implications of opening a checkpoint cursor returns an error in MongoDB &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73599&quot;&gt;&lt;del&gt;SERVER-73599&lt;/del&gt;&lt;/a&gt; Only handle ENOENT error when not able to open a checkpoint cursor&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0c3c07d29e21a2ee16676b90d164060713818b4a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0c3c07d29e21a2ee16676b90d164060713818b4a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5276147" author="JIRAUSER1253424" created="Wed, 15 Mar 2023 23:23:02 +0000"  >&lt;p&gt;&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; pointed out that &lt;tt&gt;WT_NOTFOUND&lt;/tt&gt; error returned from the &lt;tt&gt;open_cursor()&lt;/tt&gt; call will be mapped to &lt;tt&gt;ENOENT&lt;/tt&gt;. Will push another commit to remove the extra error code handling.&lt;/p&gt;</comment>
                            <comment id="5264325" author="xgen-internal-githook" created="Fri, 10 Mar 2023 16:37:18 +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-73599&quot; title=&quot;Investigate (for WT) implications of opening a checkpoint cursor returns an error in MongoDB &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73599&quot;&gt;&lt;del&gt;SERVER-73599&lt;/del&gt;&lt;/a&gt; Skip individually checkpointed indexes during background validation&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/58c32fd14692dde8c778f3c77cd530c85b54bc76&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/58c32fd14692dde8c778f3c77cd530c85b54bc76&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5254337" author="JIRAUSER1258229" created="Tue, 7 Mar 2023 04:50:36 +0000"  >&lt;p&gt;&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;, we changed the purpose of &lt;a href=&quot;https://jira.mongodb.org/browse/WT-10545&quot; title=&quot;Return an error when checkpoint cursor hangs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-10545&quot;&gt;&lt;del&gt;WT-10545&lt;/del&gt;&lt;/a&gt;; WiredTiger now returns an error if a checkpoint cursor cannot be opened in a specific scenario that involves bulk operations. We should re open this ticket to make sure the server can deal with this new error.&lt;/p&gt;

&lt;p&gt;The new ticket &lt;a href=&quot;https://jira.mongodb.org/browse/WT-10715&quot; title=&quot;Automatically try previous checkpoints when opening a checkpoint cursor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-10715&quot;&gt;WT-10715&lt;/a&gt; will implement the solution where WiredTiger should open previous checkpoints if needed. &lt;/p&gt;</comment>
                            <comment id="5242400" author="JIRAUSER1253424" created="Thu, 2 Mar 2023 00:44:44 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/WT-10545&quot; title=&quot;Return an error when checkpoint cursor hangs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-10545&quot;&gt;&lt;del&gt;WT-10545&lt;/del&gt;&lt;/a&gt; decided to open the cursor on the previous checkpoint if there&apos;s a mismatch between table&apos;s time and global time. The fix will ensure validation for all tables to run on the same checkpoint.&#160;&lt;/p&gt;</comment>
                            <comment id="5207619" author="JIRAUSER1253424" created="Fri, 17 Feb 2023 14:30:30 +0000"  >&lt;p&gt;Yes, we can move on to unblock the checkpoint thread and return a message to the user about the table not being validated.&lt;/p&gt;</comment>
                            <comment id="5206595" author="JIRAUSER1258229" created="Fri, 17 Feb 2023 03:45:55 +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;, if the checkpoint cursor cannot be opened due to the reason described in BF-27521/&lt;a href=&quot;https://jira.mongodb.org/browse/WT-10545&quot; title=&quot;Return an error when checkpoint cursor hangs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-10545&quot;&gt;&lt;del&gt;WT-10545&lt;/del&gt;&lt;/a&gt;, we may want to return EBUSY.&lt;/p&gt;

&lt;p&gt;On your side, if my understanding is correct, the checkpoint thread is blocked when you are performing validation. This means you will need to skip validation and let the checkpoint thread do a checkpoint before being able to run validation.&lt;/p&gt;

&lt;p&gt;This is just theoretical for now but would that work?&lt;/p&gt;

&lt;p&gt;cc: &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=clarisse.cheah%40mongodb.com&quot; class=&quot;user-hover&quot; rel=&quot;clarisse.cheah@mongodb.com&quot;&gt;clarisse.cheah@mongodb.com&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2245063">WT-10545</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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            <issuekey id="2279036">SERVER-74529</issuekey>
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