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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-40069] GlobalLockAcquisitionTracker::getGlobalWriteLocked should return true if the OperationContext it decorates ever held a global write lock</title>
                <link>https://jira.mongodb.org/browse/SERVER-40069</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This would ensure two things that are not true today:&lt;/p&gt;

&lt;p&gt;1) A command that unstashed locks held by a transaction waits for writeConcern of the system last OpTime. Today, because the locks are stashed before waiting for writeConcern, the command may end up waiting for an OpTime in a previous term.&lt;/p&gt;

&lt;p&gt;2) Stepdown will kill a command that is waiting for writeConcern after having unstashed and stashed a transaction&apos;s locks. The command may be waiting for writeConcern even though it did not do a write, because its Client&apos;s last OpTime was set to the system last OpTime.&lt;/p&gt;</description>
                <environment></environment>
        <key id="714605">SERVER-40069</key>
            <summary>GlobalLockAcquisitionTracker::getGlobalWriteLocked should return true if the OperationContext it decorates ever held a global write lock</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="judah.schvimer@mongodb.com">Judah Schvimer</assignee>
                                    <reporter username="esha.maharishi@mongodb.com">Esha Maharishi</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Mar 2019 15:22:28 +0000</created>
                <updated>Sun, 29 Oct 2023 22:23:04 +0000</updated>
                            <resolved>Wed, 17 Apr 2019 18:54:28 +0000</resolved>
                                                    <fixVersion>4.1.11</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2216863" author="xgen-internal-githook" created="Wed, 17 Apr 2019 18:30:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Judah Schvimer&apos;, &apos;username&apos;: &apos;judahschvimer&apos;, &apos;email&apos;: &apos;judah@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40069&quot; title=&quot;GlobalLockAcquisitionTracker::getGlobalWriteLocked should return true if the OperationContext it decorates ever held a global write lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40069&quot;&gt;&lt;del&gt;SERVER-40069&lt;/del&gt;&lt;/a&gt; Fix global lock tracking for txns&lt;/p&gt;

&lt;p&gt;Includes &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40084&quot; title=&quot;Prevent readers from reading garbage/stale value from global_lock_acquisition_tracker.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40084&quot;&gt;&lt;del&gt;SERVER-40084&lt;/del&gt;&lt;/a&gt;, stores global lock acquisition flag in an&lt;br/&gt;
atomic.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7a9f240519c55cc6af45e4783bfd54d81a79d1e0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7a9f240519c55cc6af45e4783bfd54d81a79d1e0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2196162" author="xgen-internal-githook" created="Fri, 29 Mar 2019 16:25:18 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;name&apos;: &apos;Benety Goh&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40069&quot; title=&quot;GlobalLockAcquisitionTracker::getGlobalWriteLocked should return true if the OperationContext it decorates ever held a global write lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40069&quot;&gt;&lt;del&gt;SERVER-40069&lt;/del&gt;&lt;/a&gt; Fix global lock tracking for txns&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit d99db775dbf73e27bd20e402f26f068dc199203d.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/46d303c2de5529d3158f1fe0afc5bbeef6444dac&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/46d303c2de5529d3158f1fe0afc5bbeef6444dac&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2194734" author="xgen-internal-githook" created="Thu, 28 Mar 2019 15:48:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;jesse@mongodb.com&apos;, &apos;name&apos;: &apos;A. Jesse Jiryu Davis&apos;, &apos;username&apos;: &apos;ajdavis&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40069&quot; title=&quot;GlobalLockAcquisitionTracker::getGlobalWriteLocked should return true if the OperationContext it decorates ever held a global write lock&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40069&quot;&gt;&lt;del&gt;SERVER-40069&lt;/del&gt;&lt;/a&gt; Fix global lock tracking for txns&lt;/p&gt;

&lt;p&gt;Includes &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40084&quot; title=&quot;Prevent readers from reading garbage/stale value from global_lock_acquisition_tracker.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40084&quot;&gt;&lt;del&gt;SERVER-40084&lt;/del&gt;&lt;/a&gt;, stores global lock acquisition flags in an&lt;br/&gt;
atomic.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d99db775dbf73e27bd20e402f26f068dc199203d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d99db775dbf73e27bd20e402f26f068dc199203d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2177791" author="siyuan.zhou@10gen.com" created="Mon, 11 Mar 2019 21:58:34 +0000"  >&lt;p&gt;To give more context, the first point &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=esha.maharishi&quot; class=&quot;user-hover&quot; rel=&quot;esha.maharishi&quot;&gt;esha.maharishi&lt;/a&gt; mentioned is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/22e1ef5134181dd9f58e8408e04744f205d7b41d/src/mongo/db/service_entry_point_mongod.cpp#L103-L107&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the problem here&lt;/a&gt;. The fundamental problem is with locker stash / unstash, GlobalLockAcquisitionTracker doesn&apos;t accurately indicate whether this operation context &lt;b&gt;could have done any writes&lt;/b&gt;. Imagine the first opCtx does a write and stashes a WUOW, then the second opCtx commits a WUOW but doesn&apos;t write oplog entries or anything else, &lt;tt&gt;GlobalLockAcquisitionTracker&lt;/tt&gt; for the second opCtx will be wrong.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="711063">SERVER-39991</issuekey>
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