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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-21881] dbhash checking in FSM framework doesn&apos;t handle TTL deletes</title>
                <link>https://jira.mongodb.org/browse/SERVER-21881</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It&apos;s possible for the dbhash checking in the FSM framweork to race with the TTL monitor on a replica set node, which could result in spurious failures.&lt;/p&gt;</description>
                <environment></environment>
        <key id="243675">SERVER-21881</key>
            <summary>dbhash checking in FSM framework doesn&apos;t handle TTL deletes</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="9">Done</resolution>
                                        <assignee username="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="max.hirschhorn@mongodb.com">Max Hirschhorn</reporter>
                        <labels>
                            <label>test-only</label>
                    </labels>
                <created>Sun, 13 Dec 2015 21:08:57 +0000</created>
                <updated>Mon, 21 Nov 2016 19:54:56 +0000</updated>
                            <resolved>Tue, 9 Feb 2016 15:08:45 +0000</resolved>
                                    <version>3.2.0</version>
                                    <fixVersion>3.2.4</fixVersion>
                    <fixVersion>3.3.2</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1179830" author="xgen-internal-githook" created="Sat, 20 Feb 2016 21:06:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21881&quot; title=&quot;dbhash checking in FSM framework doesn&amp;#39;t handle TTL deletes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21881&quot;&gt;&lt;del&gt;SERVER-21881&lt;/del&gt;&lt;/a&gt; Use fsync+lock when checking dbhash in concurrency suite.&lt;/p&gt;

&lt;p&gt;The fsync+lock operation prevents the TTL monitor from running on the&lt;br/&gt;
primary after awaiting replication and before getting the dbhashes from&lt;br/&gt;
all the nodes in the replica set. Otherwise, a primary&apos;s dbhash can&lt;br/&gt;
reflect a delete operation that hasn&apos;t yet replicated to all of the&lt;br/&gt;
secondaries, leading to a spurious dbhash mismatch.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 41f296cdc37f92f8de0ea3d17109693c4f0befb6)&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/86884b98e44f4a77f5b66970a6138874f2b98cf3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/86884b98e44f4a77f5b66970a6138874f2b98cf3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1167830" author="xgen-internal-githook" created="Tue, 9 Feb 2016 15:06:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21881&quot; title=&quot;dbhash checking in FSM framework doesn&amp;#39;t handle TTL deletes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21881&quot;&gt;&lt;del&gt;SERVER-21881&lt;/del&gt;&lt;/a&gt; Re-enable the indexed_insert_ttl.js FSM workload.&lt;/p&gt;

&lt;p&gt;This reverts commit b06952729f5388419f1688e152273b9bb2910739.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5d4f65ced468140ac3c67878f385c6b6bc52167d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5d4f65ced468140ac3c67878f385c6b6bc52167d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1167829" author="xgen-internal-githook" created="Tue, 9 Feb 2016 15:06:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21881&quot; title=&quot;dbhash checking in FSM framework doesn&amp;#39;t handle TTL deletes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21881&quot;&gt;&lt;del&gt;SERVER-21881&lt;/del&gt;&lt;/a&gt; Use fsync+lock when checking dbhash in concurrency suite.&lt;/p&gt;

&lt;p&gt;The fsync+lock operation prevents the TTL monitor from running on the&lt;br/&gt;
primary after awaiting replication and before getting the dbhashes from&lt;br/&gt;
all the nodes in the replica set. Otherwise, a primary&apos;s dbhash can&lt;br/&gt;
reflect a delete operation that hasn&apos;t yet replicated to all of the&lt;br/&gt;
secondaries, leading to a spurious dbhash mismatch.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/41f296cdc37f92f8de0ea3d17109693c4f0befb6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/41f296cdc37f92f8de0ea3d17109693c4f0befb6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1127442" author="xgen-internal-githook" created="Wed, 6 Jan 2016 14:14:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-21881&quot; title=&quot;dbhash checking in FSM framework doesn&amp;#39;t handle TTL deletes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-21881&quot;&gt;&lt;del&gt;SERVER-21881&lt;/del&gt;&lt;/a&gt; Temporarily disable the indexed_insert_ttl.js FSM workload.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b06952729f5388419f1688e152273b9bb2910739&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b06952729f5388419f1688e152273b9bb2910739&lt;/a&gt;&lt;/p&gt;</comment>
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                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="238956">SERVER-21419</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="242958">SERVER-21809</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="243596">SERVER-21876</issuekey>
        </issuelink>
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