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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-49415] create_new_indexes_with_conflict.js hangs intermittently due to unreliable log line checking</title>
                <link>https://jira.mongodb.org/browse/SERVER-49415</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;TLDR: MODE_X collection access in IndexBuildsCoordinator::_filterSpecsAndRegisterBuild() is not compatible with second test case; and fix log message detection in test.&lt;/p&gt;

&lt;p&gt;create_new_indexes_with_conflict.js runs two test cases using the same test function runConflictingCollectionCreate(). During the second test run, the test function may &lt;a href=&quot;https://github.com/mongodb/mongo/blob/816ba22112096f783ecbfd1f76b386942d5d9ee7/jstests/noPassthroughWithMongod/create_new_indexes_with_conflict.js#L66&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;erroneously detect the log message&lt;/a&gt; from the first test run.&lt;/p&gt;

&lt;p&gt;This issue may be resolved by using checkLog.containsWithCount() rather than checkLog.contains(); or by splitting up the test into two separate JS files. However, fixing the test itself exposes an issue with the second test case which runs an index build on an existing collection - the second test case will hang due to an exclusive lock in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/816ba22112096f783ecbfd1f76b386942d5d9ee7/src/mongo/db/index_builds_coordinator.cpp#L1637&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;IndexBuildsCoordinator::_filterSpecsAndRegisterBuild()&lt;/a&gt; that conflicts with the fail point in create_indexes.cpp.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1405625">SERVER-49415</key>
            <summary>create_new_indexes_with_conflict.js hangs intermittently due to unreliable log line checking</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="13201">Fixed</resolution>
                                        <assignee username="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Jul 2020 23:06:29 +0000</created>
                <updated>Sun, 29 Oct 2023 22:05:58 +0000</updated>
                            <resolved>Fri, 24 Jul 2020 10:12:52 +0000</resolved>
                                                    <fixVersion>4.4.1</fixVersion>
                    <fixVersion>4.7.0</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="3319616" author="xgen-internal-githook" created="Tue, 4 Aug 2020 15:21:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49415&quot; title=&quot;create_new_indexes_with_conflict.js hangs intermittently due to unreliable log line checking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49415&quot;&gt;&lt;del&gt;SERVER-49415&lt;/del&gt;&lt;/a&gt; remove test case with conflicting index build&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 78cc027285359cc21c55f2dac69ce41cb9f23959)&lt;br/&gt;
Branch: v4.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/10976e18844d3a80b3567765ed06c30f63efbccd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/10976e18844d3a80b3567765ed06c30f63efbccd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3300151" author="xgen-internal-githook" created="Fri, 24 Jul 2020 10:06:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Benety Goh&apos;, &apos;email&apos;: &apos;benety@mongodb.com&apos;, &apos;username&apos;: &apos;benety&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49415&quot; title=&quot;create_new_indexes_with_conflict.js hangs intermittently due to unreliable log line checking&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49415&quot;&gt;&lt;del&gt;SERVER-49415&lt;/del&gt;&lt;/a&gt; remove test case with conflicting index build&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/78cc027285359cc21c55f2dac69ce41cb9f23959&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/78cc027285359cc21c55f2dac69ce41cb9f23959&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3278830" author="benety.goh" created="Fri, 10 Jul 2020 01:33:43 +0000"  >&lt;p&gt;We should also consider removing the creatingConflictingIndex=true test case if the exclusive lock is necessary for the _filterSpecsAndRegisterBuild()&apos;s operation.&lt;/p&gt;</comment>
                            <comment id="3278701" author="benety.goh" created="Thu, 9 Jul 2020 23:07:14 +0000"  >&lt;p&gt;This test was introduced in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44405&quot; title=&quot;Use MODE_IX lock for implicit collection creation with createIndexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44405&quot;&gt;&lt;del&gt;SERVER-44405&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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            <issuekey id="1418344">SERVER-49837</issuekey>
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