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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-74519] The SamplingBasedSplitPolicyTest test writes to /data/db/tmp unconditionally</title>
                <link>https://jira.mongodb.org/browse/SERVER-74519</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;My workstation&apos;s &lt;tt&gt;/&lt;/tt&gt; drive has very little space so I run resmoke with &lt;tt&gt;--dbpathPrefix $HOME/Temp/Data/resmoke&lt;/tt&gt;.&lt;br/&gt;
However, the &lt;tt&gt;SamplingSucceedsWithLimitedMemoryForSortOperation&lt;/tt&gt; unit-test reliably fails because it is trying to use &lt;tt&gt;/data/db/tmp&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;This test should obey the root of the testing hierarchy.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2278802">SERVER-74519</key>
            <summary>The SamplingBasedSplitPolicyTest test writes to /data/db/tmp unconditionally</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="cheahuychou.mao@mongodb.com">Cheahuychou Mao</assignee>
                                    <reporter username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</reporter>
                        <labels>
                            <label>new-eng</label>
                            <label>sharding-nyc-subteam3</label>
                    </labels>
                <created>Wed, 1 Mar 2023 20:22:17 +0000</created>
                <updated>Sun, 29 Oct 2023 21:25:28 +0000</updated>
                            <resolved>Wed, 10 May 2023 04:18:37 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                    <fixVersion>7.0.0-rc1</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5415603" author="xgen-internal-githook" created="Wed, 10 May 2023 18:25:41 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Cheahuychou Mao&apos;, &apos;email&apos;: &apos;mao.cheahuychou@gmail.com&apos;, &apos;username&apos;: &apos;cheahuychou&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74519&quot; title=&quot;The SamplingBasedSplitPolicyTest test writes to /data/db/tmp unconditionally&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74519&quot;&gt;&lt;del&gt;SERVER-74519&lt;/del&gt;&lt;/a&gt; Make ShardingTestFixtureCommon use unittest::TempDir for dbpath&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 380259f880032aa15fe999d7ec812b0ce9d72b16)&lt;br/&gt;
Branch: v7.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e9ff37f8765dd5bda9484ab7e4ef77fbd80694d5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e9ff37f8765dd5bda9484ab7e4ef77fbd80694d5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5413386" author="xgen-internal-githook" created="Wed, 10 May 2023 02:46:49 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Cheahuychou Mao&apos;, &apos;email&apos;: &apos;mao.cheahuychou@gmail.com&apos;, &apos;username&apos;: &apos;cheahuychou&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74519&quot; title=&quot;The SamplingBasedSplitPolicyTest test writes to /data/db/tmp unconditionally&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74519&quot;&gt;&lt;del&gt;SERVER-74519&lt;/del&gt;&lt;/a&gt; Make ShardingTestFixtureCommon use unittest::TempDir for dbpath&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/380259f880032aa15fe999d7ec812b0ce9d72b16&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/380259f880032aa15fe999d7ec812b0ce9d72b16&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5242275" author="max.hirschhorn@10gen.com" created="Wed, 1 Mar 2023 23:41:50 +0000"  >&lt;p&gt;SamplingBasedSplitPolicyTest is a test case which was written as part of resharding. Arguably the initial split of resharding is owned by Sharding EMEA (see &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68050&quot; title=&quot;Change resharding split policy to create one chunk per shard by default&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68050&quot;&gt;SERVER-68050&lt;/a&gt;) but I feel like this one would be fine for NYC to do.&lt;/p&gt;

&lt;p&gt;I feel like there is some confusion because C++ tests do not accept a &amp;#45;&amp;#45;dbpath argument like mongod or dbtest do. The mongo::unittest::TempDir class used for C++ tests is configured through TMPDIR, TMP, TEMP, or TEMPDIR, and falling back to /tmp. However there is a problem where the SamplingBasedSplitPolicyTest fixture derives from ShardedAggTestFixture which derives CatalogCacheTestFixture, etc. which &lt;b&gt;not&lt;/b&gt; derive from ServiceContextMongoDTest and therefore doesn&apos;t &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d829869b0e0d2fa17e752df4de64f025ae3d9cf1/src/mongo/db/service_context_d_test_fixture.cpp#L133&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;assign storageGlobalParams.dbpath to a temporary directory&lt;/a&gt;. The SamplingSucceedsWithLimitedMemoryForSortOperation test case when it runs under the SamplingBasedSplitPolicyTest fixture &lt;a href=&quot;https://github.com/mongodb/mongo/blob/d829869b0e0d2fa17e752df4de64f025ae3d9cf1/src/mongo/db/s/config/initial_split_policy.cpp#L844&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;spills to /data/data/tmp&lt;/a&gt; due to storageGlobalParams.dbpath being left as its production default value.&lt;/p&gt;

&lt;p&gt;Tangentially related, a &lt;tt&gt;git grep &apos;storageGlobalParams.dbpath +&apos;&lt;/tt&gt; suggests SamplingBasedSplitPolicy::&amp;#95;makePipelineDocumentSource() should maybe be spilling to an &amp;#95;tmp/ directory (underscore prefix) within the dbpath for consistency.&lt;/p&gt;</comment>
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                            <customfieldvalue>&lt;p&gt;Ensure that &lt;tt&gt;/data&lt;/tt&gt; doesn&apos;t exist.&lt;/p&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mkdir --parents $HOME/Temp/Data/resmoke&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;python3.10 ./build/install/bin/resmoke.py run \&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;  --mrlog \&lt;/span&gt;&lt;/pre&gt;
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