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    <title>MongoDB Jira</title>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-37191] Add support for write concerns for new $out modes.&#160;</title>
                <link>https://jira.mongodb.org/browse/SERVER-37191</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add support for write concerns for $out.&#160;&lt;/p&gt;

&lt;p&gt;aggregation/sources/out/use_cases.js had to be modified in order to pass&#160;aggregation_read_concern_majority_passthrough suites with exchange&lt;/p&gt;</description>
                <environment></environment>
        <key id="606701">SERVER-37191</key>
            <summary>Add support for write concerns for new $out modes.&#160;</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="ian.boros@mongodb.com">Ian Boros</assignee>
                                    <reporter username="martin.neupauer@mongodb.com">Martin Neupauer</reporter>
                        <labels>
                    </labels>
                <created>Tue, 18 Sep 2018 19:04:48 +0000</created>
                <updated>Sun, 29 Oct 2023 22:28:06 +0000</updated>
                            <resolved>Wed, 31 Oct 2018 17:23:35 +0000</resolved>
                                                    <fixVersion>4.1.5</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="2047747" author="xgen-internal-githook" created="Wed, 31 Oct 2018 17:23:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Nick Zolnierz&apos;, &apos;email&apos;: &apos;nicholas.zolnierz@mongodb.com&apos;, &apos;username&apos;: &apos;nzolnierzmdb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37191&quot; title=&quot;Add support for write concerns for new $out modes.&#160;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37191&quot;&gt;&lt;del&gt;SERVER-37191&lt;/del&gt;&lt;/a&gt; writeConcern for $out&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c9290364162cd76697ebee76c63ec148cd305101&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c9290364162cd76697ebee76c63ec148cd305101&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2031258" author="schwerin" created="Fri, 12 Oct 2018 14:16:39 +0000"  >&lt;p&gt;Have you talked to someone from the sharding team about this?&#160;I think this is OK, as long as you aren&apos;t counting on the retry happening at most once.&lt;/p&gt;</comment>
                            <comment id="2031237" author="nicholas.zolnierz" created="Fri, 12 Oct 2018 13:58:36 +0000"  >&lt;p&gt;I want to keep a paper trail of a couple of discussions regarding this ticket in case we need to revisit.&lt;/p&gt;

&lt;p&gt;1. Pass through the writeConcern from mongos for all shard pipelines that include $out&lt;br/&gt;
 2. Use the &quot;idempotent&quot; retry policy for $out writes, which is expected to retry if it encounters &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/client/remote_command_retry_scheduler.cpp#L103-L116&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;one of these errors&lt;/a&gt;. This includes writeConcern errors.&lt;br/&gt;
 3. If the retry fails for whatever reason (including WCE), throw an error and abort the entire $out operation.&lt;/p&gt;

&lt;p&gt;This is a bit different than my understanding after our in-person discussion, so I want to make sure we&apos;re all on the same page. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt;, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt; sound OK to you?&#160;&lt;/p&gt;

&lt;p&gt;CC &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=asya&quot; class=&quot;user-hover&quot; rel=&quot;asya&quot;&gt;asya&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=david.storch&quot; class=&quot;user-hover&quot; rel=&quot;david.storch&quot;&gt;david.storch&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2008386" author="david.storch" created="Wed, 19 Sep 2018 20:27:24 +0000"  >&lt;p&gt;As part of this work, we need to start propagating the $out&apos;s writeConcern when we dispatch exchange consumer pipelines.&lt;/p&gt;

&lt;p&gt;Additionally, we need to make the $out code respect a writeConcern when targeting writes to other shards. It would be unfortunate to wait for replication every time we spill(), so we will have to think about how to achieve this.&lt;/p&gt;</comment>
                    </comments>
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                                                                <inwardlinks description="is related to">
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            <issuekey id="1025073">SERVER-44827</issuekey>
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