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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>[GODRIVER-1615] SingleConnectionDeployment should not be used for application operations</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-1615</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>&lt;p&gt;The SingleConnectionDeployment has two problems:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;It doesn&apos;t implement ErrorProcessor, so application errors aren&apos;t handled per the SDAM error handling spec. SingleServerDeployment probably has the same issue.&lt;/li&gt;
	&lt;li&gt;It wraps connections in &lt;tt&gt;nopCloserConnection&lt;/tt&gt;, which prevents any interfaces they implemented like &lt;tt&gt;Compressor&lt;/tt&gt; from being used.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Change streams use these deployment types, so they should be changed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1348883">GODRIVER-1615</key>
            <summary>SingleConnectionDeployment should not be used for application operations</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="divjot.arora@mongodb.com">Divjot Arora</assignee>
                                    <reporter username="divjot.arora@mongodb.com">Divjot Arora</reporter>
                        <labels>
                    </labels>
                <created>Tue, 12 May 2020 20:42:20 +0000</created>
                <updated>Sat, 28 Oct 2023 11:38:11 +0000</updated>
                            <resolved>Wed, 3 Jun 2020 13:58:05 +0000</resolved>
                                                    <fixVersion>1.3.4</fixVersion>
                                    <component>CRUD</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3187669" author="xgen-internal-githook" created="Wed, 3 Jun 2020 15:26:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Divjot Arora&apos;, &apos;email&apos;: &apos;divjot.arora@10gen.com&apos;, &apos;username&apos;: &apos;divjotarora&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-1615&quot; title=&quot;SingleConnectionDeployment should not be used for application operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-1615&quot;&gt;&lt;del&gt;GODRIVER-1615&lt;/del&gt;&lt;/a&gt; Track wire version on ChangeStream&lt;/p&gt;

&lt;p&gt;This was needed to fix test errors. Because the deployment was changed&lt;br/&gt;
and the new deployment closes the connection right after the aggregate,&lt;br/&gt;
any code that access the wire version after the aggregate finishes would&lt;br/&gt;
panic. To fix that, we store the wire version of the last used connection&lt;br/&gt;
on ChangeStream.&lt;br/&gt;
Branch: release/1.3&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/630989b0608d06a1362d3f6ef0f4811aec55e00e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/630989b0608d06a1362d3f6ef0f4811aec55e00e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3187660" author="xgen-internal-githook" created="Wed, 3 Jun 2020 15:23:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Divjot Arora&apos;, &apos;email&apos;: &apos;divjot.arora@10gen.com&apos;, &apos;username&apos;: &apos;divjotarora&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-1615&quot; title=&quot;SingleConnectionDeployment should not be used for application operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-1615&quot;&gt;&lt;del&gt;GODRIVER-1615&lt;/del&gt;&lt;/a&gt; Track wire version on ChangeStream&lt;/p&gt;

&lt;p&gt;This was needed to fix test errors. Because the deployment was changed&lt;br/&gt;
and the new deployment closes the connection right after the aggregate,&lt;br/&gt;
any code that access the wire version after the aggregate finishes would&lt;br/&gt;
panic. To fix that, we store the wire version of the last used connection&lt;br/&gt;
on ChangeStream.&lt;br/&gt;
Branch: release/1.3&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/630989b0608d06a1362d3f6ef0f4811aec55e00e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/630989b0608d06a1362d3f6ef0f4811aec55e00e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3187064" author="xgen-internal-githook" created="Wed, 3 Jun 2020 13:57:30 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Divjot Arora&apos;, &apos;email&apos;: &apos;divjot.arora@10gen.com&apos;, &apos;username&apos;: &apos;divjotarora&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-1615&quot; title=&quot;SingleConnectionDeployment should not be used for application operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-1615&quot;&gt;&lt;del&gt;GODRIVER-1615&lt;/del&gt;&lt;/a&gt; Use custom deployment for change streams (#411)&lt;br/&gt;
Branch: release/1.3&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/012750a59251839a3098a9384efb9c252127f660&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/012750a59251839a3098a9384efb9c252127f660&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3187058" author="xgen-internal-githook" created="Wed, 3 Jun 2020 13:56:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Divjot Arora&apos;, &apos;email&apos;: &apos;divjot.arora@10gen.com&apos;, &apos;username&apos;: &apos;divjotarora&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-1615&quot; title=&quot;SingleConnectionDeployment should not be used for application operations&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-1615&quot;&gt;&lt;del&gt;GODRIVER-1615&lt;/del&gt;&lt;/a&gt; Use custom deployment for change streams (#411)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/commit/ed2bb9904250129a51d8b98643ceabfc417983af&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/commit/ed2bb9904250129a51d8b98643ceabfc417983af&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3111754" author="divjot.arora" created="Tue, 26 May 2020 21:18:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo-go-driver/pull/411&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-go-driver/pull/411&lt;/a&gt;&lt;/p&gt;</comment>
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