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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>[JAVA-1973] AbstractSubscription implementations need to track completed</title>
                <link>https://jira.mongodb.org/browse/JAVA-1973</link>
                <project id="10006" key="JAVA">Java Driver</project>
                    <description>&lt;p&gt;As multiple requests for data can occur before data is available, then implementations of &lt;tt&gt;AbstractSubscription&lt;/tt&gt; must handle when the &lt;tt&gt;Subscriptions&lt;/tt&gt; completed state.&lt;/p&gt;

&lt;p&gt;Currently, &lt;tt&gt;completed&lt;/tt&gt; defaults to true - so  there is a race condition on multiple calls to &lt;tt&gt;request&lt;/tt&gt; between the requesting initial data and then the processing of results that looks at the &lt;tt&gt;completed&lt;/tt&gt; state.  If results haven&apos;t come in it shortcuts to calling &lt;tt&gt;onComplete&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="230649">JAVA-1973</key>
            <summary>AbstractSubscription implementations need to track completed</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="ross@mongodb.com">Ross Lawley</assignee>
                                    <reporter username="ross@mongodb.com">Ross Lawley</reporter>
                        <labels>
                    </labels>
                <created>Mon, 21 Sep 2015 10:58:41 +0000</created>
                <updated>Wed, 7 Oct 2015 13:01:04 +0000</updated>
                            <resolved>Mon, 21 Sep 2015 14:34:38 +0000</resolved>
                                    <version>3.0.4</version>
                                    <fixVersion>3.1.0</fixVersion>
                                    <component>Async</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1053721" author="jeff.yemin" created="Wed, 7 Oct 2015 13:01:04 +0000"  >&lt;p&gt;Released in &lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/releases/tag/r3.1.0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;3.1.0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1038314" author="xgen-internal-githook" created="Mon, 21 Sep 2015 14:33:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;rozza&apos;, u&apos;name&apos;: u&apos;Ross Lawley&apos;, u&apos;email&apos;: u&apos;ross.lawley@gmail.com&apos;}
&lt;p&gt;Message: Made checkCompleted abstract in AbstractSubscriptions&lt;/p&gt;

&lt;p&gt;There is no guarantee that there would be single calls to request before data arrives.&lt;br/&gt;
Therefore checkCompleted should not default to true.&lt;/p&gt;

&lt;p&gt;Tracking completed state fixes a potential race conditions for Subscriptions to SingleResultCallbacks.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/JAVA-1973&quot; title=&quot;AbstractSubscription implementations need to track completed&quot; class=&quot;issue-link&quot; data-issue-key=&quot;JAVA-1973&quot;&gt;&lt;del&gt;JAVA-1973&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-java-driver/commit/2dacec65297753d8017cfc4f54dcaaa79ba35404&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-java-driver/commit/2dacec65297753d8017cfc4f54dcaaa79ba35404&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="226738">JAVA-1931</issuekey>
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