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    <title>MongoDB Jira</title>
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    <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-61520] Unable to get change stream data when using hasNext()</title>
                <link>https://jira.mongodb.org/browse/SERVER-61520</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We set the oplog space size to 50GB, and our data size is about 9000W. We keep the resumeToken in memory, we also use hasNext() and next() to get the change stream data. When a large amount of data is updated, it blocks in the hasNext() method and cannot return true or false, so next() could not execute. But when mongo client is restarted, hasNext() will not block with the same resumeToken. Why are we blocking in the hasNext() method?&lt;/p&gt;</description>
                <environment></environment>
        <key id="1926097">SERVER-61520</key>
            <summary>Unable to get change stream data when using hasNext()</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="9">Done</resolution>
                                        <assignee username="eric.sedor@mongodb.com">Eric Sedor</assignee>
                                    <reporter username="che302@qq.com">chen liang</reporter>
                        <labels>
                            <label>changestreams</label>
                    </labels>
                <created>Tue, 16 Nov 2021 04:42:24 +0000</created>
                <updated>Mon, 31 Jan 2022 21:12:23 +0000</updated>
                            <resolved>Mon, 31 Jan 2022 21:12:23 +0000</resolved>
                                    <version>4.2.12</version>
                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4241303" author="eric.sedor" created="Fri, 10 Dec 2021 17:04:29 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=che302%40qq.com&quot; class=&quot;user-hover&quot; rel=&quot;che302@qq.com&quot;&gt;che302@qq.com&lt;/a&gt;, for this issue we&apos;d like to encourage you to start by asking our community for help by posting on the &lt;a href=&quot;https://community.mongodb.com&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MongoDB Developer Community Forums&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;If the discussion there leads you to suspect a bug in the MongoDB server, then we&apos;d want to investigate it as a possible bug here in the SERVER project.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
Eric&lt;/p&gt;</comment>
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                            <attachment id="345848" name="mongo_code.png" size="57491" author="che302@qq.com" created="Tue, 16 Nov 2021 04:51:38 +0000"/>
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