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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>
    </build-info>


<item>
            <title>[KAFKA-295] MongoDB source connector: Issue when running connector for a deployment level</title>
                <link>https://jira.mongodb.org/browse/KAFKA-295</link>
                <project id="16285" key="KAFKA">Kafka Connector</project>
                    <description>&lt;p&gt;Setup:&lt;br/&gt;
MongoDB source connector v 1.5.1&lt;br/&gt;
Sharded cluster v4.2&lt;/p&gt;

&lt;p&gt;We are running connector on deployment and listening to certain collections with the match command. The load we are seeing from the collections is very low.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;
&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: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;pipeline&quot;&lt;/span&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;: &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;[ { $project: { \&quot;updateDescription\&quot;:0 }}, { $match: { \&quot;ns.coll\&quot;: { \&quot;$in\&quot;: [\&quot;coll1\&quot; ,\&quot;coll2\&quot;, \&quot;coll3\&quot;, \&quot;coll4\&quot; ] } } } ]&quot;&lt;/span&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;,&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;We are seeing the resume change stream issue once every 2 days (which matches the oplog window/limit we have)&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 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;An exception occurred when trying to get the next item from the Change Stream: Query failed with error code &lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;286&lt;/span&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; and error message &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&apos;Error on remote shard server_name:27018 :: caused by :: Resume of change stream was not possible, as the resume point may no longer be in the oplog.&apos;&lt;/span&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; on server server_name:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;27017&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;We have experience running connectors targeted against specific collections handling high volume but have not seen the issue. But this is the connector we are running&lt;br/&gt;
against a deployment. Are we missing any configuration on the connector/cluster?&lt;/p&gt;

&lt;p&gt;P.S: We also looked into some docs and are testing the connector with heartbeat.interval.ms configuration since we assume that this may be due to infrequently updated namespaces.&lt;/p&gt;

&lt;p&gt;Are we missing any specific configuration on connector/cluster?&#160; Thanks in advance.&lt;/p&gt;



&lt;p&gt;namespaces &lt;a href=&quot;https://docs.mongodb.com/kafka-connector/current/troubleshooting/recover-from-invalid-resume-token/#std-label-kafka-troubleshoot-invalid-resume-token&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/kafka-connector/current/troubleshooting/recover-from-invalid-resume-token/#std-label-kafka-troubleshoot-invalid-resume-token&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1988916">KAFKA-295</key>
            <summary>MongoDB source connector: Issue when running connector for a deployment level</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="13203">Gone away</resolution>
                                        <assignee username="robert.walters@mongodb.com">Robert Walters</assignee>
                                    <reporter username="sabari.mgn@gmail.com">Sabari Gandhi</reporter>
                        <labels>
                            <label>external-user</label>
                    </labels>
                <created>Wed, 23 Feb 2022 18:39:38 +0000</created>
                <updated>Fri, 27 Oct 2023 19:45:05 +0000</updated>
                            <resolved>Wed, 23 Mar 2022 12:00:41 +0000</resolved>
                                    <version>1.5.1</version>
                                                    <component>Source</component>
                                        <votes>1</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4429117" author="dbeng-pm-bot" created="Wed, 23 Mar 2022 12:00:42 +0000"  >&lt;p&gt;There hasn&apos;t been any recent activity on this ticket, so we&apos;re resolving it. Thanks for reaching out! Please feel free to comment on this if you&apos;re able to provide more information.&lt;/p&gt;</comment>
                            <comment id="4397604" author="sabari.mgn@gmail.com" created="Tue, 8 Mar 2022 13:01:20 +0000"  >&lt;p&gt;Thanks, @Robert for the response. We have an oplog window for about 48 hours.&lt;/p&gt;

&lt;p&gt;We&apos;ve also been testing out the heartbeat feature in the connector to see if that fixes the issue. Please see below the understanding we have on that:&lt;/p&gt;

&lt;p&gt;As mentioned earlier, we have the connector configuration at the &lt;b&gt;deployment&lt;/b&gt; level (across databases) and we filter the collection using match configuration&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;


&lt;p&gt; In this setup even with heartbeat enabled we are getting the same error. Based on documentation &quot;The connector sends heartbeat messages when source records are not published in the specified interval.&quot; So in this setup let&apos;s say one collection receives change event at regular intervals in this scenario heartbeat will not happen and eventually, when oplog rollover happens it will not have the resumetoken for the collection with little activity. Can you please confirm if this understanding is right?&lt;/p&gt;

&lt;p&gt;Also,&#160;does heartbeat implementation is supported at the deployment level for the source connector? Most of the documentation mentions heartbeat implementation at the namespace level.&#160;&lt;/p&gt;</comment>
                            <comment id="4380261" author="robert.walters" created="Mon, 28 Feb 2022 14:23:07 +0000"  >&lt;p&gt;it sounds like the oplog is rolling over so when the change stream event happens the id is not found , you could try increasing the size of the oplog.&lt;/p&gt;</comment>
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