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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>[KAFKA-141] Mongo Source Connector seeks non-existing topic</title>
                <link>https://jira.mongodb.org/browse/KAFKA-141</link>
                <project id="16285" key="KAFKA">Kafka Connector</project>
                    <description>&lt;p&gt;A general outline of this issue has been posted on stackoverflow.&lt;br/&gt;
&lt;a href=&quot;https://stackoverflow.com/questions/62441841/topic-mapping-error-kafka-connect-mongo-source-connector&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://stackoverflow.com/questions/62441841/topic-mapping-error-kafka-connect-mongo-source-connector&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;In a nutshell, the Kafka producer that underlies the MongoDB Source Connector sometimes points to the wrong (and thus non-existing) topic. The database name - that is by definition part of the topic name - is prefixed by an inexplicable number.&#160;&lt;/p&gt;

&lt;p&gt;This happens during the deployment of the Mongo Source Connector, but it also popped-up during the restart of one of our Kafka Connect nodes.&lt;/p&gt;

&lt;p&gt;Please find the logs (nothing is logged on DEBUG level) and our connector configuration attached.&lt;/p&gt;

&lt;p&gt;Note that by changing the name of the connector the bug eventually does not occur. This flaky behavior is a blocker for us to go to production.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1437648">KAFKA-141</key>
            <summary>Mongo Source Connector seeks non-existing topic</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="13203">Gone away</resolution>
                                        <assignee username="ross@mongodb.com">Ross Lawley</assignee>
                                    <reporter username="jeffrey.vanhelden@thewarehouse.co.nz">J vH</reporter>
                        <labels>
                    </labels>
                <created>Tue, 11 Aug 2020 01:24:54 +0000</created>
                <updated>Fri, 27 Oct 2023 19:45:03 +0000</updated>
                            <resolved>Thu, 3 Sep 2020 09:34:54 +0000</resolved>
                                    <version>1.2.0</version>
                                                    <component>Source</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3332029" author="ross@10gen.com" created="Tue, 11 Aug 2020 08:11:01 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jeffrey.vanhelden%40thewarehouse.co.nz&quot; class=&quot;user-hover&quot; rel=&quot;jeffrey.vanhelden@thewarehouse.co.nz&quot;&gt;jeffrey.vanhelden@thewarehouse.co.nz&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Could it be to do with the partition metadata being stored via zookeeper, that has not been replicated to all nodes?  There is nothing that I can see in the source connector that would produce a topic name as such.  You may need to check the Kafka logs.&lt;/p&gt;

&lt;p&gt;Ross&lt;/p&gt;
</comment>
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