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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-161] MongoSourceTask.poll NullPointerException</title>
                <link>https://jira.mongodb.org/browse/KAFKA-161</link>
                <project id="16285" key="KAFKA">Kafka Connector</project>
                    <description>&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;java.lang.NullPointerExceptionjava.lang.NullPointerException at com.mongodb.kafka.connect.source.MongoSourceTask.poll(MongoSourceTask.java:&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;213&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;) at org.apache.kafka.connect.runtime.WorkerSourceTask.poll(WorkerSourceTask.java:&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;272&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;) at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:&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;239&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;) at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:&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;184&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;) at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:&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;234&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;) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;511&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;) at java.util.concurrent.FutureTask.run(FutureTask.java:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;266&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:&lt;/span&gt;&lt;span style=&quot;color: #009900; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;1149&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:&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;624&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;) at java.lang.Thread.run(Thread.java:&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;748&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;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;I guess it&apos;s because heartbeatManager not creating in com.mongodb.kafka.connect.source.MongoSourceTask#start if shouldCopyData()=true.&lt;br/&gt;
So, in such case heartbeatManager.heartbeat() could be called when heartbeatManager not created yet.&lt;/p&gt;

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

&lt;p&gt;Found this error in the last master.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1482348">KAFKA-161</key>
            <summary>MongoSourceTask.poll NullPointerException</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="ross@mongodb.com">Ross Lawley</assignee>
                                    <reporter username="andreworty@gmail.com">Andrey B</reporter>
                        <labels>
                    </labels>
                <created>Mon, 21 Sep 2020 18:31:43 +0000</created>
                <updated>Thu, 2 Jun 2022 15:21:01 +0000</updated>
                            <resolved>Tue, 22 Sep 2020 10:34:40 +0000</resolved>
                                                                    <component>Source</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3406078" author="JIRAUSER1269378" created="Tue, 22 Sep 2020 20:38:32 +0000"  >&lt;p&gt;I&apos;ve attached a patch which makes &lt;b&gt;testSourceUsesHeartbeatsForOffsets&lt;/b&gt; fails with such&#160;NullPointerException&lt;/p&gt;

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

&lt;p&gt;Thanks for fix&lt;/p&gt;</comment>
                            <comment id="3404892" author="ross@10gen.com" created="Tue, 22 Sep 2020 11:08:31 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=andreworty%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;andreworty@gmail.com&quot;&gt;andreworty@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;If possible it would be good to get a &lt;a href=&quot;https://stackoverflow.com/help/minimal-reproducible-example&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;a minimal, reproducible example&lt;/a&gt; of this error, so I can write a regression test. I&apos;m happy its fixed but it would be nice to have.&lt;/p&gt;

&lt;p&gt;Thanks again, for all your feedback and for kicking the tires of the forthcoming new connector release.&lt;/p&gt;

&lt;p&gt;Ross&lt;/p&gt;</comment>
                            <comment id="3404858" author="ross@10gen.com" created="Tue, 22 Sep 2020 10:34:22 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=andreworty%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;andreworty@gmail.com&quot;&gt;andreworty@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;I couldn&apos;t replicate the error and thought that it was caught previously as it aligns when the cursor is closed. However, I&apos;ve added a defensive block to ensure no NPE&apos;s.&lt;/p&gt;

&lt;p&gt;Ross&lt;/p&gt;</comment>
                            <comment id="3404853" author="xgen-internal-githook" created="Tue, 22 Sep 2020 10:31:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Ross Lawley&apos;, &apos;email&apos;: &apos;ross.lawley@gmail.com&apos;, &apos;username&apos;: &apos;rozza&apos;}
&lt;p&gt;Message: Defensively handle the heartbeat manager&lt;/p&gt;

&lt;p&gt;Also ensure its reset on restart.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/KAFKA-161&quot; title=&quot;MongoSourceTask.poll NullPointerException&quot; class=&quot;issue-link&quot; data-issue-key=&quot;KAFKA-161&quot;&gt;&lt;del&gt;KAFKA-161&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-kafka/commit/be9b6d82ce00498e1912e5df792d468194051eb1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-kafka/commit/be9b6d82ce00498e1912e5df792d468194051eb1&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="279797" name="reproduce-kafka-161.patch" size="1814" author="andreworty@gmail.com" created="Wed, 23 Sep 2020 22:04:26 +0000"/>
                    </attachments>
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