| consuming of messages. The KCL uses DynamoDB to track the state of consumers and requires cloudwatch access to log metrics.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="configuration">Configuration<a href="#configuration" class="hash-link" aria-label="Direct link to Configuration" title="Direct link to Configuration"></a></h2><p>The configuration of the DynamoDB source connector has the following properties.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="property">Property<a href="#property" class="hash-link" aria-label="Direct link to Property" title="Direct link to Property"></a></h3><table><thead><tr><th>Name</th><th>Type</th><th>Required</th><th>Default</th><th>Description</th></tr></thead><tbody><tr><td><code>initialPositionInStream</code></td><td>InitialPositionInStream</td><td>false</td><td>LATEST</td><td>The position where the connector starts from.<br><br>Below are the available options:<br><br><li><code>AT_TIMESTAMP</code>: start from the record at or after the specified timestamp.<br><br></li><li><code>LATEST</code>: start after the most recent data record.<br><br></li><li><code>TRIM_HORIZON</code>: start from the oldest available data record.</li></td></tr><tr><td><code>startAtTime</code></td><td>Date</td><td>false</td><td>" " (empty string)</td><td>If set to <code>AT_TIMESTAMP</code>, it specifies the point in time to start consumption.</td></tr><tr><td><code>applicationName</code></td><td>String</td><td>false</td><td>Pulsar IO connector</td><td>The name of the KCL application. Must be unique, as it is used to define the table name for the dynamo table used for state tracking. <br><br>By default, the application name is included in the user agent string used to make AWS requests. This can assist with troubleshooting, for example, distinguish requests made by separate connector instances.</td></tr><tr><td><code>checkpointInterval</code></td><td>long</td><td>false</td><td>60000</td><td>The frequency of the KCL checkpoint in milliseconds.</td></tr><tr><td><code>backoffTime</code></td><td>long</td><td>false</td><td>3000</td><td>The amount of time to delay between requests when the connector encounters a throttling exception from AWS Kinesis in milliseconds.</td></tr><tr><td><code>numRetries</code></td><td>int</td><td>false</td><td>3</td><td>The number of re-attempts when the connector encounters an exception while trying to set a checkpoint.</td></tr><tr><td><code>receiveQueueSize</code></td><td>int</td><td>false</td><td>1000</td><td>The maximum number of AWS records that can be buffered inside the connector. <br><br>Once the <code>receiveQueueSize</code> is reached, the connector does not consume any messages from Kinesis until some messages in the queue are successfully consumed.</td></tr><tr><td><code>dynamoEndpoint</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The Dynamo end-point URL, which can be found at <a href="https://docs.aws.amazon.com/general/latest/gr/rande.html" target="_blank" rel="noopener noreferrer">here</a>.</td></tr><tr><td><code>cloudwatchEndpoint</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The Cloudwatch end-point URL, which can be found at <a href="https://docs.aws.amazon.com/general/latest/gr/rande.html" target="_blank" rel="noopener noreferrer">here</a>.</td></tr><tr><td><code>awsEndpoint</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The DynamoDB Streams end-point URL, which can be found at <a href="https://docs.aws.amazon.com/general/latest/gr/rande.html" target="_blank" rel="noopener noreferrer">here</a>.</td></tr><tr><td><code>awsRegion</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The AWS region. <br><br><strong>Example</strong><br> us-west-1, us-west-2</td></tr><tr><td><code>awsDynamodbStreamArn</code></td><td>String</td><td>true</td><td>" " (empty string)</td><td>The DynamoDB stream arn.</td></tr><tr><td><code>awsCredentialPluginName</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The fully-qualified class name of implementation of <a href="https://github.com/apache/pulsar/tree/master//pulsar-io/aws/src/main/java/org/apache/pulsar/io/aws/AwsCredentialProviderPlugin.java" target="_blank" rel="noopener noreferrer">AwsCredentialProviderPlugin</a>.<br><br><code>awsCredentialProviderPlugin</code> has the following built-in plugs:<br><br><li><code>org.apache.pulsar.io.kinesis.AwsDefaultProviderChainPlugin</code>:<br> this plugin uses the default AWS provider chain.<br>For more information, see <a href="https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/credentials.html#credentials-default" target="_blank" rel="noopener noreferrer">using the default credential provider chain</a>.<br><br></li><li><code>org.apache.pulsar.io.kinesis.STSAssumeRoleProviderPlugin</code>: <br>this plugin takes a configuration via the <code>awsCredentialPluginParam</code> that describes a role to assume when running the KCL.<br><strong>JSON configuration example</strong><br><code>{"roleArn": "arn...", "roleSessionName": "name"}</code> <br><br><code>awsCredentialPluginName</code> is a factory class which creates an AWSCredentialsProvider that is used by Kinesis sink. <br><br>If <code>awsCredentialPluginName</code> set to empty, the Kinesis sink creates a default AWSCredentialsProvider which accepts json-map of credentials in <code>awsCredentialPluginParam</code>.</li></td></tr><tr><td><code>awsCredentialPluginParam</code></td><td>String</td><td>false</td><td>" " (empty string)</td><td>The JSON parameter to initialize <code>awsCredentialsProviderPlugin</code>.</td></tr></tbody></table><h3 class="anchor anchorWithStickyNavbar_LWe7" id="example">Example<a href="#example" class="hash-link" aria-label="Direct link to Example" title="Direct link to Example"></a></h3><p>Before using the DynamoDB source connector, you need to create a configuration file through one of the following methods.</p><ul><li><p>JSON</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"configs"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"awsEndpoint"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"https://some.endpoint.aws"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"awsRegion"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"us-east-1"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"awsDynamodbStreamArn"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"arn:aws:dynamodb:us-west-2:111122223333:table/TestTable/stream/2015-05-11T21:21:33.291"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"awsCredentialPluginParam"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"{\"accessKey\":\"myKey\",\"secretKey\":\"my-Secret\"}"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"applicationName"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"My test application"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"checkpointInterval"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"30000"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"backoffTime"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"4000"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"numRetries"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"3"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"receiveQueueSize"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token number">2000</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"initialPositionInStream"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"TRIM_HORIZON"</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token property">"startAtTime"</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"2019-03-05T19:28:58.000Z"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></li><li><p>YAML</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token key atrule">configs</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">awsEndpoint</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"https://some.endpoint.aws"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">awsRegion</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"us-east-1"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">awsDynamodbStreamArn</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"arn:aws:dynamodb:us-west-2:111122223333:table/TestTable/stream/2015-05-11T21:21:33.291"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">awsCredentialPluginParam</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"{\"accessKey\":\"myKey\",\"secretKey\":\"my-Secret\"}"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">applicationName</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"My test application"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">checkpointInterval</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token number">30000</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">backoffTime</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token number">4000</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">numRetries</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token number">3</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">receiveQueueSize</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token number">2000</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">initialPositionInStream</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"TRIM_HORIZON"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token key atrule">startAtTime</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">"2019-03-05T19:28:58.000Z"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" 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