This topic was automatically generated from Slack. You can find the original thread here.
I am getting an error with a DynamoDB stream event trigger. How do I fix?
ExpiredIteratorException: Shard iterator has expired
It seems like you’re encountering an ExpiredIteratorException error with a DynamoDB stream event trigger. This error typically occurs when the shard iterator used to read from the stream has expired. Here are some steps you can take to resolve this issue: 1. Understand Shard Iterator Expiry: Shard iterators in DynamoDB Streams are valid for a limited duration. If you attempt to use an expired iterator, you’ll receive this error. It’s important to ensure that your application retrieves a new iterator if the current one expires. 2. Retrieve a New Shard Iterator: When you receive the ExpiredIteratorException, you should request a new shard iterator by calling the GetShardIterator API again. Use the LATEST or TRIM_HORIZON iterator type to get a new starting point for reading records. 3. Implement Error Handling: Add error handling logic in your application to catch the ExpiredIteratorException. When this exception is caught, your application should automatically request a new shard iterator and continue processing the stream. 4. Consider Using Enhanced Fan-Out: If your application is experiencing high latency or throughput, consider using DynamoDB Streams’ enhanced fan-out feature. This feature provides a dedicated throughput for each consumer, reducing the likelihood of iterator expiration due to delays in processing. 5. Monitor and Adjust: Monitor your application’s performance and adjust the processing logic if necessary. Ensure that your application processes records efficiently to minimize the risk of iterator expiration. If you continue to experience issues, you may want to review your application’s logic for handling DynamoDB Streams or consult AWS support for further assistance.
This is a pipedream internal node that I can’t modify which is supposed to trigger the event. I have tried changing the dynamo table stream to a different stream and it still fails. All I am modifying is the prop, as I don’t have access to the code.
I’m sorry to hear you’re experiencing issues with a Pipedream internal node. It sounds like you’re encountering a “Pipedream Internal Error,” which can occur when there’s an exception during the building or execution of a workflow that is outside the scope of the code for individual components. Here are a few steps you can take to troubleshoot the issue: 1. Check the Logs: Review the logs for any specific error messages that might give you more insight into what’s going wrong. This can help identify if there are any specific issues with the DynamoDB stream or the configuration. 2. Validate the DynamoDB Stream Configuration: Ensure that the DynamoDB stream is correctly configured and that the necessary permissions are in place for Pipedream to access the stream. 3. Test with a Sample Event: If possible, try testing the workflow with a sample event to see if the issue persists. This can help determine if the problem is with the stream data or the workflow configuration. 4. Contact Support: If you’re unable to resolve the issue, consider reaching out to Pipedream support for further assistance. You can visit https://pipedream.com/support for more support options. If you have any additional details or specific error messages, feel free to share them, and I can try to provide more targeted assistance.
This is the error in the logs… ExpiredIteratorException: Shard iterator has expired
The error message ExpiredIteratorException: Shard iterator has expired typically occurs when working with AWS Kinesis. This error indicates that the shard iterator you are using has expired. Shard iterators are used to read data from a shard in a Kinesis stream, and they have a limited lifespan. To resolve this issue, you can: 1. Obtain a New Shard Iterator: You need to request a new shard iterator from the Kinesis stream. You can do this by calling the GetShardIterator API again with the appropriate parameters. 2. Use a Different Iterator Type: If you are using an iterator type that is prone to expiration (e.g., AT_SEQUENCE_NUMBER or AFTER_SEQUENCE_NUMBER), consider using TRIM_HORIZON or LATEST to get a new iterator that points to the oldest or latest record in the shard, respectively. 3. Increase the Frequency of Polling: If your application is not polling the stream frequently enough, the iterator might expire. Ensure that your application polls the stream at a regular interval that is within the iterator’s lifespan. If you need further assistance or if this issue persists, you can visit Pipedream Support for more support options.