Getting error after recreating cosmos db - System.IO.InvalidDataException: Could not find the start of the json array in the stream: | Old databases are working fine only getting this error while reading data from new cosmos dbs

Question

Getting error after recreating cosmos db -

error > System.IO.InvalidDataException: Could not find the start of the json array in the stream: |

Old databases are working fine only getting this error while reading data from new cosmos dbs

Answer 1

The error message "Could not find the start of the json array in the stream" typically indicates an issue with the JSON data being read from the Cosmos DB. Here are some potential causes and solutions:

1. Invalid JSON format: Ensure that the data in your new Cosmos DB is in a valid JSON format. You can use tools like JSONLint to validate the JSON structure.
2. Missing or incorrect JSON array: Verify that the data being read is a valid JSON array (e.g., [ {...}, {...} ]). If the data is not an array, modify the code to handle the correct data format.
3. Data corruption: It's possible that the data in the new Cosmos DB is corrupted. Try re-inserting the data or checking for any data inconsistencies.
4. Cosmos DB configuration: Double-check your Cosmos DB configuration, especially the data model, partition key, and indexing policy. Ensure they match the expected format.
5. Code changes: If you've recently updated your code, review the changes to ensure they're not causing the issue. Pay attention to any modifications related to JSON parsing or Cosmos DB interactions.
6. Version conflicts: Verify that your SDK or library versions are compatible with your Cosmos DB instance. Update to the latest versions if necessary.

To troubleshoot further, you can try:

• Checking the Cosmos DB logs for errors or warnings
• Using the Cosmos DB emulator to test the data and configuration locally
• Inspecting the data being read using a debugger or logging statements
• Reaching out to Microsoft Azure support for assistance

Remember to ensure that your code is handling errors and exceptions properly to provide more informative error messages and facilitate debugging.