Data loss in Big Query while using Firebase.

[ArtemTreskov]

Hi!
We have noticed a discrepancy in the data between Firebase and BigQuery since the end of February. Earlier there was no mismatch past few days we see there is lots of data is missing. Re-link Firebase to BigQuery did not help.
What could be the problem?

[ms4446]

Firebase and BigQuery are designed to synchronize data seamlessly. Any disruption in this synchronization process can result in missing data in BigQuery. Identifying that the issue began recently helps narrow down potential causes and troubleshooting efforts.

Potential Causes

• Export Issues:

  • Incomplete Exports: There may be interruptions in Firebase's daily data exports to BigQuery, or exports might not be occurring as expected.
  • Data Transformation Errors: The process that prepares Firebase data for BigQuery could be encountering errors, leading to data being misinterpreted or corrupted during transformation.

• BigQuery Configuration:

  • Incorrect Permissions: BigQuery requires specific permissions to receive and store data from Firebase. Insufficient permissions can prevent data transfer.
  • Table Schema Mismatch: If the Firebase data structure has changed, these changes might not be automatically updated in BigQuery's table schema, causing data to be rejected.

• Firebase Data Collection:

  • Event Tracking Problems: Internal issues within Firebase could be affecting the collection of event data, resulting in incomplete data before the export process even begins.
  • SDK Issues: Problems with the Firebase SDK implementation in your app could lead to incorrect event logging.

Troubleshooting Steps

• Check Service Status:

• Verify Export Settings:

  • Confirm Link: Ensure the Firebase project is correctly linked to BigQuery in the Firebase console.
  • Export Logs: Investigate logs related to BigQuery data exports within the Firebase project for any error messages or anomalies.

• Check BigQuery Configuration:

  • Required Permissions: Verify that BigQuery has the necessary permissions to access and store data from Firebase.
  • Table Schema: Review and compare the data structure in Firebase with the schema of the corresponding BigQuery tables for any discrepancies.

• Examine Firebase Data Collection:

  • Debug Mode: Enable debug mode in your Firebase SDK to gain detailed insights into event logging activities.
  • Monitor Device Logs: Check logs from your application's devices for any signs of issues in data collection processes.

Additional Considerations

• Time Zone Discrepancies: Ensure that the time zone settings in your Firebase project and BigQuery are consistent, as mismatches can lead to data discrepancies.
• Recent Updates: Assess whether any recent changes in your Firebase project structure or application code could impact data collection or the export process.

If the Issue Persists

• Gather Detailed Information: Compile detailed information about the missing data, any observed error messages, and any recent changes to your project or code.
• Contact Support: For further assistance, consider reaching out to Google Cloud support or Firebase support, providing them with the detailed information you've gathered. They may offer additional insights or access to logs that can help resolve the issue.

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[anzarbanday]

Have you resolved this? If yes, could you pls provide some details about the resolution?