Graylog: How to resolve the issue

This documentation is part of the Data mapping issues guide. You can view the complete guide here: How to resolve Graylog index data mapping problems.

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To resolve this issue, you have two options:

1. Ensure consistent data types across systems

The ideal solution is to standardize the data types used for fields across all systems sending data to Graylog. For example, make sure the "level" field is always sent as either a string (such as "error", "warn", etc.) or always as a number (3, 4, etc.). This consistency prevents mapping conflicts and ensures all documents are ingested correctly.

2. Use Graylog pipelines for data conversion

If standardizing data types across all systems is not possible, you can use Graylog's pipelines to convert data types upon receipt. Pipelines allow you to define rules that transform data based on specific conditions.

To implement this solution:

• Go to "System" > "Pipelines" in the Graylog web interface.
• Click "Add new pipeline" to create a new pipeline.
• Define rules to convert the "level" field (or other fields) to the desired data type. For example, you can convert numeric levels to their corresponding string representations (such as 3 to "error", 4 to "warning", etc.).

This approach ensures that all incoming data matches the expected data types, preventing mapping conflicts.