Fix IllegalArgumentException

✅ Solution

IllegalArgumentException in Logstash often arises from incorrect data type handling, particularly when a field's expected data type doesn't match the actual data being processed. Fix this by ensuring your Logstash configuration correctly casts or converts field values to the expected types using processors like mutate or ruby filters *before* they are used in operations expecting specific data types, and validate field content/format with a grok filter if necessary..