These messages should be rejected by Insights Results Writer and also by CCS Notification Writer services as their format is unexpected or wrong at all. OTOH such data are very valuable for testing etc.
These messages are stored in messages/broken/ subdirectory.
messages/broken/added_items*.json- reports with added items (that should not be in there)messages/broken/mutated_items*.json- reports with mutated itemsmessages/broken/without_*.json- reports without one or more attributes
Please note that all messages are stored in JSON format to be consumed by Insights Results Writer service. Additionally all messages are also stored in EDN format to be consumed by analysis tools.