Forum Discussion

rks's avatar
rks
Resolver II
1 year ago
Solved

Corrupted metadata detected while processing the Direct Lake table

Hi, I have tried to refresh a data set based on the new OneLake Mode for Direct Lake. I ran into this error: Corrupted metadata detected while processing the Direct Lake table (TableTMID='xxx'). The...
data engineering
  • v-prasare's avatar
    v-prasare
    1 year ago

    Hi rks,

    Can you try once below trobleshooting steps and let me know if this helps?

     

    1. The error may be due to corrupted or improperly copied Parquet files. Avoid manual file copying and use Dataflows or notebooks to move data properly.

    2. Schema mismatches between source and target lakehouses can cause issues. Ensure the schema is identical by comparing with a Spark notebook.

    3. Hidden metadata files might be missing after manual copying. These are essential for correct operation and are not copied with normal file tools.

    4. Modifying partitions using TMDL can cause issues if model bindings don't align with the data files. Double-check your partition paths and formats.

    5. To resolve the issue, recreate the table using Fabric tools, re-ingest the data, validate the schema, and rebind the model accurately.

     

     

     

     

    Thanks,
    Prashanth Are
    MS Fabric community support

     

    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly and give Kudos if helped you resolve your query

     

     

v-prasare's avatar
v-prasare
Community Support
1 year ago

Hi rks,

Can you try once below trobleshooting steps and let me know if this helps?

 

  1. The error may be due to corrupted or improperly copied Parquet files. Avoid manual file copying and use Dataflows or notebooks to move data properly.

  2. Schema mismatches between source and target lakehouses can cause issues. Ensure the schema is identical by comparing with a Spark notebook.

  3. Hidden metadata files might be missing after manual copying. These are essential for correct operation and are not copied with normal file tools.

  4. Modifying partitions using TMDL can cause issues if model bindings don't align with the data files. Double-check your partition paths and formats.

  5. To resolve the issue, recreate the table using Fabric tools, re-ingest the data, validate the schema, and rebind the model accurately.

 

 

 

 

Thanks,
Prashanth Are
MS Fabric community support

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly and give Kudos if helped you resolve your query

 

 

rks's avatar
rks
Resolver II
1 year ago

Hi v-prasare 
Maybe you can help me once more? I was able to follow the documentation up to a point where I created a lakehouse with shortcuts to the semantic model. Then I wanted to use the Copy Job fabric item to move the data phyiscally into another lakehouse. However there's an error message preventing me to create the job:

Is there another way to move the data? I am not proficient with Python (notebooks)...