Currently the NN logs are littered with messages like
```Invalid State. deleted blk is not recognized. bid=XYZ```
This happens because when a DN deletes a block it sends an incremental block report for the deleted block. However, if the block belongs to a deleted file then the NN is unable to determine the inodeID and prints this message. The log level is changed to WARN and it is printed if the block metadata is not found and block state is not "DELETE"