search

HDFGroup / vol-rest

HDF5 REST VOL Connector
Other
5 stars 8 forks source link

H5Sselect_hyperslab required when using filespace from H5Dget_space #2

Closed jpswinski closed 1 year ago

jpswinski commented 4 years ago

When calling H5Dread, if the filespace parameter was allocated by a call to H5Dget_space, you must also call H5Sselect_hyperslab on the filespace in order for the read to work. If you don't then the vol-rest connector returns: 

#000: /home/ubuntu/dependencies/vol-rest/src/rest_vol_dataset.c line 592 in RV_dataset_read(): 400 - Malformed/Bad request for resource

This is inconsistent with the regular hdf5 library which works fine when you pass the filespace gotten from the H5Dget_space directly into the H5Dread function.

jhendersonHDF commented 4 years ago

Thanks for reporting this; it seems like HDF5 probably sets an "All" selection by default on a dataspace when it is created, which the REST VOL connector currently is not doing when creating/opening a dataset or attribute. Let me investigate and add another test for this.

mattjala commented 1 year ago

I was unable to replicate this - it seemed to have been fixed. This can be reopened if it comes up again.