Error in retrieving a cutout from a tutorial notebook

Support
#1

I am getting an error while running the tutorial notebook 103.4. Rubin Cutout Service , section 3.2 Retrieve the Cutout. Running the code

cutout_bytes = sq.execute_stream().read()
sq.raise_if_error()
mem = MemFileManager(len(cutout_bytes))
mem.setData(cutout_bytes, len(cutout_bytes))
exposure = ExposureF(mem)

retrieves the following error message:

FitsError Traceback (most recent call last)
Cell In[84], line 5
3 mem = MemFileManager(len(cutout_bytes))
4 mem.setData(cutout_bytes, len(cutout_bytes))
----> 5 exposure = ExposureF(mem)

FitsError:
File “src/fits.cc”, line 540, in void lsst::afw::fits::Fits::setHdu(int, bool)
cfitsio error (unused): tried to move past end of file (107) : Moving to HDU 4
cfitsio error stack:
{0}
lsst::afw::fits::FitsError: 'cfitsio error (unused): tried to move past end of file (107) : Moving to HDU 4
cfitsio error stack

A colleague also tested it and got the same error.

#2

Apologies, this was my fault. This should now be fixed.

We’re working on updating the cutout service to a newer version that is much faster but returns less information by default (only the pixels and not the other data), with an option to get the full data if you need it. I updated the services prematurely on Thursday. They’ve been rolled back now until the corresponding updates to tutorials and documentation are ready.

1 Like
#3

Thank you Russ for your very quick response! I’ve been having a great experiencie with the Rubin Plataform. This communication is essencial for everything to work well and for everyone to benefit from It. Thank you very much!

#4

Hi, I was getting the same error today when trying to retrieve cutouts and came across this thread. Is the update now happening and therefore is the error expected?

#5

I think there is an announcement coming, but yesterday we updated both the tutorial notebooks and the cutout and DataLink services for the new cutout behavior. If you get a new copy of the tutorial, it should work correctly.

The very short version is that you should use cutout-sync-exposure instead of cutout-sync as the name of the SODA service if you want the old behavior. The default behavior is now to only return the image pixels, which is much faster.