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We currently identify an HDF5 locked error like this:

def isLockedError(e):
    """
    :param OSError e:
    :returns bool:
    """
    return isErrno(e, errno.EAGAIN)

However EAGAIN might be caused by other issues (e.g. network). So we need to analyze the entire chained exception:

Traceback (most recent call last):
  File ".../h5py/_hl/files.py", line 199, in make_fid
    fid = h5f.open(name, h5f.ACC_RDWR, fapl=fapl)
  File "h5py/_objects.pyx", line 54, in h5py._objects.with_phil.wrapper
  File "h5py/_objects.pyx", line 55, in h5py._objects.with_phil.wrapper
  File "h5py/h5f.pyx", line 88, in h5py.h5f.open
OSError: Unable to open file (unable to lock file, errno = 11, error message = 'Resource temporarily unavailable')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File ".../h5py/_hl/files.py", line 202, in make_fid
    fid = h5f.open(name, h5f.ACC_RDONLY, fapl=fapl)
  File "h5py/_objects.pyx", line 54, in h5py._objects.with_phil.wrapper
  File "h5py/_objects.pyx", line 55, in h5py._objects.with_phil.wrapper
  File "h5py/h5f.pyx", line 88, in h5py.h5f.open
OSError: Unable to open file (unable to lock file, errno = 11, error message = 'Resource temporarily unavailable')

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File ".../h5py/_hl/files.py", line 408, in __init__
    swmr=swmr)
  File ".../h5py/_hl/files.py", line 204, in make_fid
    fid = h5f.create(name, h5f.ACC_EXCL, fapl=fapl, fcpl=fcpl)
  File "h5py/_objects.pyx", line 54, in h5py._objects.with_phil.wrapper
  File "h5py/_objects.pyx", line 55, in h5py._objects.with_phil.wrapper
  File "h5py/h5f.pyx", line 108, in h5py.h5f.create
OSError: Unable to create file (unable to open file: name = 'test.h5', errno = 17, error message = 'File exists', flags = 15, o_flags = c2)