Chronos Known Issue#

Version Compatibility Issues#

Numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject#

Problem description

It seems to be a numpy compatibility issue, we do not recommend to solve it by downgrading Numpy to 1.19.x, when no other issues exist, the solution is given below.

Solution

  • pip install -y pycocotools

  • pip install pycocotools --no-cache-dir --no-binary :all:

  • conda install –c conda-forge pycocotools

Cannot convert a symbolic Tensor (encoder_lstm_8/strided_slice:0) to a numpy array#

Problem description

This is a compatibility issue caused by Tensorflow and Numpy 1.20.x

Solution

  • pip install numpy==1.19.5

StanModel object has no attribute ‘fit_class’#

Problem description

We recommend reinstalling prophet using conda or miniconda.

Solution

  • pip uninstall pystan prophet –y

  • conda install –c conda-forge prophet=1.0.1

Dependency Issues#

RuntimeError: No active RayContext#

Problem description

Exception: No active RayContext. Please call init_orca_context to create a RayContext.

ray_ctx = RayContext.get()
ray_ctx = RayContext.get(initialize=False)

Solution

  • Make sure all operations are before stop_orca_context.

  • No other RayContext exists before init_orca_context.

error while loading shared libraries: libunwind.so.8: cannot open shared object file: No such file or directory.#

Problem description

A dependency is missing from your environment, only happens when you run source bigdl-nano-init.

Solution

  • apt-get install libunwind8-dev