[BUG] Apply Function get HTTP Error about mars

[Suphx]

Loading a dataframe from a pandas.dataframe is Ok, the Mars Cluster seems not to crash or fail.

[fyrestone]

How did you initialize the Mars session? The error came from the Mars web session. Could you try to initialize the Mars session by mars.new_session(backend='ray') or mars.new_ray_session(backend='ray')? Ray execution backend does not use the Mars web session at all.

[fyrestone]

If you want use Mars on Ray in cluster mode. The following simple steps should work:

• Start a Ray cluster, please refer to https://docs.ray.io/en/latest/cluster/key-concepts.html. (Pre-install Mars in the cluster can avoid using Ray runtime env).
• ray.init to connect to the cluster, please refer to https://docs.ray.io/en/latest/ray-core/api/doc/ray.init.html.
• mars.new_ray_session(backend='ray') to run Mars on Ray.

[qinxuye]

@fyrestone Does the user mention that he is using ray backend?

[fyrestone]

@fyrestone Does the user mention that he is using ray backend?

No. But the ray backend is easier to use and don't have this problem at all, why not give it a try?

[qinxuye]

Is this issue addressed @Suphx ? I noticed that you have closed it.