TypeError: getaddrinfo() argument 1 must be string or None

[ajayrgb]

Problem

xgboost changed the order of the RabitTracker constructor parameters in 2.1.0

In 2.0.3, host_ip comes first
In 2.1.0, host_ip is second.

This breaks the call here.

Steps to reproduce

1. Create a new venv. Tested with python 3.10.13

2. Install packages

pip install xgboost_ray==0.1.19 xgboost==2.1.0 scikit-learn ray[train]

3. Run example:

from xgboost_ray import RayDMatrix, RayParams, train
from sklearn.datasets import load_breast_cancer

train_x, train_y = load_breast_cancer(return_X_y=True)
train_set = RayDMatrix(train_x, train_y)

evals_result = {}
bst = train(
    {
        "objective": "binary:logistic",
        "eval_metric": ["logloss", "error"],
    },
    train_set,
    evals_result=evals_result,
    evals=[(train_set, "train")],
    verbose_eval=False,
    ray_params=RayParams(
        num_actors=2,  # Number of remote actors
        cpus_per_actor=1))

bst.save_model("model.xgb")
print("Final training error: {:.4f}".format(
    evals_result["train"]["error"][-1]))

Error

2024-07-09 15:35:11,003 INFO main.py:1191 -- [RayXGBoost] Starting XGBoost training.
Traceback (most recent call last):
  File "/home/jovyan/run.py", line 10, in <module>
    bst = train(
  File "/home/jovyan/venv/lib/python3.10/site-packages/xgboost_ray/main.py", line 1612, in train
    bst, train_evals_result, train_additional_results = _train(
  File "/home/jovyan/venv/lib/python3.10/site-packages/xgboost_ray/main.py", line 1194, in _train
    rabit_process, rabit_args = _start_rabit_tracker(alive_actors)
  File "/home/jovyan/venv/lib/python3.10/site-packages/xgboost_ray/main.py", line 261, in _start_rabit_tracker
    rabit_tracker = _RabitTracker(host, num_workers)
  File "/home/jovyan/venv/lib/python3.10/site-packages/xgboost/tracker.py", line 64, in __init__
    get_family(host_ip)  # use python socket to stop early for invalid address
  File "/home/jovyan/venv/lib/python3.10/site-packages/xgboost/tracker.py", line 14, in get_family
    return socket.getaddrinfo(addr, None)[0][0]
  File "/opt/conda/lib/python3.10/socket.py", line 955, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
TypeError: getaddrinfo() argument 1 must be string or None

Proposed solution

Pin the xgboost dependency to <2.1.0

OR

change this line to

rabit_tracker = _RabitTracker(host_ip=host, n_workers=num_workers)

[thedatamonk]

@ajayrgb - thanks for posting this solution. I was facing same issue since that last few days but couldn't figure out anything. Finally this worked.

[balladbang]

thanks, roll-back xgboost to 2.0.3 is useful for me