OSError：安装 h2o 时版本不匹配？

Question

我是 H2o 的新手。基于documentation我为python安装了H2o

$ pip install h2o

然后：

在：

import h2o
h2o.init()

输出：

---

OSError                                   Traceback (most recent call last)
<ipython-input-1-07f8bb8f27db> in <module>()
      1 import h2o
----> 2 h2o.init()

/usr/local/lib/python3.5/site-packages/h2o/h2o.py in init(ip, port, start_h2o, enable_assertions, license, nthreads, max_mem_size, min_mem_size, ice_root, strict_version_check, proxy, https, insecure, username, password, max_mem_size_GB, min_mem_size_GB, proxies, size)
    849                 nthreads=nthreads,max_mem_size=max_mem_size,min_mem_size=min_mem_size,ice_root=ice_root,
    850                 strict_version_check=strict_version_check,proxy=proxy,https=https,insecure=insecure,username=username,
--> 851                 password=password,max_mem_size_GB=max_mem_size_GB,min_mem_size_GB=min_mem_size_GB,proxies=proxies,size=size)
    852   return None
    853 

/usr/local/lib/python3.5/site-packages/h2o/connection.py in __init__(self, ip, port, start_h2o, enable_assertions, license, nthreads, max_mem_size, min_mem_size, ice_root, strict_version_check, proxy, https, insecure, username, password, max_mem_size_GB, min_mem_size_GB, proxies, size)
    173           raise EnvironmentError("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
    174                                  "This is a developer build, please contact your developer."
--> 175                                  "".format(ver_h2o, str(ver_pkg)))
    176         else:
    177           raise EnvironmentError("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "

OSError: Version mismatch. H2O is version 3.8.2.99999, but the h2o-python package is version 3.8.2.6-1. This is a developer build, please contact your developer.

从这个website，我尝试如下解决这个问题：

h2o.shutdown

然后：

user@MacBook-Pro-of-User:~$ pip3 uninstall h2o
Uninstalling h2o-3.8.2.6-1:
  /usr/local/h2o_data/iris.csv
  /usr/local/h2o_data/prostate.csv
  /usr/local/h2o_jar/h2o.jar
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/DESCRIPTION.rst
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/INSTALLER
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/METADATA
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/RECORD
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/WHEEL
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/metadata.json
  /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/top_level.txt
  /usr/local/lib/python3.5/site-packages/h2o/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/assembly.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/astfun.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/connection.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/cross_validation.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/demo.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/display.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/expr.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/frame.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/group_by.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/h2o.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/h2o_logging.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/job.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/__pycache__/two_dim_table.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/assembly.py
  /usr/local/lib/python3.5/site-packages/h2o/astfun.py
  /usr/local/lib/python3.5/site-packages/h2o/connection.py
  /usr/local/lib/python3.5/site-packages/h2o/cross_validation.py
  /usr/local/lib/python3.5/site-packages/h2o/demo.py
  /usr/local/lib/python3.5/site-packages/h2o/display.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/deeplearning.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/estimator_base.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/gbm.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/glm.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/glrm.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/kmeans.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/naive_bayes.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/random_forest.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/estimators/deeplearning.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/estimator_base.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/gbm.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/glm.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/glrm.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/kmeans.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/naive_bayes.py
  /usr/local/lib/python3.5/site-packages/h2o/estimators/random_forest.py
  /usr/local/lib/python3.5/site-packages/h2o/expr.py
  /usr/local/lib/python3.5/site-packages/h2o/frame.py
  /usr/local/lib/python3.5/site-packages/h2o/grid/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/grid_search.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/metrics.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/grid/grid_search.py
  /usr/local/lib/python3.5/site-packages/h2o/grid/metrics.py
  /usr/local/lib/python3.5/site-packages/h2o/group_by.py
  /usr/local/lib/python3.5/site-packages/h2o/h2o.py
  /usr/local/lib/python3.5/site-packages/h2o/h2o_logging.py
  /usr/local/lib/python3.5/site-packages/h2o/job.py
  /usr/local/lib/python3.5/site-packages/h2o/model/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/autoencoder.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/binomial.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/clustering.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/confusion_matrix.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/dim_reduction.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/metrics_base.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_base.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_builder.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_future.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/multinomial.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/regression.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/model/autoencoder.py
  /usr/local/lib/python3.5/site-packages/h2o/model/binomial.py
  /usr/local/lib/python3.5/site-packages/h2o/model/clustering.py
  /usr/local/lib/python3.5/site-packages/h2o/model/confusion_matrix.py
  /usr/local/lib/python3.5/site-packages/h2o/model/dim_reduction.py
  /usr/local/lib/python3.5/site-packages/h2o/model/metrics_base.py
  /usr/local/lib/python3.5/site-packages/h2o/model/model_base.py
  /usr/local/lib/python3.5/site-packages/h2o/model/model_builder.py
  /usr/local/lib/python3.5/site-packages/h2o/model/model_future.py
  /usr/local/lib/python3.5/site-packages/h2o/model/multinomial.py
  /usr/local/lib/python3.5/site-packages/h2o/model/regression.py
  /usr/local/lib/python3.5/site-packages/h2o/transforms/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/decomposition.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/preprocessing.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/transform_base.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/transforms/decomposition.py
  /usr/local/lib/python3.5/site-packages/h2o/transforms/preprocessing.py
  /usr/local/lib/python3.5/site-packages/h2o/transforms/transform_base.py
  /usr/local/lib/python3.5/site-packages/h2o/two_dim_table.py
  /usr/local/lib/python3.5/site-packages/h2o/utils/__init__.py
  /usr/local/lib/python3.5/site-packages/h2o/utils/__pycache__/__init__.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/utils/__pycache__/shared_utils.cpython-35.pyc
  /usr/local/lib/python3.5/site-packages/h2o/utils/shared_utils.py
Proceed (y/n)? y
  Successfully uninstalled h2o-3.8.2.6-1
user@MacBook-Pro-of-User:~$

然后我尝试升级到最新版本：

user@MacBook-Pro-of-User:~$ pip3 install http://h2o-release.s3.amazonaws.com/h2o/rel-turchin/6/Python/h2o-3.8.2.6-py2.py3-none-any.whl

但是，我得到了同样的错误信息：

OSError: Version mismatch. H2O is version 3.8.2.99999, but the h2o-python package is version 3.8.2.6. This is a developer build, please contact your developer.

如何正确安装 h2o for python?.

Answer 1

In order to use H2O, need to update the h20 jar file to python version. 

删除磁盘上的 H20 版本并重新安装。然后pip install h20.

或按照以下说明操作：

http://www.h2o.ai/download/h2o/python

Answer 2

首先使用最新版本的 H2O 重试：

pip3 uninstall h2o
pip3 install http://h2o-release.s3.amazonaws.com/h2o/rel-turchin/9/Python/h2o-3.8.2.9-py2.py3-none-any.whl

如果您遇到同样的问题，请执行以下操作：

您的机器上似乎已经运行了 H2O 的开发版本 (3.8.2.99999)。您将需要终止运行开发版本的 H2O 集群。您可以通过以下方式之一执行此操作：

• 导航到 H2O Flow Web GUI（如果您在本地运行，默认情况下位于 localhost:54321）。在 GUI 中，单击“管理”菜单项，然后单击“关闭”。
• 终止运行 H2O 集群的 Java 进程。

一旦你杀死了现有的 H2O 集群，然后重新安装 h2o 模块，并直接从 Python 启动 H2O 集群，如下所示：

import h2o
h2o.init()

由于此时没有运行现有的 H2O 集群，h2o Python 模块将为您启动一个（并且由于您是从 Python 启动的，它不会对版本感到困惑）。

有时会发生人们单独下载 H2O jar 文件，启动 H2O 集群，然后安装不同版本的 R 或 Python 包，从而导致不匹配错误。我认为这可能是您的问题的原因。通常启动一个H2O集群就像import h2o; h2o.init()一样简单。

Answer 3

如果您打开了 h2o 窗口 @http://localhost:54321 ，请确保在导入 python 或 python3 之前将其关闭（Admin->shutDown），因为它们会产生冲突。

Answer 4

默认情况下，H2O 对版本不匹配非常宽容。

要解决这个问题，你可以试试这个（不保证有效！）：

 h2o.init(
    strict_version_check=False
)

Answer 5

尝试使用非默认端口号。例如：h2o.init(port=8888)

此错误可能是由于连接到错误版本的已运行 H2O 服务器造成的。当您运行 h2o.init() 时，它首先检查在默认端口 54321 上运行的现有服务器。如果您系统上的另一个用户在该端口上运行不同的 H2O 版本，它将连接并引发版本冲突。