python 3.x:H2OFrame崩溃 - 解析Pandas数据帧

时间:2017-08-23 11:19:45

标签: python python-3.x pandas dataframe h2o

我是H2O(python包)的早期首发。我的问题是我无法弄清楚如何成功地从Pandas的数据框中创建H2OFrame。

我的环境是:

  • Windows 10 Home,内部版本15063.540,内存为16,0 GB
  • Java SE开发工具包8u144(64位)
  • Java SE运行时环境(版本1.8.0_144-b01)
  • Anaconda Python 3.5.4

我用h2o.init()启动了服务器:

H2O cluster uptime: 19 hours 14 mins
H2O cluster version:    3.14.0.1
H2O cluster version age:    12 days
H2O cluster name:   H2O_from_python_pedro_23i63g
H2O cluster total nodes:    1
H2O cluster free memory:    3.456 Gb
H2O cluster total cores:    4
H2O cluster allowed cores:  4
H2O cluster status: locked, healthy
H2O connection url: http://localhost:54321
H2O connection proxy:   None
H2O internal security:  False
H2O API Extensions: Algos, AutoML, Core V3, Core V4
Python version: 3.5.4 final

我正在尝试通过以下命令从 train1 pandas'数据框创建我的H2OFrame:

hf1 = h2o.H2OFrame(train1)

崩溃信息:

OSError: Job with key $03017f00000132d4ffffffff$_8ef7ebc5204725b046d7b31ca7194c71 failed with an exception: DistributedException from /127.0.0.1:54321: 'null', caused by java.lang.AssertionError
stacktrace: 
DistributedException from /127.0.0.1:54321: 'null', caused by java.lang.AssertionError
    at water.MRTask.getResult(MRTask.java:478)
    at water.MRTask.getResult(MRTask.java:486)
    at water.MRTask.doAll(MRTask.java:402)
    at water.parser.ParseDataset.parseAllKeys(ParseDataset.java:245)
    at water.parser.ParseDataset.access$000(ParseDataset.java:26)
    at water.parser.ParseDataset$ParserFJTask.compute2(ParseDataset.java:194)
    at water.H2O$H2OCountedCompleter.compute(H2O.java:1255)
    at jsr166y.CountedCompleter.exec(CountedCompleter.java:468)
    at jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:263)
    at jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:974)
    at jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1477)
    at jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)
Caused by: java.lang.AssertionError
    at water.parser.Categorical.addKey(Categorical.java:41)
    at water.parser.FVecParseWriter.addStrCol(FVecParseWriter.java:133)
    at water.parser.CsvParser.parseChunk(CsvParser.java:126)
    at water.parser.ParseDataset$MultiFileParseTask$DistributedParse.map(ParseDataset.java:888)
    at water.MRTask.compute2(MRTask.java:637)
    at water.MRTask.compute2(MRTask.java:591)
    at water.MRTask.compute2(MRTask.java:591)
    at water.MRTask.compute2(MRTask.java:591)
    at water.MRTask.compute2(MRTask.java:591)
    at water.MRTask.compute2(MRTask.java:591)
    at water.MRTask.compute2(MRTask.java:591)
    at water.H2O$H2OCountedCompleter.compute1(H2O.java:1258)
    at water.parser.ParseDataset$MultiFileParseTask$DistributedParse$Icer.compute1(ParseDataset$MultiFileParseTask$DistributedParse$Icer.java)
    at water.H2O$H2OCountedCompleter.compute(H2O.java:1254)
    ... 5 more

然而,我尝试使用pandas数据框的第一个 6行来创建H2OFrame,并且进展顺利。

hf1 = h2o.H2OFrame(train1.loc[:6,:])
[out] Parse progress: |█████████████████████████████████████████████████████████| 100%

但是当我尝试超过这6行(例如 7行)时,它会再次失败并显示之前的崩溃信息:

hf1 = h2o.H2OFrame(train1.loc[:7,:])
[out] Parse progress: | (failed)

这有什么不妥?

提前致谢。

佩德罗

1 个答案:

答案 0 :(得分:0)

添加了:

h2o.cluster().shutdown()

并解决了我的问题。可能是错的,但我认为缺少RAM是我的问题,因此关闭前一个集群有帮助。

找出解决我自己问题的方法,但我会把它留在这里,这样我就可以帮助那些可能遇到同样问题的其他人。