为什么连接终止 [英] Why connection is terminating

问题描述

我正在R上使用H2O库尝试随机森林分类模型，该库位于具有7000万行和25个数字特征的训练集上，文件总大小为5.6 GB.

I'm trying a random forest classification model by using H2O library inside R on a training set having 70 million rows and 25 numeric features.The total file size is 5.6 GB.

验证文件的大小为1 GB.

The validation file's size is 1 GB.

我的系统上有16 GB RAM和8核心CPU.

I have 16 GB RAM and 8 core CPU on my system.

系统成功读取了H2O对象中的两个文件.

The system successfully able to read both of the files in H2O object.

然后我在下面给出命令来构建模型:

Then I'm giving below command to build the model:

model <- h2o.randomForest(x = c(1:18,20:25), y = 19, training_frame = traindata, 
                          validation_frame = testdata, ntrees = 150, mtries = 6)

但是几分钟(没有生成任何树)之后，出现以下错误:

But after few minutes (without generating any tree), I'm getting following error:

.h2o.doSafeREST中的错误(conn = conn，h2oRestApiVersion = h2oRestApiVersion ，:意外的CURL错误:Recv失败:对等重置连接"

"Error in .h2o.doSafeREST(conn = conn, h2oRestApiVersion = h2oRestApiVersion, : Unexpected CURL error: Recv failure: Connection reset by peer"

但是，如果我尝试将以上代码与1棵树一起使用，则其运行成功.

However If I tried above code with 1 tree, its running successfully.

是否由于内存问题而发生上述错误?任何帮助将不胜感激.

Is the above error occurring because of memory issue? Any help will be appreciated.

推荐答案

它是OutOfMemoryError.在R端此错误消息的变体是:

Its an OutOfMemoryError. A variation of this error message on the R side is:

Error in .h2o.doSafeREST(conn = conn, h2oRestApiVersion = h2oRestApiVersion,  : 
  Unexpected CURL error: Empty reply from server

检查h2o服务器日志(您也应该这样做)会告诉您:

Checking the h2o server logs, which you should do as well, will tell you:

10-08 20:11:57.165 192.168.0.4:54321     2125   #58072-18 INFO: Total file size: 1.81 GB
10-08 20:11:57.165 192.168.0.4:54321     2125   #58072-18 INFO: Parse chunk size 4194304
        onExCompletion for water.parser.ParseDataset$MultiFileParseTask@3588360e
        java.lang.OutOfMemoryError: Java heap space
:
:
Exception in thread "FJ-0-11" java.lang.OutOfMemoryError: Java heap space
2015-10-08 20:13:14.493:WARN:oejut.QueuedThreadPool:1 threads could not be stopped
10-08 20:13:23.033 192.168.0.4:54321     2125   FJ-0-5    ERRR: Out of Memory, Heap Space exceeded, increase Heap Size, from /192.168.0.4:54321
10-08 20:13:23.458 192.168.0.4:54321     2125   FJ-0-3    ERRR: Out of Memory, Heap Space exceeded, increase Heap Size, from /192.168.0.4:54321
10-08 20:13:23.033 192.168.0.4:54321     2125   FJ-0-13   ERRR: Out of Memory, Heap Space exceeded, increase Heap Size, from /192.168.0.4:54321
10-08 20:13:23.033 192.168.0.4:54321     2125   FJ-0-7    ERRR: Out of Memory, Heap Space exceeded, increase Heap Size, from /192.168.0.4:54321
10-08 20:13:26.541 192.168.0.4:54321     2125   FJ-0-5    FATAL: Exiting.
10-08 20:13:26.574 192.168.0.4:54321     2125   FJ-0-7    FATAL: Exiting.
10-08 20:13:26.575 192.168.0.4:54321     2125   FJ-0-3    FATAL: Exiting.
10-08 20:13:26.575 192.168.0.4:54321     2125   FJ-0-13   FATAL: Exiting.

我正在h2o Slater(3.2.0.5)上运行此程序，因此，这可能取决于您的版本.

I am running this on h2o Slater (3.2.0.5), so depending on your version, this may vary.

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