Question

我在Ubuntu上使用R，我想使用CoreNLP包，我有一个奇怪的行为。当我使用shell时，一切都很好，例如我可以运行：

$ R

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[Previously saved workspace restored]

> library(rjava)
Error in library(rjava) : there is no package called ‘rjava’
> library(rJava)
> library(coreNLP)
> initCoreNLP()
Searching for resource: config.properties
Adding annotator tokenize
TokenizerAnnotator: No tokenizer type provided. Defaulting to PTBTokenizer.
Adding annotator ssplit
Adding annotator pos
Reading POS tagger model from edu/stanford/nlp/models/pos-tagger/english-left3words/english-left3words-distsim.tagger ... done [2.4 sec].
Adding annotator lemma
Adding annotator ner
Loading classifier from edu/stanford/nlp/models/ner/english.all.3class.distsim.crf.ser.gz ... done [6.1 sec].
Loading classifier from edu/stanford/nlp/models/ner/english.muc.7class.distsim.crf.ser.gz ... done [4.1 sec].
Loading classifier from edu/stanford/nlp/models/ner/english.conll.4class.distsim.crf.ser.gz ... done [3.3 sec].
Initializing JollyDayHoliday for SUTime from classpath: edu/stanford/nlp/models/sutime/jollyday/Holidays_sutime.xml as sutime.binder.1.
Reading TokensRegex rules from edu/stanford/nlp/models/sutime/defs.sutime.txt
Reading TokensRegex rules from edu/stanford/nlp/models/sutime/english.sutime.txt
Reading TokensRegex rules from edu/stanford/nlp/models/sutime/english.holidays.sutime.txt
Adding annotator parse
Loading parser from serialized file edu/stanford/nlp/models/lexparser/englishPCFG.ser.gz ... done [4.1 sec].
Adding annotator dcoref
Adding annotator sentiment
> library(rJava)
> .jinit()
[1] 0
> .jcall("java/lang/System","S","getProperty","java.version")
[1] "1.8.0_91"
>

但如果我在同一台计算机上使用RStudio Server，使用相同的用户，我会得到：

> library(rJava)
> library(coreNLP)
> initCoreNLP()
Error in rJava::.jnew("edu.stanford.nlp.pipeline.StanfordCoreNLP", basename(path)) : 
  java.lang.UnsupportedClassVersionError: edu/stanford/nlp/pipeline/StanfordCoreNLP : Unsupported major.minor version 52.0
> .jinit()
[1] 0
> .jcall("java/lang/System","S","getProperty","java.version")
[1] "1.7.0_67"

首先，这在终端或RStudio Server中都无效。为了使它在终端中工作，我按照以下步骤操作：

我从http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html下载了Java，即jdk-8u91-linux-x64.tar.gz文件。
在/usr/lib/jvm/jdk1.8.0_91中解压缩
最后运行sudo JAVA_HOME=/usr/lib/jvm/jdk1.8.0_91 R CMD javareconf

所以，我无法理解为什么它在终端中工作但在RStudio Server中不起作用。似乎RStudio Server无法加载正确的Java，有谁知道为什么？

非常感谢您的宝贵意见。

一切顺利

奥古斯丁

Answer 1

您可能想要询问RStudio支持。 R脚本正在为Java设置环境，所以我的猜测是RStudio服务器无法做到这一点。我不知道你是如何开始的，但你可以通过引导R脚本获得更多运气，例如

R CMD <command to start the server>

R中的CoreNLP在RStudio中不起作用，但在shell

1 个答案: