Question

我有一个包＆＃34; javaOnLoadFailed＆＃34; （只是用于测试我的问题的最小包，因此奇怪的名称）导入rJava。我得到了＆＃39; rJava＆＃39;当我尝试check（）或install（）包时出错，即使require（rJava）本身工作正常。

install（）会出现以下错误：

> install()
Installing javaOnloadFailed
"C:/Program Files/R/R-3.2.0/bin/x64/R" --no-site-file --no-environ --no-save  \
--no-restore CMD INSTALL  \
"C:/Projects/stackoverflow/javaOnloadFailed/javaOnLoadFailed"  \
--library="C:/Users/adb2018/Documents/R/win-library/3.2" --with-keep.source  \
--install-tests 

* installing *source* package 'javaOnloadFailed' ...
** R
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
*** arch - i386
Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object 'C:/Users/adb2018/Documents/R/win-library/3.2/rJava/libs/i386/rJava.dll':
  LoadLibrary failure:  %1 is not a valid Win32 application.

Error: loading failed
Execution halted
*** arch - x64
ERROR: loading failed for 'i386'
* removing 'C:/Users/adb2018/Documents/R/win-library/3.2/javaOnloadFailed'
Error: Command failed (1)

我在Architect中使用R 3.2.0，使用sessionInfo（）：

R version 3.2.0 (2015-04-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] devtools_1.7.0.9000 rj_2.0.3-2         

loaded via a namespace (and not attached):
[1] tools_3.2.0   rj.gd_2.0.0-1

Answer 1

Java环境变量为空

> Sys.getenv('JAVA')
[1] ""

基于suggestion，我尝试将JAVA环境变量设置为指向64位版本的Java（因为我正在运行R 64位，正如您可以从sessionInfo中看到的那样，但是它没有＆＃39工作：

> Sys.setenv(JAVA_HOME='C:\\Program Files\\Java\\jre1.8.0_45')
> install()
Installing javaOnloadFailed
"C:/Program Files/R/R-3.2.0/bin/x64/R" --no-site-file --no-environ --no-save  \
  --no-restore CMD INSTALL  \
  "C:/Projects/stackoverflow/javaOnloadFailed/javaOnLoadFailed"  \
  --library="C:/Users/adb2018/Documents/R/win-library/3.2" --with-keep.source  \
  --install-tests 

* installing *source* package 'javaOnloadFailed' ...
** R
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
*** arch - i386
Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object 'C:/Users/adb2018/Documents/R/win-library/3.2/rJava/libs/i386/rJava.dll':
  LoadLibrary failure:  %1 is not a valid Win32 application.

Error: loading failed
Execution halted
*** arch - x64
ERROR: loading failed for 'i386'
* removing 'C:/Users/adb2018/Documents/R/win-library/3.2/javaOnloadFailed'
Error: Command failed (1)

然后我尝试设置JAVA环境变量，使其指向我系统上的32位版本的Java，然后它就可以了！

> Sys.setenv(JAVA_HOME='C:\\Program Files (x86)\\Java\\jre1.8.0_45\\')
> install()
Installing javaOnloadFailed
"C:/Program Files/R/R-3.2.0/bin/x64/R" --no-site-file --no-environ --no-save  \
  --no-restore CMD INSTALL  \
  "C:/Projects/stackoverflow/javaOnloadFailed/javaOnLoadFailed"  \
  --library="C:/Users/adb2018/Documents/R/win-library/3.2" --with-keep.source  \
  --install-tests 

* installing *source* package 'javaOnloadFailed' ...
** R
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
*** arch - i386
*** arch - x64
* DONE (javaOnloadFailed)

[INFO] Updating the R environment index started...

[INFO] The R environment index was updated successfully.

我不太明白为什么我需要指向Java 32位以使R 64位工作，但这似乎就是这种情况。

顺便说一下，不要绊倒我的包裹名称＆＃34; javaOnLoadFailed＆＃34;。我刚刚创建了一个带有该名称的最小包来测试问题。

Answer 2

许多软件包因安装失败而无法在i386平台上运行，但标准安装过程会尝试这样做。用户在jvm.dll和PATH以及JAVA_HOME上浪费了大量时间，当真正的修复是强制安装时忘记i386。使用install.packages选项。（这在使用drat库时也有效。（归功于Dason）

install.packages("SqlRender",INSTALL_opts="--no-multiarch")

Answer 3

记住问题是R不知道jvm.dll在哪里。设置JAVA_HOME时，请使用包含dll文件的目录的路径。您可以在bin\client或bin\server中找到它。然后该命令变为：

Sys.setenv(JAVA_HOME='C:\\Program Files\\Java\\jre1.8.0_45\\bin\\client')

Answer 4

我尝试删除JAVA_HOME系统变量，它可以工作。这样，当您启动R时，Sys.getenv("JAVA_HOME")会给您""。

Answer 5

尝试安装仅在Github中可用的软件包时，我发现了相同的问题。
这为我解决了：

devtools::install_github("snowflakedb/dplyr-snowflakedb", INSTALL_opts=c("--no-multiarch"))

.onLoad在loadNamespace（）中失败，对于＆＃39; rJava＆＃39;安装包时

5 个答案: