centos7 Rstudio png("test.png") : failed to load cairo DLL

Question

在安装R之前已经安装一下依赖

yum install cairo cairo-devel cairomm-devel libjpeg-turbo libjpeg-turbo-devel pango pango-devel pangomm pangomm-devel libtiff libtiff-devel  libXt libXt-devel libpng libpng-devel

> sessionInfo()
R version 3.5.2 (2018-12-20)
Platform: x86_64-redhat-linux-gnu (64-bit)
Running under: CentOS Linux 7 (Core)

Matrix products: default
BLAS/LAPACK: /usr/lib64/R/lib/libRblas.so

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

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

other attached packages:
[1] ggplot2_3.1.1

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.1       withr_2.1.2      assertthat_0.2.1 crayon_1.3.4     dplyr_0.8.0.1    R6_2.4.0        
 [7] grid_3.5.2       plyr_1.8.4       gtable_0.3.0     magrittr_1.5     scales_1.0.0     pillar_1.3.1    
[13] rlang_0.3.4      lazyeval_0.2.2   rstudioapi_0.10  tools_3.5.2      glue_1.3.1       purrr_0.3.2     
[19] munsell_0.5.0    compiler_3.5.2   pkgconfig_2.0.2  colorspace_1.4-1 tidyselect_0.2.5 tibble_2.1.1 

> capabilities()
       jpeg         png        tiff       tcltk         X11        aqua    http/ftp     sockets      libxml 
       TRUE        TRUE        TRUE        TRUE       FALSE       FALSE        TRUE        TRUE        TRUE 
       fifo      cledit       iconv         NLS     profmem       cairo         ICU long.double     libcurl 
       TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE        TRUE 
Warning message:
In doTryCatch(return(expr), name, parentenv, handler) :
  unable to load shared object '/usr/lib64/R/modules//R_X11.so':
  /usr/lib64/libcairo.so.2: undefined symbol: FT_Get_Var_Design_Coordinates

ggplot2等无法作图

> library(ggplot2)
> ggplot(mtcars, aes(factor(cyl), mpg)) + geom_violin(aes(fill = cyl))
Error in RStudioGD() : 
  Shadow graphics device error: r error 4 (R code execution error)
In addition: There were 50 or more warnings (use warnings() to see the first 50)
> warnings()
Warning messages:
1: In grDevices:::png("/tmp/RtmpqJD7g6/2c22d9968be54dd48ead81d0a29fa0f2.png",  ... :
  failed to load cairo DLL
2: In grDevices:::png("/tmp/RtmpqJD7g6/3802e757470f48c8a14ab91ea2c99c54.png",  ... :
  failed to load cairo DLL

Google搜索好久还是没有得到解决，有空的大神帮忙看一下可能是哪里的问题，谢谢:

Answer 1

重启一下 rsession 应该就行了，提示找不到 DLL，可能是 对应的环境变量没有更新过来。