RStudio "Unable to connect to service" after R upgrade to Oracle Distribution R-3.4.4

[aparnak]

Hi,

We are getting the following error on RStudio Server browser, after upgrading Oracle Distribution R in Oracle Red Hat Linux from R-3.3.0 to R-3.4.4 :
"Unable to connect to service"

On re-installing latest RStudio Server version rpm, got the following error :

useradd: user 'rstudio-server' already exists

groupadd: group 'rstudio-server' already exists

rstudio-server start/running, process [48350]

[root ~]# rstudio-server verify-installation

Server is running and must be stopped before running verify-installation

[root ~]# rstudio-server stop

rstudio-server stop/waiting

rsession: no process killed

[root ~]# rstudio-server verify-installation

/usr/lib/rstudio-server/bin/rsession: error while loading shared libraries: libpcre.so.1: cannot open shared object file: No such file or directory

sessionInfo()

Oracle Distribution of R version 3.4.4 (--)

Platform: x86_64-pc-linux-gnu (64-bit)

Running under: Oracle Linux Server 6.9

Matrix products: default

BLAS/LAPACK: /usr/lib64/R/lib/libOrdBlasLoader.so

locale:

[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C

[3] 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

[7] LC_PAPER=en_US.UTF-8 LC_NAME=C

[9] LC_ADDRESS=C LC_TELEPHONE=C

[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:

[1] stats graphics grDevices utils datasets methods base

loaded via a namespace (and not attached):

[1] compiler_3.4.4

On executing 'which R' we get the output '/usr/bin/R', however the installation directory of R is /usr/lib64/R on our system.

We have tried setting the following option in .bashrc and .bash_profile files:
export RSTUDIO_WHICH_R=/usr/lib64/R
but that didn't help.

Please advise. It's a Production environment.

Thank you.

[kevinushey]

@aparnak

/usr/lib/rstudio-server/bin/rsession: error while loading shared libraries: libpcre.so.1: cannot open shared object file: No such file or directory

This error implies that the R session is requesting the library libpcre.so.1, but it is either not available or could not be found. Can you double-check that this library is installed?

[aparnak]

We had copied it to the required directory and the issue got resolved. Thank you!

[andresrcs]

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