R help - Jan 2025 - Regarding Issue Running Parallel Computing on Linux RHEL version 8

Hi Team,

I am writing to bring to your attention an issue we have encountered following
the recent update of our Linux server from RHEL 7 to RHEL 8. We have an R script
designed to create demand forecasts utilizing parallel computing on the Linux
server.

Before the version update, the script executed successfully within approximately
two hours. However, since updating to RHEL 8, the script has been hanging and
not completing its execution even after running for 17 hours.

Here are some details about the problem:

Script Purpose: Demand forecasting using parallel computing.
Previous Environment: Linux server version RHEL 7.
Current Environment: Linux server version RHEL 8.
Issue Observed: The script hangs and does not complete execution post-update.
Previously, it took around two hours; now it runs for over 17 hours without
finishing.
We need assistance in diagnosing and resolving this issue as soon as possible. I
will share detailed logs and any other necessary information upon request.

List of libraries used as below.
  library(foreach)
  library(parallel)
  library(parallelly)
  library(forecast)
  library(tseries)
  library(prophet)
  library(lubridate)
  library(tis)
  library(tsoutliers)


Thanks,
Sadam


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Dear Sadam,

? Mon, 13 Jan 2025 14:34:20 +0000
"Huseni, Sadamhusen" <Sadamhusen.Huseni at genpact.com> ?????:
> Issue Observed: The script hangs and does not complete execution
> post-update. Previously, it took around two hours; now it runs for
> over 17 hours without finishing.
Do you still have the RHEL 7 machine? Could you please share the
sessionInfo() output at least from the RHEL 8 machine but, if possible,
also from the RHEL 7 machine?
>   library(foreach)
>   library(parallel)
>   library(parallelly)
>   library(forecast)
>   library(tseries)
>   library(prophet)
>   library(lubridate)
>   library(tis)
>   library(tsoutliers)
Could you identify and share the parts of the script that launch the
computation in parallel?

-- 
Best regards,
Ivan