I am trying to do parallel work in R using snow. I could perform very similar tasks without problems in older versions of R and snow. R packets do not allow me to return.
What happens: My tasks are completed in steps parRapply, i.e. the first time the nodes are supposed to do anything other than reports Sys.info(). Error message:
Error in checkForRemoteErrors(val) :
3 nodes produced errors; first error: cannot open the connection
Calls: parRapply ... clusterApply -> staticClusterApply -> checkForRemoteErrors
Features: R 2.14.0, snow 0.3-8, RedHat Enterprise Linux Client 5.6 release. The snow pack is built on the correct version of R.
Details: The
following code will appear:
cl <- makeCluster(3)
clusterEvalQ(cl,library(deSolve,lib="~/R/library"))
clusterCall(cl,function() Sys.info()[c("nodename","machine")])
I am an end user, not a system administrator, but I desperately need advice and considerations on what might be wrong.