I am trying to use the parallel package, and found that makeCluster
hangs (and no apparent actions have taken place). This is Windows7-64,
"Enterprise", R 3.0.1 .
I've traced the hang to the following line in newPSOCKnode :
con <- socketConnection("localhost", port = port, server = TRUE,
blocking = TRUE, open = "a+b", timeout = timeout)
That command stalls. My suspicion is this is due to some "overzealous IT
rules" laid down on our work computers, but would welcome any
suggestions as to how to trace (and fix) the source of the problem.
While in debug mode, I did a dump just before the socketConnection call:
Browse[3]> ls.str()
arg : chr "parallel:::.slaveRSOCK()"
cmd : chr
"\"C:/Users/carl.witthoft/Documents/R/R-3.0.1/bin/x64/Rscript\"
-e
\"parallel:::.slaveRSOCK()\" MASTER=localhost PORT=11017 OUT="|
__truncated__
env : chr "MASTER=localhost PORT=11017 OUT=/dev/null TIMEOUT=2592000
METHODS=TRUE XDR=TRUE"
machine : chr "localhost"
manual : logi FALSE
master : chr "localhost"
methods : logi TRUE
options : <environment: 0x000000000ccac6a0>
outfile : chr "/dev/null"
port : int 11017
rank : int 1
renice : int NA
rscript : chr
"\"C:/Users/carl.witthoft/Documents/R/R-3.0.1/bin/x64/Rscript\""
timeout : num 2592000
useXDR : logi TRUE
Other possibly useful info:
I opened a shell and ran
netsh advfirewall firewall add rule name="Open Port 11017" dir=in
action=allow protocol=TCP localport=11017
and got an "OK" response. I ran netstat -a -n and found the following
line:
TCP 0.0.0.0:11017 0.0.0.0:0 LISTENING
But running makePSOCKcluster still hangs at the same place.
NEXT: I tried running R from the command line (via cygwin bash), and the
error message I get is
Error in loadhistory(file) : no history mechanism available Execution
halted
, after which ctrl-C returns me to the R-prompt.
--
Sent from a parallel universe almost, but not entirely,
nothing at all like this one.