Arrange to make the ssh connection passwordless. Do this by copying your
'public key' to the machine that you are trying to connect to. Google will be
your friend in accomplishing this.
It might be that a firewall stands between you and the other machine, or that
the other machine does not allow connections to port 11001. Either way, the
direction toward a solution is to speak with your system administrator. If it
is firewall, then they are unlikely to accommodate you; the strategy is to run
your cluster exclusively on one side of the firewall.
Martin Morgan
________________________________________
From: R-devel [r-devel-boun...@r-project.org] on behalf of Soumen Pal via
R-devel [r-devel@r-project.org]
Sent: Friday, January 15, 2016 2:05 AM
To: r-devel@r-project.org
Subject: [Rd] Error in socketConnection(master, port = port, blocking = TRUE,
open = "a+b", : cannot open the connection
Dear All
I have sucessfully created cluster of four nodes using localhost in my local
machine by executing the following command
> cl<-makePSOCKcluster(c(rep("localhost",4)),outfile='',homogeneous=FALSE,port=11001)
starting worker pid=4271 on localhost:11001 at 12:12:26.164
starting worker pid=4280 on localhost:11001 at 12:12:26.309
starting worker pid=4289 on localhost:11001 at 12:12:26.456
starting worker pid=4298 on localhost:11001 at 12:12:26.604
>
> stopCluster(cl)
Now I am trying to create a cluster of 2 nodes (one in my local machine and
another remote machine) by using "makePSOCKcluster" command. Both machine have
identical settings and connected by SSH. OS is Ubuntu 14.04 LTS & R version
3.2.1. I have executed the follwoing command to create cluster but getting the
following error message and R Session is getting hanged.
cl<-makePSOCKcluster(c(rep("soumen@10.10.2.32",1)),outfile='',homogeneous=FALSE,port=11001)
soumen@10.10.2.32's password:
starting worker pid=2324 on soumen-HP-ProBook-440-G2:11001 at 12:11:59.349
Error in socketConnection(master, port = port, blocking = TRUE, open = "a+b", :
cannot open the connection
Calls: <Anonymous> ... doTryCatch -> recvData -> makeSOCKmaster ->
socketConnection
In addition: Warning message:
In socketConnection(master, port = port, blocking = TRUE, open = "a+b", :
soumen-HP-ProBook-440-G2:11001 cannot be opened
Execution halted
My sessionInfo() is as follwos
sessionInfo()
R version 3.2.1 (2015-06-18)
Platform: x86_64-unknown-linux-gnu (64-bit)
Running under: Ubuntu 14.04.1 LTS
locale:
[1] LC_CTYPE=en_IN LC_NUMERIC=C LC_TIME=en_IN
[4] LC_COLLATE=en_IN LC_MONETARY=en_IN LC_MESSAGES=en_IN
[7] LC_PAPER=en_IN LC_NAME=C LC_ADDRESS=C
[10] LC_TELEPHONE=C LC_MEASUREMENT=en_IN LC_IDENTIFICATION=C
attached base packages:
[1] parallel stats graphics grDevices utils datasets methods
[8] base
I dont know how to solve this problem.Plese help me to solve this problem.
Thanks
Soumen Pal
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