Error in socketConnection(master, port = port, blocking = TRUE, open = "a+b", : cannot open the connection in Stan (from R)

Asked Mar 10 '16 at 04:59

Active Mar 10 '16 at 22:54

Viewed 1,656 times

I am on a Macbook Pro Retina Display from 2012 running El Capitan with 8 cores according to parallel::detectCores(). My firewall is off. I am performing the following call from stan_lmer loaded from the rstanarm package.

hierarchical.model.1 <- stan_lmer(y ~ x1 + (1 | x2) + (1 | x3) +
                            x4 + x5 + x6 + x7 + x8,
                            data = df,
                            cores = NCORES, # NCORES = parallel::detectCores()
                            seed = SEED)

The exact error is:

starting worker pid=12968 on localhost:11058 at 23:51:49.107
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",  :
  localhost:11058 cannot be opened
Execution halted
  C-c C-c

edited Mar 10 '16 at 22:54

syclik

asked Mar 10 '16 at 04:59

Brandon Sherman

I don't know why you are getting that error; it is known to work on newer Macs. If you set `NCORES` to 1, it should run successfully, albeit serially. – Ben Goodrich Mar 10 '16 at 20:38
Right, but if I use one core, that defeats the entire purpose of parallelizing the MCMC. – Brandon Sherman Mar 10 '16 at 20:39
I understand. Can you do any non-rstan example with `parallel::parLapplyLB`? – Ben Goodrich Mar 12 '16 at 00:34
Like what? I've never used that function before. – Brandon Sherman Mar 12 '16 at 01:53
Like `example(parLapplyLB)` – Ben Goodrich Mar 13 '16 at 06:22

Error in socketConnection(master, port = port, blocking = TRUE, open = "a+b", : cannot open the connection in Stan (from R)

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