It looks like rstan does not support running in multiple Rserve sessions simultaneously. From the Rserve client I created 2 threads each working on a specific section of data over a specific Rserve session to the same Ubuntu (16.04.1LTS). As you can see below one of them failed with error message “Error in readRDS(file) : error reading from connection” right after the c++ code was compiled. It seems that the two session is trying to compete with the same file in the file system, so only one of them can get it locking everyone else out. The R version is 3.4.1 and rstan is 2.16.2.

Any suggestions?

Operating System: Ubuntu

Interface Version: 2.16.2

Output of writeLines(readLines(file.path(Sys.getenv(“HOME”), “.R/Makevars”))):

Output of devtools::session_info("rstan”):

///////////////////////////////////////////////////////////////////////////

Loading required package: ggplot2

Loading required package: StanHeaders

Loading required package: StanHeaders

rstan (Version 2.16.2, packaged: 2017-07-03 09:24:58 UTC, GitRev: 2e1f913d3ca3)

For execution on a local, multicore CPU with excess RAM we recommend calling

rstan_options(auto_write = TRUE)

options(mc.cores = parallel::detectCores())

rstan (Version 2.16.2, packaged: 2017-07-03 09:24:58 UTC, GitRev: 2e1f913d3ca3)

For execution on a local, multicore CPU with excess RAM we recommend calling

rstan_options(auto_write = TRUE)

options(mc.cores = parallel::detectCores())

DIAGNOSTIC(S) FROM PARSER:DIAGNOSTIC(S) FROM PARSER:

Warning (non-fatal):

Left-hand side of sampling statement (~) may contain a non-linear transform of a parameter or local variable.

If it does, you need to include a target += statement with the log absolute determinant of the Jacobian of the transform.

Left-hand-side of sampling statement:

e ~ student_t(…)

Warning (non-fatal):

Left-hand side of sampling statement (~) may contain a non-linear transform of a parameter or local variable.

If it does, you need to include a target += statement with the log absolute determinant of the Jacobian of the transform.

Left-hand-side of sampling statement:

e ~ student_t(…)

In file included from /usr/local/lib/R/site-library/BH/include/boost/config.hpp:39:0,

from /usr/local/lib/R/site-library/BH/include/boost/math/tools/config.hpp:13,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core/var.hpp:7,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core/gevv_vvv_vari.hpp:5,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core.hpp:12,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/mat.hpp:4,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math.hpp:4,

from /usr/local/lib/R/site-library/StanHeaders/include/src/stan/model/model_header.hpp:4,

from file35c7ed5684b.cpp:8:

/usr/local/lib/R/site-library/BH/include/boost/config/compiler/gcc.hpp:186:0: warning: “BOOST_NO_CXX11_RVALUE_REFERENCES” redefined

# define BOOST_NO_CXX11_RVALUE_REFERENCES

^

:0:0: note: this is the location of the previous definition

In file included from /usr/local/lib/R/site-library/BH/include/boost/config.hpp:39:0,

from /usr/local/lib/R/site-library/BH/include/boost/math/tools/config.hpp:13,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core/var.hpp:7,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core/gevv_vvv_vari.hpp:5,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/core.hpp:12,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math/rev/mat.hpp:4,

from /usr/local/lib/R/site-library/StanHeaders/include/stan/math.hpp:4,

from /usr/local/lib/R/site-library/StanHeaders/include/src/stan/model/model_header.hpp:4,

from file35d7bf9aac4.cpp:8:

/usr/local/lib/R/site-library/BH/include/boost/config/compiler/gcc.hpp:186:0: warning: “BOOST_NO_CXX11_RVALUE_REFERENCES” redefined

# define BOOST_NO_CXX11_RVALUE_REFERENCES

^

:0:0: note: this is the location of the previous definition

Error in readRDS(file) : error reading from connection

SAMPLING FOR MODEL ‘634840b083abed8af10db9ed0d88ab99’ NOW (CHAIN 1).

Gradient evaluation took 0.000329 seconds

1000 transitions using 10 leapfrog steps per transition would take 3.29 seconds.

Adjust your expectations accordingly!

Iteration: 1 / 3000 [ 0%] (Warmup)

SAMPLING FOR MODEL ‘634840b083abed8af10db9ed0d88ab99’ NOW (CHAIN 2).

Gradient evaluation took 0.000307 seconds

1000 transitions using 10 leapfrog steps per transition would take 3.07 seconds.

Adjust your expectations accordingly!

Iteration: 1 / 3000 [ 0%] (Warmup)

SAMPLING FOR MODEL ‘634840b083abed8af10db9ed0d88ab99’ NOW (CHAIN 3).

Gradient evaluation took 0.000322 seconds

1000 transitions using 10 leapfrog steps per transition would take 3.22 seconds.

Adjust your expectations accordingly!

Iteration: 1 / 3000 [ 0%] (Warmup)

SAMPLING FOR MODEL ‘634840b083abed8af10db9ed0d88ab99’ NOW (CHAIN 4).

Gradient evaluation took 0.000307 seconds

1000 transitions using 10 leapfrog steps per transition would take 3.07 seconds.

Adjust your expectations accordingly!

Iteration: 1 / 3000 [ 0%] (Warmup)

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Error in extract(fit, “omega”) : object ‘fit’ not found

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Elapsed Time: 5.97196 seconds (Warm-up)

6.57777 seconds (Sampling)

12.5497 seconds (Total)

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Elapsed Time: 6.91391 seconds (Warm-up)

6.22381 seconds (Sampling)

13.1377 seconds (Total)

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Elapsed Time: 7.14996 seconds (Warm-up)

6.55966 seconds (Sampling)

13.7096 seconds (Total)

Iteration: 3000 / 3000 [100%] (Sampling)

Elapsed Time: 6.35933 seconds (Warm-up)

6.61689 seconds (Sampling)

12.9762 seconds (Total)