Interrupted system call while cleaning up multicore workers

[wlandau]

Happens for both current CRAN (0.8.4.1) and 36d7861.

options(clustermq.scheduler = "multicore")
w <- clustermq::workers(4)
out <- clustermq::Q(1:4, fun = function(x) x * 2, workers = w)
w$cleanup()
## Submitting 4 worker jobs (ID: 7422) ...
## Running 4 calculations (1 calls/chunk) ...
## Error in rzmq::poll.socket(list(private$socket), list("read"), timeout = timeout) :
##   Interrupted system call
traceback()
## 4: rzmq::poll.socket(list(private$socket), list("read"), timeout = timeout)
## 3: self$receive_data(timeout = 5)
## 2: super$cleanup(quiet = quiet)
## 1: w$cleanup()
sessionInfo()
## R version 3.5.0 (2018-04-23)
## Platform: x86_64-pc-linux-gnu (64-bit)
## Running under: Red Hat Enterprise Linux
## 
## Matrix products: default
## BLAS: CENSORED/R-3.5.0/lib64/R/lib/libRblas.so
## LAPACK: CENSORED/R-3.5.0/lib64/R/lib/libRlapack.so
## 
## locale:
##  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
##  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
##  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
##  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
##  [9] LC_ADDRESS=C               LC_TELEPHONE=C
## [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base
## 
## other attached packages:
## [1] usethis_1.3.0       testthat_2.0.0.9000 devtools_1.13.5
## 
## loaded via a namespace (and not attached):
##  [1] prettyunits_1.0.2  assertthat_0.2.0   digest_0.6.15      crayon_1.3.4
##  [5] withr_2.1.2        R6_2.2.2           backports_1.1.2    magrittr_1.5
##  [9] rlang_0.2.1        progress_1.2.0     hms_0.4.2          parallel_3.5.0
## [13] compiler_3.5.0     pkgconfig_2.0.1    rzmq_0.9.3         memoise_1.1.0
## [17] clustermq_0.8.4.99

[wlandau]

Related: #86

[mschubert]

Related: ropensci/rzmq#37

[mschubert]

@wlandau I think I fixed this, can you check?

[wlandau]

Thanks, Michael! I think I will have time to try again either later tonight or early tomorrow morning.

[wlandau]

Yup, the example runs normally as of bb4477e.

[mschubert]

I'm fairly certain all interrupt-related issues are now fixed with rzmq@signal.

I can no longer reproduce #93 and #97

[wlandau]

Confirmed, I can no longer reproduce #93 or #97 either.