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2014 May 21
2
issue with parallel package
...ite a lot. library(parallel) for (n in 1:1000) { p <- mcparallel(sqrt(n)) res <- mccollect(p, wait=FALSE, timeout=1000) mccollect(p) if (is.null(res)) cat(n," NULL!\n") } It does not happen in R-3.0.3. (To be exact, I have checked out R-devel revision r65130 for my current tests.) I found that this behavior is introduced in revision r65143. When I insert Sys.sleep(0.1) in the loop then this behavior disappears in R-3.1.0. There is also another difference between R-3.1.0 and R-3.0.3: When the line mccollect(p) is replaced by mccollect(p, wa...