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65143
2014 May 21
2
issue with parallel package
...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, wait=FALSE, timeout=1000)
then in R-3.1.0 some child processes are not terminated and s...