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074919
2018 Jun 21
1
DOCUMENTATION(?): parallel::mcparallel() gives various types of "Error in unserialize(r) : ..." errors if value is of type raw
...cause the above appears to corrupt the R session)
f <- parallel::mcparallel(raw(2L))
parallel::mccollect(f)
# Error in unserialize(r) : unknown input format
I can reproduce this on Linux using R 3.5.0 all the way back to R
3.3.2 (didn't try further) and R development (unstable) (2018-06-19
r74919).
Diving into the code of parallel::mccollect(), it looks that the 'raw'
data type has a special purpose:
r <- readChild(pid)
if (is.integer(r) || is.null(r))
fin[pid == pids] <- TRUE
if (is.raw(r))...