[R] socket clusters on snow dies easily
rafan at infor.org
Thu Apr 8 18:04:59 CEST 2004
I'm using R 1.8.1 with the lastest snow package on FreeBSD 4.9.
However, when I try to using socket clusters, it's very unstable.
Sometimes it dies half way when I run parSapply(), sometimes
it dies when cluster connection is idle.
I create a socket cluster by following cmd
cl = makeCluster("foo", type = "SOCK", outfile="/tmp/rafanlog");
Then, I just idle in R, and tail -f outfile, I got following:
[... some R msgs ...]
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for a HTML browser interface to help.
Type 'q()' to quit R.
Error in unserialize(node$con) : error reading from connection
after makeCluster() returns, the outfile hangs around the empty lines
above, about 1 minute later, all msg shows up, also it dies.
This is reproducible on my machine. Also, one of my friends also
got this result on Linux machines w/ R 1.8.x.
Is there any one also encounter this problem?
Any comments or suggestion are welcome :)
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