buildFdSets: file descriptor out of range
Brandon S. Allbery KF8NH
allbery at ece.cmu.edu
Wed Jul 15 00:16:21 EDT 2009
On Jul 14, 2009, at 21:48 , Kazu Yamamoto (山本和彦) wrote:
> running well at the beginning. But after several hours, it receives an
> error, "buildFdSets: file descriptor out of range".
I believe the runtime uses select(), which has a hard limit (enforced
by the kernel) that the maximum file descriptor id be 1023. (select()
uses bitmasks and there is a limit on the size of a bitmask; see
> - pushes the limit of file descriptors to 65536 with setResourceLimit.
Reduce this to 1024, otherwise the runtime will eventually find itself
dealing with file descriptors beyond the select() limit mentioned
above. Someone with more knowledge of the Haskell runtime will have
to advise as to possible ways around it if you really need more than
1024 file descriptors.
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university KF8NH
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