[EMAIL PROTECTED](Herbert Xu) wrote:
> We have an Java application here that uses around 3000 file
> descriptors at once.
> Unfortunately, the
> JVM (117) under Linux is trying to select over >1024 file descriptors, which
> is causing a core dump.
I think that it is a wrong behavior to cause a core
dump, but the limitation results from your kernel.
In /usr/include/linux/posix_types.h,
/*
* This allows for 1024 file descriptors: if NR_OPEN is ever grown
* beyond that you'll have to change this too. But 1024 fd's seem to be
* enough even for such "real" unices like OSF/1, so hopefully this is
* one limit that doesn't have to be changed [again].
(stuff deleted)
#define __FD_SETSIZE 1024
and in /usr/include/linux/limits.h,
#define NR_OPEN 256
Stuffs above limits the number of descriptors a process
and select(2) can handle. You may be able to get more
descriptors by increasing these numbers and re-compiling
your kernel.
Kazuyuki SHUDO Happy Hacking!
Muraoka Lab., Grad. School of Sci. & Eng., Waseda Univ.
