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RE: [cdt-dev] How to investigate "Too many open files" error?

If you are running on linux you can try valgrind with '--track-fds=yes' option, it will show all open files and location in code.

> To: cdt-dev@xxxxxxxxxxx
> From: frank.theinen@xxxxxxxxx
> Date: Fri, 2 Jul 2010 11:44:17 +0200
> Subject: [cdt-dev] How to investigate "Too many open files" error?
> Hi,
> I already asked for advice on the Platform and CDT newsgroups to no avail,
> so I think I have to bother you here. :-)
> I'm using eclipse-cpp-helios-linux-gtk.tar.gz (and formerly
> eclipse-cpp-galileo-SR2-linux-gtk.tar.gz) which (amongst others) contains
> the Eclipse Platform, the C/C++ IDE and the Mylin components. I'm
> experiencing "Too many open files" errors (details follow below) and I'm
> looking for a way to investigate further. Since I cannot tell which
> component creates the problem I'm seeking your advice here. If there is a
> place more appropriate where to ask please direct me to it.
> After running for a few days the java process - which is only used by
> Eclipse - exhausts the allowed number of open files per process ('ulimit
> -Hn', 8192). From that time on Eclipse is unable to sensibly 'work' much
> longer and creates "Too many open files" errors in all components used.
> Using 'lsof | grep java' (last line shown here)
> java 15330 ftheinen 8191r REG 0,3 0 8804280 /proc/15330/maps
> shows that about 8000 of the open file descriptors are read accesses to
> the process memory map file (lines differ in the file descriptor only).
> Using 'lsof' from time to time shows that the number of file descriptors
> increases steadily, maybe one or two per minute on average, until reaching
> 8191.
> How can I systematically investigate which component is creating these
> file descriptors (without having to do many time consuming experiments)?
> Regards, Frank
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> cdt-dev@xxxxxxxxxxx

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