On our RHEL servers I've been noticing a lot of:

Failed to merge ... 
{{badmatch,{error,system_limit}},[{bitcask,scan_key_files,3},{bitcask,'merge1',3},{bitcask_merge_worker,do_merge,1}]}

This is a RHEL 6 / Riak 1.0 test cluster which has Riak running as root.  I 
have not noticed this at all on our production 0.14.2 FreeBSD cluster.

My ulimit -a output is as follows:

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 127400
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 40560
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 1024
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

An lsof -p shows open files of around 3 - 5k during the merge and about 1,300 
post fail.  Anybody have an idea what system limit I may be hitting?

Thanks!

TJ
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