[Sheepdog] continuing - too many open files

[Piavlo]

 Hi,
I've just tested with todays next branch and there are still fd leak
problems.

3 node cluster with --copies=2

fire-srv3 ~ # qemu-img convert -f raw -O sheepdog  /dev/sys/kvm-img
pacemaker1.dmz.cs.bgu.ac.il
sd_claim 1215: pacemaker1.dmz.cs.bgu.ac.il
aio_read_response 757: Unknown error
aio_read_response 803:
fire-srv3 ~ #

no  errors in the logs
but again only the node on which qemu-img was invoked has a collie with 
too many open sockets:

fire-srv3 ~ # lsof -p 26405 | awk '$4 ~ /u$/' | wc -l
1023
fire-srv3 ~ # lsof -p 26405 | awk '$5 ~ /^sock$/' | wc -l
1015
fire-srv3 ~ #         


after the error above 'sheepdog info -t sheep' shows only two nodes

fire-srv3 ~ # shepherd info -t sheep
Id      Size    Used    Use%
 0      14G     0G        0%
 1      14G     0G        0%

Total   29G     0G        0%, total virtual VDI Size    5G
fire-srv3 ~ #    

 fire-srv3 ~ # shepherd info -t dog
  Idx   Node id (FNV-1a)    - Host:Port
--------------------------------------------------
  0     32a99c29ef252f1b - 132.72.46.5:7000
* 1     8b457eac187d670d - 132.72.46.3:7000
  2     aa0d7fe04eb122b6 - 132.72.46.4:7000
fire-srv3 ~ #    

 Alex