4:59 a.m.
We are trying to figure out the hard limit for the FD, does nfs ganesha
impose a limit?
At the moment we are seeing these errors:
25/07/2019 19:27:59 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[cache_lru]
lru_run :INODE LRU :WARN :Futility count exceeded. Client load is opening
FDs faster than the LRU thread can close them.
25/07/2019 19:28:16 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[cache_lru]
lru_run :INODE LRU :WARN :Futility count exceeded. Client load is opening
FDs faster than the LRU thread can close them.
25/07/2019 19:28:34 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[svc_54]
mdcache_lru_fds_available :INODE LRU :CRIT :FD Hard Limit Exceeded, waking
LRU thread.
25/07/2019 19:29:02 : epoch 5d393d8c : nas : ganesha.nfsd-1681[svc_64]
mdcache_lru_fds_available :INODE LRU :CRIT :FD Hard Limit Exceeded, waking
LRU thread.
The system limit:
$ cat /proc/sys/fs/nr_open
2097152
And the limit for nfs-ganesha process:
$ cat /proc/1681/limits
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 385977 385977
processes
Max open files 2097152 2097152 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 385977 385977 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
And the number of open files is
# ls /proc/1681/fd | wc -w
12739
I don't see why we are hitting the FD limit as we only have 12739 FD count.
It is impacting the NFS clients right now, file creation is fine but can't
open an existing file to write.
I'm using VFS FSAL, and the software versions are:
nfs-ganesha-2.7.5-1.el7.x86_64
nfs-ganesha-vfs-2.7.5-1.el7.x86_64
Thanks.
Gin