Hi,
We have following setup:
mongos :1
config server :3
mongod (shards):10
all shards are journal enabled.
Every shard have 1.5 tb Disk space.
We make 365 days database.

Get error logs "too many opens files".

After some time of above log we check following:

1> ulimit -n is 35000
2> lsof | wc -l is 7343.
3> lsof | grep mongod | wc -l is 3455.

Why did error "too many opens files" come??

Kindly help me.

Regards,
JRV

We check
ulimit -n
all shards are journal enabled.

Mongod1 become non-responsive. Logs show error "too many opens files".