Too many open files (os error 24), already used ulimit -n 1048576

[potato1992]

I used ulimit -n 1048576 before runing lotus miner, and cat /proc/[miner ppid]/limits shows:

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             1288223              1288223              processes 
Max open files            1048576              1048576              files     
Max locked memory         67108864             67108864             bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       1288223              1288223              signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us 

However, I still see errors like this:

2022-01-26T07:43:30.820+0800	ERROR	storageminer	storage/wdpost_run.go:105	runPoStCycle failed: running window post failed:
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runPoStCycle
        /home/deci/Downloads/lotus_build/lotus_mainnet/storage/wdpost_run.go:693
  - generate_window_post: merkle_tree failed: SectorId(10826)
    
    Caused by:
        Too many open files (os error 24)
    github.com/filecoin-project/filecoin-ffi.GenerateWindowPoSt
    	/home/deci/Downloads/lotus_build/lotus_mainnet/extern/filecoin-ffi/proofs.go:684
    github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper.(*Sealer).GenerateWindowPoSt
    	/home/deci/Downloads/lotus_build/lotus_mainnet/extern/sector-storage/ffiwrapper/verifier_cgo.go:46
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runPoStCycle
    	/home/deci/Downloads/lotus_build/lotus_mainnet/storage/wdpost_run.go:639
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).runGeneratePoST
    	/home/deci/Downloads/lotus_build/lotus_mainnet/storage/wdpost_run.go:103
    github.com/filecoin-project/lotus/storage.(*WindowPoStScheduler).startGeneratePoST.func1
    	/home/deci/Downloads/lotus_build/lotus_mainnet/storage/wdpost_run.go:87
    runtime.goexit
    	/usr/local/go/src/runtime/asm_amd64.s:1371

Is there any other things I should do concerning this?

[potato1992]

Found the reason, the disk is mount by samba, I should also increase the file limit of the samba in the storage machine as well.

[LexLuthr]

I am archiving this discussion as the problem has already been rectified.