Hello All,
For one of our client, using nfs-ganesha v2.4 and ceph v10.2.4, readdir fails
with error:
On nfs-client: "Remote I/O error"
In nfs-ganesha server log (Removed some part of readability)
mdcache_readdir :NFS READDIR :F_DBG :About to readdir in mdcache_readdir:
directory=0x1f8dc10 cookie=0 collisions 0
mdcache_getattrs :INODE :F_DBG :attrs obj attributes Mask = 0005dfce
NO_FILE_TYPE
Encode FAILED for attr 1, name = FATTR4_TYPE
NFS READDIR :F_DBG :Returning NFS4ERR_SERVERFAULT
But for the same directory=0x1f8dc10 , readdir works sometime.
In the log, it prints the correct attr "nfs4_FSALattr_To_Fattr :NFS4 :F_DBG
:Encoded attr 1, name = FATTR4_TYPE"
Could
there be a possible race condition somewhere in accessing mdcache,
because of which for the same directory it works sometime?
I have not been able to reproduce it. Looking at code, it seems somehow mdcache
and attributes are not in sync.
Client is also using cephfs cache tiering, but I think that should not have any
effect on nfs-ganesha mdcache.
Any hints on how to debug it further?
Thanks,
Supriti
------
Supriti Singh��SUSE Linux GmbH, GF: Felix Imend��rffer, Jane Smithard, Graham
Norton,
HRB 21284 (AG N��rnberg)
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