Hello!
Nfs4 client randomly hangs on a file or directory (for instance when
performing df or find) and after a few seconds continues. When
preforming strace, it hangs on getdents system call.
Errors on the server side:
Aug 19 21:29:08 host kernel: nfs: server host2 not responding, still trying
Aug 19 21:31:17 host kernel: nfs: server host2 OK
After a while the load on client and server side increases intensively,
then system on the client side crashes. Reboot required.
We use SL6.3, the same problem occurred on the following kernels:
2.6.32-220.17.1.el6.x86_64
2.6.32-279.2.1.el6.x86_64
and also on:
3.5.2-1.el6.elrepo.x86_64
3.3.2-1.el6.elrepo.x86_64
The only difference is that when we are using 3.x kernel from elrepo,
the system crash never appears, just client hangs.
Mount options:
Flags:
rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,noresvport,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=IP,local_lock=none,addr=IP
Nfs utils version:
nfs-utils-1.2.3-15.el6_2.1.x86_64
Any ideas?
Thanks,
Barbara
