On 02/29/2012 04:17 PM, J. Bruce Fields wrote:
On Wed, Feb 29, 2012 at 03:29:36PM -0700, Orion Poplawski wrote:
Just starting today, one of our user's nfs mounted home directory
has started locking up. Client is Fedora 16 32-bit, server is
CentOS 5.7 32-bit. Have not seen this particular problem elsewhere
(yet).
I captured this trace on the server after the hang:
http://sw.cora.nwra.com/tmp/marie-nfs-home-lwang-hang.pcap
1 0.000000 10.10.20.15 -> 10.10.10.1 NFS V4 COMP Call<EMPTY>
PUTFH;GETATTR GETATTR
2 0.000133 10.10.10.1 -> 10.10.20.15 NFS V4 COMP Reply (Call
In 1)<EMPTY> PUTFH;GETATTR GETATTR
3 0.000421 10.10.20.15 -> 10.10.10.1 TCP 879> nfs [ACK]
Seq=137 Ack=225 Win=17738 Len=0 TSV=3584653 TSER=2438333196
4 0.000519 10.10.20.15 -> 10.10.10.1 NFS V4 COMP Call<EMPTY>
PUTFH;ACCESS ACCESS;GETATTR GETATTR
5 0.000587 10.10.10.1 -> 10.10.20.15 NFS V4 COMP Reply (Call
In 4)<EMPTY> PUTFH;ACCESS ACCESS;GETATTR GETATTR[Unreassembled
Packet [incorrect TCP checksum]]
6 0.040522 10.10.20.15 -> 10.10.10.1 TCP 879> nfs [ACK]
Seq=289 Ack=465 Win=17738 Len=0 TSV=3584694 TSER=2438333196
7 0.451636 10.10.20.15 -> 10.10.10.1 NFS V4 COMP Call<EMPTY>
PUTFH;SAVEFH SAVEFH;OPEN OPEN;DELEGRETURN DELEGRETURN;Unknown
That looks weird. Looking at the pcap--ok, the "delegreturn" is a
mistake, there's no delegreturn there.
8 0.451892 10.10.10.1 -> 10.10.20.15 NFS V4 COMP Reply (Call
In 7)<EMPTY> PUTFH;SAVEFH SAVEFH;OPEN OPEN(10008)
That probably means the server is waiting for the client to return a
delegation.
Either the server's confused about their being a delegation, or the
client's failing to return one it should?
--b.
All way over my head. Any way to check in more detail?
thanks.
--
Orion Poplawski
Technical Manager 303-415-9701 x222
NWRA, Boulder Office FAX: 303-415-9702
3380 Mitchell Lane orion@xxxxxxxxxxxxx
Boulder, CO 80301 http://www.cora.nwra.com
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