Re: [Question]nfs: never returned delegation

zhangjian (CG)
2026-03-06T02:47:06Z

Hi experts on NFS:

Recently we meet an error:
1.Nfs wait for sunrpc
2.Sunrpc send OPEN message and hang the rpc task onto sunrpc pending queue.
3.Server never reply, and since NFS_CS_NO_RETRANS_TIMEOUT is forced and
connection is ESTABLISHED, task will never be retransmitted.
This cause procedures waiting on this file hang forever.
I know using "umount -f " to kill rpc task works. And the key to the
problem most likely lies in the network layer. But should nfs retransmit
it after waiting for so long?

Wish for reply. Thanks

Zhangjian