kern/88833: NFS mounts stuck

[Roman V. Palagin]

>Number:         88833
>Category:       kern
>Synopsis:       NFS mounts stuck
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Nov 11 10:10:18 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Roman V. Palagin
>Release:        FreeBSD 6.0-20051108-STABLE i386
>Organization:
N/A
>Environment:
System: FreeBSD kreator6.wuppy.net.ru 6.0-20051108-STABLE FreeBSD 6.0-20051108-STABLE #0: Tue Nov 8 12:43:38 UTC 2005 romanp at kreator5.wuppy.net.ru:/usr/obj/u00/sys-releng_6/KREATOR6 i386
NFS server: Solaris 10/IA32

>Description:
Same as described in
http://lists.freebsd.org/pipermail/freebsd-current/2005-November/057815.html

but for "simple" mounts. Solaris NFS server tends to close connection
after some period of inactivity, but FreeBSD NFS client doesn't close
local socket and try to send data over existing half-closed connection.

>How-To-Repeat:

Mount fs via NFS-TCP from Solaris server, wait some time and you
will see connection to server in CLOSE_WAIT state. From now all
ops on mounted fs will stuck.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: