>Number:         29911
>Category:       kern
>Synopsis:       nfsd sometimes return mysterious EACCES
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 07 03:09:00 +0000 2005
>Originator:     YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
>Release:        NetBSD 3.99.3
>Organization:

>Environment:
	
	
System: NetBSD kaeru 3.99.3 NetBSD 3.99.3 (build.kaeru.nodebug) #37: Wed Apr 6 16:40:24 JST 2005 takashi@kaeru:/home/takashi/work/kernel/build.kaeru.nodebug i386
Architecture: i386
Machine: i386
>Description:
	i observed that my nfsd sometimes returns EACCES or EIO
	without any obvious reasons.  i guess EIO was mapped from
	EACCES by nfsrv_errmap.

	i vaguely doubt that someone unexport the filesystem temporarily
	(eg. sending SIGHUP to mountd, like mount(8)),
	but there were no other activities on the server and
	i couldn't find a culprit.

	i have seen the same symptom with 3.99.2.

	i have a packet capture taken on the server.
	ftp://ftp.netbsd.org/pub/NetBSD/misc/yamt/XXX00000726.gz
	(see frame #193356-#193536.  the client is linux 2.6.8.1.
	broken checksums are due to h/w offloading.)
>How-To-Repeat:
	
>Fix:
	

>Unformatted: