From goldberg@homebrew.cs.ubc.ca  Fri Aug 30 19:02:40 1996
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Date: Fri, 30 Aug 1996 19:02:37 -0700
From: goldberg@cs.ubc.ca
Reply-To: goldberg@cs.ubc.ca
To: FreeBSD-gnats-submit@freebsd.org
Subject: kern
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>Number:         1555
>Category:       kern
>Synopsis:       nfsd send error 55
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    wollman
>State:          closed
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Aug 30 19:10:01 PDT 1996
>Closed-Date:    Thu Sep 26 17:11:57 PDT 1996
>Last-Modified:  Thu Sep 26 17:12:44 PDT 1996
>Originator:     Murray W. Goldberg
>Release:        FreeBSD 2.1-STABLE i386
>Organization:
------------------------------
Murray W. Goldberg, Instructor
Dept. of Computer Science, University of British Columbia
2366 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z4
(604) 822-3153, goldberg@cs.ubc.ca
>Environment:
FreeBSD homebrew.cs.ubc.ca 2.1.0-RELEASE FreeBSD 2.1.0-RELEASE #0: Wed Aug 28 21:34:16 PDT 1996     goldberg@homebrew.cs.ubc.ca:/usr/src/sys/compile/MURRAY  i386


>Description:

Repeated messages of the form:
Aug 22 07:27:53 homebrew /kernel: nfsd send error 55
Aug 23 07:16:49 homebrew /kernel: nfsd send error 55
Aug 23 07:17:04 homebrew /kernel: nfsd send error 55
Aug 23 07:23:25 homebrew /kernel: nfsd send error 55
Aug 24 07:11:22 homebrew /kernel: nfsd send error 55

As you can see they come is small clumps and are not that frequent.
They normally come at that time of the day. The only thing I can think of unique 
about 7:00am is that a tape backup of an NFS mounted filesystem is finishing sometime
around then (it begins at 2:00am).

This problem first appeared when I updated the H/W config from a P-166, 64meg, to
a Pentium-Pro 200, 128meg. Nothing else changed.


>How-To-Repeat:

	

>Fix:
	
	

>Release-Note:
>Audit-Trail:

From: Garrett Wollman <wollman@lcs.mit.edu>
To: goldberg@cs.ubc.ca
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: kern/1555: kern
Date: Mon, 2 Sep 1996 13:24:28 -0400

 <<On Fri, 30 Aug 1996 19:02:37 -0700, goldberg@cs.ubc.ca said:
 
 > Aug 22 07:27:53 homebrew /kernel: nfsd send error 55
 > Aug 23 07:16:49 homebrew /kernel: nfsd send error 55
 
 Error number 55 is ENOBUFS, ``No buffer space available''.  There are
 a number of possible causes for this error:
 
 1) Your machine is out of mbufs.  Recompile with more.
 
 2) Your network interface is hosed.  Sometimes, if bad things happen
 inside a driver, output packet processing can come to a halt without
 the kernel knowing about it; if this happens when the queue is full,
 it will get stuck.  (I used to see this one a lot when working on my
 experimental polling code.)
 
 3) Your network interface is really busy.  If the messages come only
 intermittently, this is the most likely cause.
 
 -GAWollman
 
 --
 Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
 wollman@lcs.mit.edu  | O Siem / The fires of freedom 
 Opinions not those of| Dance in the burning flame
 MIT, LCS, ANA, or NSA|                     - Susan Aglukark and Chad Irschick
State-Changed-From-To: open->analyzed 
State-Changed-By: wosch 
State-Changed-When: Thu Sep 26 17:07:01 PDT 1996 
State-Changed-Why:  

Analyzed by Garrett 




Responsible-Changed-From-To: freebsd-bugs->wollman 
Responsible-Changed-By: wosch 
Responsible-Changed-When: Thu Sep 26 17:07:01 PDT 1996 
Responsible-Changed-Why:  
State-Changed-From-To: analyzed->closed 
State-Changed-By: wollman 
State-Changed-When: Thu Sep 26 17:11:57 PDT 1996 
State-Changed-Why:  
Transient, self-correcting error. 
>Unformatted:
Murray W. Goldberg
