09-08-2009
Your server is part of an HACMP cluster that uses heartbeats to detect all nodes are alive. The error messages tells you that one of those heartbeats is not working properly because of high (CPU) load. You said that you use 70% of the server's paging space. If this paging space is on rootvg and if rootvg disks are 100% busy during paging space usage that is the likely cause for heartbeat pakets getting lost. So the second relevant part of the error message is the hint about excessive disk I/O which is causing high memory contention
You don't not to worry as long as at least one heartbeat keeps on working. However make sure that the paging space is not being used frequently! You DB has grown over the time and you may need to get more RAM for the (all) cluster nodes
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LEARN ABOUT REDHAT
nwauth
NWAUTH(1) nwauth NWAUTH(1)
NAME
nwauth - Verify username/password
SYNOPSIS
nwauth [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -D ]
DESCRIPTION
nwauth does nothing but logging into a NetWare server. If the login was successful, an error code of 0 is returned. If the login was not
successful, an error code of 1 is returned. It was designed for use by other programs who want authenticate users via a NetWare server.
If there is no -P or -n option specified on command line, nwauth always expects a password on stdin. If the stdin is a tty, then the user
is prompted for a password. Otherwise nwauth simply reads stdin for a password.
nwauth looks up the file $HOME/.nwclient to find a file server and a user name if they are not specified on command line. See nwclient(5)
for more information. Please note that the access permissions of .nwclient MUST be 600, for security reasons.
OPTIONS
-h
-h is used to print a short help text.
-S server
server is the name of the server you want to use.
-U user name
If the user name your NetWare administrator gave to you differs from your unix user-id, you should use -U to tell the server about your
NetWare user name.
-D
nwauth says that your password is correct if you have existing connection to server with name user name. This is handy for some shell
scripts, but it is unacceptable for authorization modules, such as PAM, PHP or Apache. It was pointed to me that this behavior was not
well known, and there exist at least one PAM module which does not know that (this module is not part of ncpfs; you should use PAM mod-
ule which comes with ncpfs instead anyway).
SEE ALSO
nwclient(5)
CREDITS
nwauth was written by Volker Lendecke (lendecke@math.uni-goettingen.de)
nwauth 10/27/1996 NWAUTH(1)