One thing to try before you kill the: Power cycle the tape drive.
Sometimes it makes those hung processes go away like magic. Sometimes
not. But it's safe and may be worth a shot, as long as the only session
holding the drive is hung.

Conrad Macina
Pfizer, Inc.



-----Original Message-----
From: Keith Roy [mailto:Keith.Roy AT FAIRCHILDSEMI DOT COM] 
Sent: Thursday, November 29, 2007 7:58 AM
Subject: Re: Hanging session

Hi Tim,

We also see the nsrmmd processes hang from time to time, and have a case

opened with EMC to review this as well.  I am not sure which platform
you 
are running on, but when we have this issue on our Solaris ( Unix ) 
Networker server, we use the lsof utility against the tape device  ( 
/usr/local/bin/lsof /dev/rmt/0cbn ) which will return the process id of 
the nsrmmd process.  From this information we can usually do a 'kill 
<pid>' and the nsrmmd daemon restarts.  I know this is not a great 
solution, but it has saved us from restarting the application from time
to 
time.  Your milage will vary.

Keith 





Tim Verbois <Tim.Verbois AT ET.VLAANDEREN DOT BE> 
Sent by: EMC NetWorker discussion <NETWORKER AT listserv.temple DOT edu>
11/29/2007 04:54 AM
Please respond to
EMC NetWorker discussion <NETWORKER AT listserv.temple DOT edu>; Please respond

to
Tim Verbois <Tim.Verbois AT ET.VLAANDEREN DOT BE>


To
NETWORKER AT listserv.temple DOT edu
cc

Subject
[Networker] Hanging session






Hello,

when a sessions dies due to an error it sometimes stays visible in 
nsrwatch.  There is no process connected to it anymore but the session 
blocks a drive (it is backupping to that tape, but no bit is written to 
it).  After a while the session disappears, but that can take hours and 
sometimes, it stays there forever.  The only solution then is to restart

the networker daemons.

Is there a way to kill these sessions without restarting the networker 
daemons??

Tim

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