Can't execute logadm proberly

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Operating Systems Solaris Can't execute logadm proberly
# 1  
Old 07-28-2015
Can't execute logadm proberly


I am trying to rotate my logs using logadm, so I did the following
logadm -w /traces/mylogs.out -C 5 -p 1d -o user -g group -m 644 -c -t '/traces/mylogs.out.$n' -z 1

and then tried to test it by logadm -v and it gets stuck at truncation step
# processing logname: /traces/mylogs.out
mkdir -p /traces # verify directory exists
# log rotation via atomic copy and truncation (-c flag):
# copy /traces/mylogs.out to /traces/mylogs.out.0
# truncate /traces/mylogs.out


I actually had to stop its processing because it took longer time and can see it eats my diskspace by creating a file with blank lines
# du -sh mylogs.out*
  76M   mylogs.out
  29G   mylogs.out.0

when I checked mylogs.out.0, I found it is just full of blank lines which I don't understand why!
Could you please advise in this?


Last edited by Don Cragun; 07-28-2015 at 10:57 PM.. Reason: Add CODE and ICODE tags.
# 2  
Old 07-29-2015
This User Gave Thanks to DukeNuke2 For This Post:
# 3  
Old 07-29-2015
I believe that I followed the exact instructions there, still not working Smilie

---------- Post updated at 07:43 PM ---------- Previous update was at 04:21 PM ----------

I noticed also something in the logs permission -rw-r-lr--
What does ( l ) in the middle mean here? I am not sure if this is because of my action?
# 4  
Old 08-19-2015
Normally you do not need -o user -g group -m 644 because it picks the attributes from the logfile.
(The same feature was in the Linux logrotate, until they found a security bug in connection with its globbing feature.)
To your problem:
according to man ls the l or L means "mandatory locking" and can indeed cause a problem, e.g. logadm or cp waits until the lock is released.
Can you manually cp the logfile?
# 5  
Old 08-19-2015
Thanks for the notes Smilie Good to know that!
The problem is solved after restarting the process to force recreating the log in a clean manner.
It looks that my intervention to free it by redirecting /dev/null to it, caused this issue I think!
Anyway after removing it and starting the process, I was able to apply logadm on it with no problem using the same command.

# 6  
Old 08-20-2015
Sometimes the better alternative is to not use the -c option,
instead signal the process to close/open its logfile by means of the -a option.
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