Re: Definitely a bug in locking.

[Mark Burgess]

Can you try the latest snapshot/subversion version. There is a locking
fix in that.

M

On Fri, 2005-03-18 at 09:43 -0500, Baker, Darryl wrote:
> One of my co-workers dug in a bit deeper into our problems last night and
> found:
> 
> Solaris 8 and 9 on SPARC using a few days old snap-shot. Berkeley DB=3.3 
> 
> I ran cfagent in all-out debug mode (-d2)  on asgqd545 and noticed from the
> trace below. This was repeated for all of the 'copy' actions that should
> have occurred. Note the 'IfElapsed' parameter to GetLock. Now note the third
> line. I dug up the doc on IfElapsed, and discovered that it is intended to
> assure that cfengine can't run off and insanely start copying everything at
> full tilt. I set "IfElapsed = ( 0 )" in cf.main and the file copies went
> right through. 
> 
> I have managed to prove that my C is hopelessly rusty, but I'm 99% certain
> that the bug is somewhere in lines 212-257 of locks.c. I know that because
> the variable 'operand' goes null in there somehow (!) and results in that
> third line of debug not having what it should. (Line 212 sets the first
> line, 257 sets the last, and 'operand' goes missing in there.... just
> wrong...) 
> 
> 
> 
> ExpandVarstring(sysadm05.abh.vw.com)
> ExpandVarstring(/var/cfengine/master/etc/sudoers)
> ExpandVarstring(/usr/local/etc/sudoers)
> Checking copy from sysadm05.abh.vw.com:/var/cfengine/master/etc/sudoers to
> /usr/local/etc/sudoers
> ExpandVarstring(sysadm05.abh.vw.com)
> Server connection to sysadm05.abh.vw.com already open on 4
> Authentic connection verified
> cf_rstat(/var/cfengine/master/etc/sudoers)
> GetCachedStatData(/var/cfengine/master/etc/sudoers)
> Did not find in cache
> Transaction Send[t 54][Packed text]
> Attempting to send 62 bytes
> SendSocketStream, sent 62
> RecvSocketStream(8)
>     (Concatenated 8 from stream)
> Transaction Receive [t 74][]
> RecvSocketStream(74)
>     (Concatenated 74 from stream)
> Mode = 288,0
> OK: type=0
>  mode=440
>  lmode=0
>  uid=0
>  gid=0
>  size=22418
>  atime=1111154948
>  mtime=1111103746 ino=281856 nlnk=1, dev=22282242
> RecvSocketStream(8)
>     (Concatenated 8 from stream)
> Transaction Receive [t 3][]
> RecvSocketStream(3)
>     (Concatenated 3 from stream)
> Linkbuffer: OK:
> GetLock(copy,_var_cfengine_master_etc_sudoers__usr_local_etc_sudoers_sysadm0
> 5_abh_vw_com,time=1111156198), ExpireAfter=60, IfElapsed=1
> GetLastLock()
> cfengine:asgqd545: Nothing scheduled for copy. (0/1 minutes elapsed)
> 
> _____________________________________________________________________
> Darryl Baker
> gedas USA, Inc.
> Operational Services Business Unit
> 3800 Hamlin Road
> Auburn Hills, MI 48326
> US
> phone +1-248-754-5341
> fax   +1-248-754-6399
> address@hidden
> http://www.gedasusa.com
> _____________________________________________________________________
>  
> >  
>  <<Baker, Darryl.vcf>> 
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