[Zope-dev] RE: [Zope] Re: Zope hanging (poss. threads-related)

[Tony Rossignol]

More feedback here.  I wasn't sure if this should warrant a new title or
not so I've left it here, for those following the thread.

I have, on occasion, found threads spinning for no apparent reason on
our stable machine.  One theory here is that the older slower machine we
have that does not restart, may actually still be suffering from similar
issues as the other servers but for one reason or another it does not
trigger the restart process or does not get severe enough to restart. 
So when I see a spinner I am starting to pay attention to it.  

Here is some more info:


top -
  8:08am  up 131 days, 20:18,  1 user,  load average: 1.32, 1.28, 1.30
95 processes: 93 sleeping, 2 running, 0 zombie, 0 stopped
CPU states:  0.1% user,  0.0% system,  0.0% nice,  0.0% idle
Mem:  517528K av, 511300K used,   6228K free,  80676K shrd,  10832K buff
Swap: 130748K av,   7068K used, 123680K free                153468K
cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT  LIB %CPU %MEM   TIME
COMMAND
31771 nobody    17   0  110M 110M 18132 R       0 96.7 21.9 537:41
python
 9436 root       7   0   936  936   728 R       0 12.0  0.1   0:00 top
30717 nobody     0   0  207M 207M 18144 S       0  4.3 41.0   7:45
python
30763 nobody     0   0  207M 207M 18144 S       0  3.4 41.0  11:01
python
...

strace -p 31771 - 
close(-1)                               = -1 EBADF (Bad file descriptor)
close(-1)                               = -1 EBADF (Bad file descriptor)
...

I don't know what to make of this but maybe it will help.  During this
time Zope was still able to serve content at almost a normal pace.


-- 
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tonyr@ep.newtimes.com
Director of Web Technology
New Times, Inc.
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