Intriguing.
For a complement of information :
- what is the exact platform ?
- is Tomcat started via jsvc ?
- as a matter of fact, *how* is the main Tomcat being started ?
What does the command netstat -pan | grep LISTEN show when you have such multiple copies
running ?
(the form of the
Am Fri, 09 Sep 2011 11:25:13 +0200
schrieb André Warnier a...@ice-sa.com:
What does the command netstat -pan | grep LISTEN show when you have
such multiple copies running ?
Unfortunately Solaris' netstat doesn't know a option to show listeners.
IIRC there are some scripts in Solaris-world that
Am Fri, 9 Sep 2011 09:54:36 +0100
schrieb Dave Stubbs d...@stubbs.uk.com:
When we list the system tasks we see that the ghost process PPID is
the same as the PID of the still running main tomcat instance. Here
is list of what happened when it wasn't picked up for a while.
Obviously the
2011/9/9 Dave Stubbs d...@stubbs.uk.com:
We are seeing tomcat starting up additional copies of itself, each new copy
is allocating a chunk of storage, it only starts 1 thread, nothing gets
written to any logs and no CPU is being listed as having been used.
(...)
1. It might be an issue with ps
This is on Solaris 10 which doesn't have that issue. Each process is
allocating its own storage so it looks like it's completely separate from
the parent process, threads would share the parents storage space.
No, we definitely aren't starting any additional processes ourselves.
This is happening
I'll get that checked when it next happens (it's doing it daily at the
moment sometime several times).
We've already tried to match the events with the activity on the parent JVM,
haven't found anything yet though (haven't given up on this).
One thing we did notice is higher CPU usage on the
Solaris environment is
SunOS ** 5.10 Generic_127127-11 sun4v sparc
SUNW,SPARC-Enterprise-T5120
System = SunOS
Node = **
Release = 5.10
KernelID = Generic_127127-11
Machine = sun4v
BusType = unknown
Serial = unknown
Users = unknown
OEM# = 0
Origin# = 1
NumCPU = 64
Ok, fishing in the dark really, but trying to accumulate more clues.
What about the other questions (how is Tomcat started) ?
And, looking at your original ps list, some vague thing :
all these ghost processes seem to
a) not be doing much (CPU time 0), even after a long time.
b) all be started
Am Fri, 09 Sep 2011 14:34:44 +0200
schrieb André Warnier a...@ice-sa.com:
As an alternative to netstat under Solaris, there is the lsof
utility.
AFAIK there is no lsof in (standard-) Solaris-10. But maybe one can
take it from independent repositories like Sunfreeware
The tomcat service is managed by the Solaris service management system (I
can see references to svcs in their start-up/shutdown logs (it's on a
customer's site so I'm not 100% on how it's configured).
I should say there are 2 other tomcat instances all being managed the same
way and they don't
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