One additional restriction I have is a security bureaucracy from hell.
As far as console access I have a two-hop connection. As far as GUI
access I have some crappy device to log into that lets me have really
bad keyboard/mouse control of the machine, which, unless I can overcome
this means that GUI-based tools are not going to work, and as for remote
GUI access, see above security bureaucracy.
Which means I'm looking for command-line equivalents for what JConsole
does, particularly the threads tab. Any ideas along that path?
Pieter Temmerman wrote:
Hi Steve,
Some great tools to monitor your Tomcat installations are:
- Jconsole (make sure you get the topthreads plugin)
- VisualVM
- VisualGC
- Jmap
Hope that helps.
On Tue, 2009-02-03 at 09:31 -0600, Steve Cohen wrote:
We have an application that runs under Tomcat under RHEL 5.0 and is
launched by a jsvc daemon.
It chugs along seemingly fine on several servers, yet yesterday crashed
on one of them with the above exception seemingly without experiencing
any kind of abnormal load. I am trying to get a handle on this.
System is
$ uname -a
Linux 2.6.18-92.1.22.el5 #1 SMP Fri Dec 5 09:29:46 EST 2008 i686 i686
i386 GNU/Linux
Java version:
java -version
java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b02)
Java HotSpot(TM) Client VM (build 1.5.0_16-b02, mixed mode, sharing)
no special JVM memory settings are used when launching tomcat, just the
default memory allocations. I have read in some places that this
particular form of OutOfMemoryError is actually made worse by increasing
the memory size.
I need to deploy some thread and memory monitoring setup to get a handle
on this.
Can someone suggest a path forward here?
Thanks.
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