IMHO term CD - "core dump" gets misused for "exception stack trace" quite
often lately. CD happens under certain conditions in *nixes when jvm can't
handle something, resulting in killing the java process and saving the
memory dump to a file. analogous situation under win is "..illegal operation
..blabla.. will be shut down". .
_exceptions_ in jboss are usually seen in a server log and inform on
exceptional situations in the program logic. in certain situations they can
be recovered from.
0.02 cents,
--andrius
----- Original Message -----
From: "Derek Last Name" <[EMAIL PROTECTED]>
To: "jBoss" <[EMAIL PROTECTED]>
Sent: Monday, October 16, 2000 1:57 PM
Subject: RE: [jBoss-User] Core dump: ouch!
> i have some code that will core dump jboss just about
> every time i run it within 5-15 minutes. i call it
> using 4 dos prompts running the same code. the code
> does a ejb create. each dos prompt i run uses 10
> threads, so, i guess im using 40 clients all doing ejb
> creates at the same time. each client does a delete
> all in the table, then does 10 inserts. i have my try
> catch block so that when i get duplicate inserts it
> will ignore the error, and just keep on going. i did
> this since this is the first ejb example i had in my
> book, this is all i have figured out how to do so far,
> and i wanted to test it out under load to see if what
> kind of performance i would get. i am quite
> underwhelmed and disappointed to say the least. maybe
> im doing something wrong in my code. yes, i realize
> most applications wont be doing this sort of load.
> anyways if you want the code let me know. like i said
> everytime i run it, i get a core dump in jboss.
>
>
> --- marc fleury <[EMAIL PROTECTED]> wrote:
> > the only situation where we have seen the core dump
> > is on shutdown where the
> > JVM barfs on a "unexpected thread" bla bla... then
> > the dump goes to file and
> > can be quite high.
> >
> > I have personnaly never seen a CD under any other
> > circumstances (but I stand
> > to be corrected ;-), not even on the heavy heavy
> > loads we are running right
> > now (again 200thread, 150,000 beans all in parallel
> > and stable :)))))
> >
> > marc
> >
> >
> > |-----Original Message-----
> > |From: [EMAIL PROTECTED]
> > |[mailto:[EMAIL PROTECTED]]On Behalf
> > Of Tom Cook
> > |Sent: Friday, October 13, 2000 1:00 AM
> > |To: [EMAIL PROTECTED]
> > |Subject: [jBoss-User] Core dump: ouch!
> > |
> > |
> > |Just a warning:
> > |
> > |Just discovered that, under some circumstances,
> > jBoss running under
> > |Sun's 1.3 release JDK for linux can core dump in a
> > large way (it got
> > |to 116Mb before I killed it). When it's running
> > from an NFS mount
> > |this drags my box to it's knees with network
> > congestion.
> > |
> > |Tom
> > |--
> > |Tom Cook - Software Operations
> > |
> > |"We rarely find that people have good sense unless
> > they agree
> > | with us."
> > | - Francois, Duc de la Rochefoucauld
> > |
> > |LISAsoft Pty Ltd - www.lisa.com.au
> > |
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> > |Wayville, SA, 5034 Sydney, NSW, 2000
> > |
> > |Phone: +61 8 8272 1555 Phone: +61 2 9283 0877
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