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From Steve Nelson <Steve.Nel...@ided.state.ia.us>
Subject RE: tomcat 5.0.16 Replication
Date Wed, 07 Jan 2004 22:16:30 GMT

Ends up doing the same thing.

The variable was set. I checked it with an echo.



-----Original Message-----
From: Filip Hanik [mailto:devlists@hanik.com]
Sent: Wednesday, January 07, 2004 4:05 PM
To: Tomcat Users List
Subject: RE: tomcat 5.0.16 Replication


you should do

export LD_ASSUME_KERNEL=2.4.1

not

export set LD_ASSUME_KERNEL=2.4.1

in regular bash shell

-----Original Message-----
From: Steve Nelson [mailto:Steve.Nelson@ided.state.ia.us]
Sent: Wednesday, January 07, 2004 1:38 PM
To: 'Tomcat Users List'
Subject: RE: tomcat 5.0.16 Replication



Heh, now I am replying to myself :P

I tried
export set LD_ASSUME_KERNEL=2.4.1
No change in Behaviour
then I tried
export set LD_ASSUME_KERNEL=2.2.5
again, no change.

I restarted both servers between runs. I still get the CPU going crazy
Scenario.

-Steve

-----Original Message-----
From: Steve Nelson [mailto:Steve.Nelson@ided.state.ia.us]
Sent: Wednesday, January 07, 2004 3:03 PM
To: 'Tomcat Users List'
Subject: RE: tomcat 5.0.16 Replication




Okay, I reverted back to the 5.0.16 version and now I don't have the high
CPU ute.
But it takes almost 60 seconds for the Manager to request the session state.
Which
causes it to fail to synch about half the time.

Must be something in the Synch code. Which comes back to your original
comments about the NIO stuff and RH9 not liking Java in general. Is there a
known fix for making things right with RH9? I could try that.

-Steve



-----Original Message-----
From: Steve Nelson [mailto:Steve.Nelson@ided.state.ia.us]
Sent: Wednesday, January 07, 2004 2:53 PM
To: 'Tomcat Users List'
Subject: RE: tomcat 5.0.16 Replication



Yep, also happens when I use asynch. I couldn't get the profiling files to
load on the machine I am using right now, when I get back to the servers
I'll
try to figure out what is eating up all the CPU....although TOP tells me
arround
30% of the ute is system level as opposed the the java executable. Sounds
like
alot of the load may be in system calls.

-Steve


-----Original Message-----
From: Filip Hanik [mailto:devlists@hanik.com]
Sent: Wednesday, January 07, 2004 2:47 PM
To: Tomcat Users List
Subject: RE: tomcat 5.0.16 Replication


I'll try to get an instance going today. Will let you know how it goes
also, try asynchronous replication, does it still go to 100%?

Filip

-----Original Message-----
From: Steve Nelson [mailto:Steve.Nelson@ided.state.ia.us]
Sent: Wednesday, January 07, 2004 12:08 PM
To: 'Tomcat Users List'
Subject: RE: tomcat 5.0.16 Replication




Okay, did that got this

BEGIN TO RECEIVE
SENT:Default 1
RECEIVED:Default 1 FROM /10.0.0.110:5555
SENT:Default 2
BEGIN TO RECEIVE
RECEIVED:Default 2 FROM /10.0.0.110:5555
SENT:Default 3
BEGIN TO RECEIVE
RECEIVED:Default 3 FROM /10.0.0.110:5555
SENT:Default 4
BEGIN TO RECEIVE
RECEIVED:Default 4 FROM /10.0.0.110:5555

*shrug*

BTW It didn't go to 100% CPU ute before I started using the code from CVS.
Of course the Manager would almost always timeout before it would recieve
the message.

Now it gets the message right away, but maxes my machine out.




-----Original Message-----
From: Filip Hanik [mailto:devlists@hanik.com]
Sent: Wednesday, January 07, 2004 1:58 PM
To: Tomcat Users List
Subject: RE: tomcat 5.0.16 Replication


100% cpu can mean that you have a multicast problem, try to run

java -cp tomcat-replication.jar MCaster

download the jar from http://cvs.apache.org/~fhanik/

Filip

-----Original Message-----
From: Steve Nelson [mailto:Steve.Nelson@ided.state.ia.us]
Sent: Wednesday, January 07, 2004 6:51 AM
To: 'tomcat-user@jakarta.apache.org'
Subject: tomcat 5.0.16 Replication



I was having random problems with clustering when starting up. Mostly it had
to do with Timing out
when the manager was starting up. I built the CVS version and it solved that
problem. But it has caused
some serious performance problems.

First a little background.

I have 2 servers, dual 300mhz cpq proliants, both running Redhat - 9, Tomcat
5.0.16 (with catalina-cluster.jar build from cvs) The multicast packets are
restricted to a crossover link between the servers. There are 3 hosts in the
server.xml, all with clustering set up. They all function just fine.

But.....the cpu's spikes up to 100% if I start up both servers. I know this
didn't happen without the new catalina-cluster.jar. If I shut down 1 server
(doesn't matter which) everything returns to normal. But when both are
running both servers are at 100% CPU. I am trying to profile it now, but I
figured if someone has already experienced this they could save me some
time.

Oh, and there isn't anything relevant in my logs. It's not throwing millions
of errors or something.

-Steve Nelson



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