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Subject: RETomcat Load Balancing
Date: Thu, 23 Dec 2010 18:51:30 +0800
Message-ID: <E8080B001767C74CBD0336E18FE8746D2EF680@SGSIEXC018.nsn-intra.net>
In-Reply-To: <AANLkTi=OYFj2XWDqk2F1+7BF86BSuyN0zp_RhOyNX-vK@mail.gmail.com>
Thread-Topic: RETomcat Load Balancing
Thread-Index: AcuiiIUGLpyg6nRHTM6Nt9xEcCF3YQABkE8A
References: 
 <AANLkTik0x8gbA-wcWb1WSV0MABY6_83U7cipyhFtj8Aw@mail.gmail.com><4D131463.4050900@ice-sa.com>
 <AANLkTi=OYFj2XWDqk2F1+7BF86BSuyN0zp_RhOyNX-vK@mail.gmail.com>
From: "Singh, Harsimranjit (NSN - IN/Bangalore)" <harsimranjit.singh@nsn.com>
To: "Tomcat Users List" <users@tomcat.apache.org>


 Hi=20

I am able to test load balancing and clustering with multiple tomcat =
instances using rule.xml.but when tomcat balancer redirect requests to =
tomcat cluster instance ist displays port of tomcat cluster.So am not =
able redirection display clearly details of new tomcate

How I can resolve it!


Thanks


-----Original Message-----
From: ext Adib [mailto:amslist@gmail.com]=20
Sent: Thursday, December 23, 2010 3:32 PM
To: Tomcat Users List
Subject: Re: Problem connecting to tomcat6 service via JConsole on =
Windows Server 2008

The local process option seems to be a hit and miss on various versions =
of
windows, it was not working. Also the local process option only works if
jconsole is running the same userid as process you want to connect to, =
which
is not the case in my tomcat setup which is running as a service.

I tested my setup on my Vista 64 bit laptop an it worked which narrowed =
the
problem down to something about Windows Server 2008 R2.

A bit more googling led me this problem repot
http://tai-dev.blog.co.uk/2010/03/26/glassfish-jmx-and-windows-web-server=
-2008-can-play-together-with-a-few-tweaks-here-s-how-plus-bonus-jconsole-=
config-info-8251001/

and the fix was to add -Djava.rmi.server.hostname=3D127.0.0.1 to my =
command
line options for the service. I have no idea why this setting fixes the
problem but it does.

Has anyone found any good documentation on how JVM instrumentation works =
and
why it is so troublesome to connect to an instrumented hotspot vm.


On Thu, Dec 23, 2010 at 1:20 AM, Andr=E9 Warnier <aw@ice-sa.com> wrote:

> Shortly :
> If you are local, then you can use the "Local process" option in =
jconsole.
>
> Otherwise : as far as I remember, the jmx connection really uses 2 =
ports,
> not only the one you obviously connect to. And that second port is =
random,
> which is what makes it difficult to connect through a firewall or so.
> Maybe it is that second port that is blocked in your case ?
> Have another look with tcpview while you are trying to connect, if you =
do
> not see some new  LISTEN port appear during the connection attempt.
>
>
>
> Adib wrote:
>
>> Hi,
>>
>> I am having a problem connecting to Tomcat 6 running as a service on
>> Windows
>> Server 2008 R2. Here are the details of my setup.
>>
>> 32 Bit JDK 1.6._23
>> 64 Bit Windows Server 2008 R2
>>
>> My jakarta service log shows that I am setting the jvm properties to =
turn
>> on
>> jmx remote access to the JVM
>>
>> [2010-12-22 23:22:21] [447  javajni.c] [debug] Jvm Option[6]
>> -Dcom.sun.management.jmxremote
>> [2010-12-22 23:22:21] [447  javajni.c] [debug] Jvm Option[7]
>> -Dcom.sun.management.jmxremote.port=3D8999
>> [2010-12-22 23:22:21] [447  javajni.c] [debug] Jvm Option[8]
>> -Dcom.sun.management.jmxremote.ssl=3Dfalse
>> [2010-12-22 23:22:21] [447  javajni.c] [debug] Jvm Option[9]
>> -Dcom.sun.management.jmxremote.authenticate=3Dfalse
>>
>> I am running jconsole on the same machine that is running tomcat so I =
am
>> not
>> trying to connect remotely and should
>> not have any problems with ports I even turned off the windows =
firewall on
>> the machine to make sure it was not getting
>> in the way
>>
>> systernals tcpview shows that tomact6.exe is listening on port 8999
>>
>> I am running tomact6 service as the user pmtomact
>>
>> I am running jconsole as the user Administrator
>>
>> on the jconsole I tried localhost:8999 and it tries to connect for a =
while
>> then reports that it can can not connect.
>>
>> I tried running tomcat as user administrator just starting from the
>> startup.bat with the proper jmx paramters and it does not work =
either.
>>
>> I tried running jconsole as pmtomcat user still no luck connecting
>>
>> I tried creating a directory under
>> C:\Users\pmtomcat\AppData\Local\Temp\hsperfdata_pmtomcat and checked =
that
>> the directory was writable by the pmtomcat user still it does not =
work.
>>
>> Any ideas of how I can troubleshoot this problem, it is driving me =
crazy?
>>
>>
>
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