Failover is not working in clustering

we installed infrastructure in the one system and added 2 instances app1.mycompany.com,app2.mycompany.com into it.
for loadbalancing we r using webcache.
we configured origin servers,site definitions,site-server mappings.
in the cluster two instances showing up.
that we can see in health monitor in Up/Down* parameter of web cache administrator console.
we deployed same ear in two instances.
but when i down one instance say app1.mycompany.com,
In the health monitor its not showing up DOWN parameter for host: app1.mycompany.com.same for UP also.
immediately its not showing changes when i am testing failover.
Is webcache loadbalancing is Round robin based ?
when i down one of the instances session replication is not happening properly.sometimes session expired is coming.
when 2 instances r up if user access application all the requests r coming to one instance if down that instance session expired is coming.
i think failover is not working in clustering.
i checked replication properties and added <distributable> tag in both the instances.
in webcache console page what will sessionbinding will do?i have not configured anything.

Why are you using Webcache?
Web cache will certainly work, but its more common role is to more access as a simple load balancer over HTTP servers, not OC4J instances.
What I'd do is to simplify your situation to verify you have the server setup correctly.
That means using the Oracle HTTP Server which will be part of your cluster as the common routing point. OHS and mod_oc4j are session state aware and know about all the OC4J instances. In the situation where an OC4J instance dies for some reason, mod_oc4j will know to which other OC4J instance(s) the request can be routed to pickup the replicated session state.
Once you have verified that the failover is working on the backend, you can then configure another OHS instance and position webcache in front of them to act as a request router and failover handler for when the OHS instances are inactive.
The Enterprise Deployment Guide offers some guidance in typical architectures, well worth a read.
cheers
-steve-

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Exchange 2010 DAG Failover does not works

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Hi,
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Belinda Ma
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I forgot to say, we are using WLS8.1 SP1
          "Pete Inman" <[email protected]> wrote in message
          news:[email protected]...
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          > news:[email protected]...
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          > > > We have set up a JMS bridge between WLS7SP3 and WLS8.1. It works very
          > well in
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          work
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          > > > please help!
          > > >
          > > > Thanks.
          > >
          >
          >

NXT Flatten to String Not Working with Clusters and Arrays

Hello,
My name is Joshua and I am from the FIRST Tech Challenge Team 4318, Green Machine. We are trying to write a program that will write to a configuration file and read it back. The idea is that we will be able to write to a config file from our computer that will be read by our autonomous program when it runs. This will define what the autonomous program does.
The easiest way to do this seems to be flattening a data structure to a string, saving it to a file, and then reading back and unflattening it. The issue is that the flatten to string and unflatten from string VIs don't seem to work with arrays and clusters on the NXT. It does work when running on the computer. We've tried arrays, clusters, clusters in arrays and arrays in clusters, none seem to work. Thinking it was something to do with reading the string from a file, we tried bypassing the file functionality, still not working. It does work with basic data types though, such as strings and numbers.
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The program attached is a test program I've been working on to get this functionality to work. It will display the hex content of what is going into the file, coming out of the file, and then the resulting data from the unflatten string, as well as any errors that have been thrown. The data type we are using simulates what we would like to store. There is also a file length in and out counter. The out file is a little larger because the NXT write file VI adds a new line character on to the end (thus the use of the strip white space VI). This character was corrupting even basic data types saved to file.
I would like to know if there is a problem with what we are doing, or if it is simply not possible to flatten arrays on the NXT. Please ask if you have any questions about the code. Thank you in advanced!
Joshua
Attachments:
ReadableTest.vi ‏20 KB

Hi jfireball,
This is a very interesting situation. Take a look at what kbbersch said. I also urge you to post in the FTC Forums. You posted your question to the general LabVIEW forums, but by posting to the FTC Forums, you will have access to others that are using the NXT hardware.
David B.
Applications Engineer
National Instruments

Ip SLA failover config not working need help urgent cisco 2911 K9 router

Hi,
I am setting up failover wan for one of my cient and seems everything i have configured correctly but its not working. For track i am using google DNS ip 8.8.8.8 and 8.8.4.4 where if i ping 8.8.8.8 from router it pings but not 8.8.4.4. I I think because 8.8.4.4 no pinging so router does not jump if primary gigabitethernet0/0 down.
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Hello,
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kind regards
Lukasz

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Sudipto
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Hi Sija,
Can i have detailed scenario in your cluster configuration.
Means you are saying that going to start cluster package manually, if it is right please make sure that you had the same copy of start, instance profiles of NodeA to Node B. Means you need to maintain two startup, two instance profiles for both nodes. In a normal situation it will picik the profile of node A to start databse from A node. But in a failover situation it will not pick node A profile to start, it should pick Node B s profiles.
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Regards
Nick Loy

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Check out this post for the invalid message header:
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889517 wrote:
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Please See below Diagnostics:
Managed Server1:
===================================================
Date: Tue Sep 04 18:33:12 IST 2012
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===================================================
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Thanks for your immediate help.

Jms is not working properly in clustered environment

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thanks in advance
Manu

Dear Aravindth
(.*?) means -> Select all contents from where you start and end,
For Ex. <month>(.*?)</month> then Select for start <month> and end last </month> tag.
(?) Match zero or one occurrences. Equivalent to {0,1}.
(*) Match zero or more occurrences. Equivalent to {0,}.
(+) Match one or more occurrences. Equivalent to {1,}.
(.) (Dot). Match any character except newline or another Unicode line terminator.
(.*?) means -> Zero or more times Match any character except newline or another Unicode line terminator + Match zero or more occurrences. Equivalent to {0,}.+Match zero or one occurrences. Equivalent to {0,1}.
Could you please refere the below cite :
http://www.javascriptkit.com/jsref/regexp.shtml
Thanks & Regards
T.R.Harihara SudhaN

Failover is not working in clustering

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