Hi Ashish:
The requirements for serializability are exactly as they have
been when using HADB based session persistence. And the
answer is yes objects do have to serializable.
regards, Larry White
Ashish Sahni wrote:
> Another question I need answered since I can't actually verify this now -
> For the application session data to be replicated across instances,
> does the data (stored
> in HttpSession) have to be 'instanceof Serializable' ?
>
> More questions inline:
>
> kedar wrote:
>
>>
>>
>> Ashish Sahni wrote:
>>
>>> While I'm waiting for the answer to my original question -
>>> I installed sun webserver 6.1 and this is error I'm stuck at now
>>> while trying to start the web server
>>>
>>> [https-hysteria.sfbay.sun.com]: failure: CORE3170: Configuration
>>> initialization failed: Error running init function load-modules:
>>> dlopen of /abc/gf-cluster/slb/plugins/lbplugin/bin/libpassthrough.so
>>> failed (ld.so.1: webservd: fatal:
>>> /abc/gf-cluster/slb/plugins/lbplugin/bin/libpassthrough.so: wrong
>>> ELF class: ELFCLASS32)
>>>
>>> A file on libpassthrough shows
>>> /abc/gf-cluster/slb/plugins/lbplugin/bin/libpassthrough.so: ELF
>>> 32-bit MSB dynamic lib SPARC32PLUS Version 1, V8+ Required,
>>> UltraSPARC1 Extensions Required, dynamically linked, not stripped
>>>
>>> hysteria is a 64bit sparcv9 box.
>>> Is this is a 32/64 bit mismatch ?
>>>
>> Most likely. I am not sure if the 64-bit binary is available.
>> The only option in this case is to boot your Solaris box in
>> 32-bit mode (ugly, but I am not sure if something else would
>> work).
>
> Yes, I'll hold off on this for now.
>
>
>>> I'm following directions form
>>> https://glassfish.dev.java.net/javaee5/build/GlassFish_LB_Cluster.html
>>> libpassthrough.so is downloaded from step#1 of the loadbalancer
>>> plugin installation steps.
>>>
>>> And my original email questions still holds. Any takers to either ?
>>>
>>> Thanks
>>> Ashish
>>>
>>>
>>>
>>> Ashish Sahni wrote:
>>>
>>>> Hi Folks,
>>>>
>>>> Is there a way to test in-memory replication between two instance
>>>> of a cluster
>>>> on a single machine without setting up the sun-webserver +
>>>> load-balancer ?
>>>> Can another glassfish instance be configured to act as the load
>>>> balancer ?
>>>
>> Consider that you have two instances "foo" and "bar" in
>> a cluster.
>>
>> If the intent is just to "test" that session is preserved,
>>
>> - deploy an application by setting availability-enabled=true on it.
>> - change the session attributes by "physically" contacting "foo".
>> - change the session attribute.
>> - stop instance "foo".
>> - actually contact "bar" and see if you can see the change.
>
> How do I change the session attribute by 'contacting' the instance ?
> Replication of application session is data
> is keyed off of cookies, right ? So I need to manipulate http requests
> to the application, right ?
> First request http://foo:1234/myapp/does-not-work (this request
> modifies session )
> Second request http://bar:4567/myapp/does-not-work( now this request
> will have a different session identifier
> sent from the browser since its a different URL), right ?
> I'll need to go looking for cookies in the request for foo and somehow
> set it in the requests to bar !
>
> Thanks
> Ashish
>
>>
>> Thus, the "work-around" is to contact the servers yourself,
>> rather than through load balancer. Again, this is a work-around.
>>
>>>>
>>>> Thanks
>>>> Ashish
>>>>
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>>>
>>>
>>
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>
>