OSCache cluster problem

Hi,

 

Could someone please tell me where I'm going wrong in getting OSCache to
work in a cluster?

 

For starters, I put a simple Web-app consisting of 2 servlets along with
OSCache library on 2 separate identical tomcat installations. (To keep
it very simple, Tomcat is not clustered.)

 

The first servlet creates an instance of ServeletCacheAdministrator and
tries to get a value from cache. If NeedsRefreshException is called,
then value is put in cache from database. 

 

The second servlet simply puts a new value in database and does a
flushAll() on the SCA instance

 

I have the following enabled in my oscache.properties file. 

 

cache.event.listeners=com.opensymphony.oscache.plugins.clustersupport.Ja
vaGroupsBroadcastingListener,com.opensymphony.oscache.extra.CacheEntryEv
entListenerImpl,com.opensymphony.oscache.extra.CacheMapAccessEventListen
erImpl,com.opensymphony.oscache.extra.ScopeEventListenerImpl

 

cache.cluster.multicast.ip=231.12.21.132

 

I found that when I hit the first servlet on each tomcat server, the log
shows that both members have joined the cluster and both show same value
from cache. This is perfectly fine.

 

Now when I hit the second servlet (new value + flushAll) on one server,
the new value is updated in cache on only that server. For some reason
the flushAll event is not getting propagated to the other member in the
cluster, and as a result the other 

server still shows old value in cache. It updates only after the timeout
period. 

 

Please help me out with this, since I'm hoping to recommend OSCache to
Java projects across my company wherever distributed caching requirement
exists.

 

Regards,

 

Winston.  

 

 

 

 

 

 

 



MASTEK
"Making a valuable difference"
Mastek in NASSCOM's 'India Top 20' Software Service Exporters List.
In the US, we're called MAJESCO

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