Are you using an read-write-backing-map-scheme?
If so, any chance that your DB layer is causing some delay in the recovery of data from the database? It is clearly in the log files that it is caused by a get() request, and timeouts happens because the Coherence cluster waits finitely to get data in order to redistributed across the cluster. Try to reproduce the SQL query that is being executed against the database, and check if there are any delays in there. Probably it is the cause of this exception.
We are using read-write-backing-map scheme.I have tried the demo program without coherence plugged in it works fine.
Also i would like to add a point that already data has been loaded in the cache.I am running traffic on the application with one request per second that time i observe this issue after some time of the load start.
Also i think the nodes are taking time to respond back the data.
Thanks and Regards,